]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - model_brush.c
Removed collision_prefernudgedfraction cvar and trace.realfraction field, this has...
[xonotic/darkplaces.git] / model_brush.c
index a5bf318b939549f2d86f09a3813cbd33b3b7f331..1ae93a4eb6d5c58d0a1f0d9ad059f94ec8e447dc 100644 (file)
@@ -27,8 +27,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 
 //cvar_t r_subdivide_size = {CVAR_SAVE, "r_subdivide_size", "128", "how large water polygons should be (smaller values produce more polygons which give better warping effects)"};
+cvar_t mod_bsp_portalize = {0, "mod_bsp_portalize", "1", "enables portal generation from BSP tree (may take several seconds per map), used by r_drawportals, r_useportalculling, r_shadow_realtime_world_compileportalculling, sv_cullentities_portal"};
 cvar_t r_novis = {0, "r_novis", "0", "draws whole level, see also sv_cullentities_pvs 0"};
-cvar_t r_picmipworld = {CVAR_SAVE, "r_picmipworld", "1", "whether gl_picmip shall apply to world textures too"};
 cvar_t r_nosurftextures = {0, "r_nosurftextures", "0", "pretends there was no texture lump found in the q1bsp/hlbsp loading (useful for debugging this rare case)"};
 cvar_t r_subdivisions_tolerance = {0, "r_subdivisions_tolerance", "4", "maximum error tolerance on curve subdivision for rendering purposes (in other words, the curves will be given as many polygons as necessary to represent curves at this quality)"};
 cvar_t r_subdivisions_mintess = {0, "r_subdivisions_mintess", "0", "minimum number of subdivisions (values above 0 will smooth curves that don't need it)"};
@@ -38,6 +38,10 @@ cvar_t r_subdivisions_collision_tolerance = {0, "r_subdivisions_collision_tolera
 cvar_t r_subdivisions_collision_mintess = {0, "r_subdivisions_collision_mintess", "0", "minimum number of subdivisions (values above 0 will smooth curves that don't need it)"};
 cvar_t r_subdivisions_collision_maxtess = {0, "r_subdivisions_collision_maxtess", "1024", "maximum number of subdivisions (prevents curves beyond a certain detail level, limits smoothing)"};
 cvar_t r_subdivisions_collision_maxvertices = {0, "r_subdivisions_collision_maxvertices", "4225", "maximum vertices allowed per subdivided curve"};
+cvar_t r_trippy = {0, "r_trippy", "0", "easter egg"};
+cvar_t r_fxaa = {CVAR_SAVE, "r_fxaa", "0", "fast approximate anti aliasing"};
+cvar_t mod_noshader_default_offsetmapping = {CVAR_SAVE, "mod_noshader_default_offsetmapping", "1", "use offsetmapping by default on all surfaces that are not using q3 shader files"};
+cvar_t mod_obj_orientation = {0, "mod_obj_orientation", "1", "fix orientation of OBJ models to the usual conventions (if zero, use coordinates as is)"};
 cvar_t mod_q3bsp_curves_collisions = {0, "mod_q3bsp_curves_collisions", "1", "enables collisions with curves (SLOW)"};
 cvar_t mod_q3bsp_curves_collisions_stride = {0, "mod_q3bsp_curves_collisions_stride", "16", "collisions against curves: optimize performance by doing a combined collision check for this triangle amount first (-1 avoids any box tests)"};
 cvar_t mod_q3bsp_curves_stride = {0, "mod_q3bsp_curves_stride", "16", "particle effect collisions against curves: optimize performance by doing a combined collision check for this triangle amount first (-1 avoids any box tests)"};
@@ -46,7 +50,14 @@ cvar_t mod_q3bsp_debugtracebrush = {0, "mod_q3bsp_debugtracebrush", "0", "select
 cvar_t mod_q3bsp_lightmapmergepower = {CVAR_SAVE, "mod_q3bsp_lightmapmergepower", "4", "merges the quake3 128x128 lightmap textures into larger lightmap group textures to speed up rendering, 1 = 256x256, 2 = 512x512, 3 = 1024x1024, 4 = 2048x2048, 5 = 4096x4096, ..."};
 cvar_t mod_q3bsp_nolightmaps = {CVAR_SAVE, "mod_q3bsp_nolightmaps", "0", "do not load lightmaps in Q3BSP maps (to save video RAM, but be warned: it looks ugly)"};
 cvar_t mod_q3bsp_tracelineofsight_brushes = {0, "mod_q3bsp_tracelineofsight_brushes", "0", "enables culling of entities behind detail brushes, curves, etc"};
-cvar_t mod_q3shader_default_offsetmapping = {CVAR_SAVE, "mod_q3shader_default_offsetmapping", "1", "use offsetmapping by default on all surfaces"};
+cvar_t mod_q3bsp_sRGBlightmaps = {0, "mod_q3bsp_sRGBlightmaps", "0", "treat lightmaps from Q3 maps as sRGB when vid_sRGB is active"};
+cvar_t mod_q3shader_default_offsetmapping = {CVAR_SAVE, "mod_q3shader_default_offsetmapping", "1", "use offsetmapping by default on all surfaces that are using q3 shader files"};
+cvar_t mod_q3shader_default_offsetmapping_scale = {CVAR_SAVE, "mod_q3shader_default_offsetmapping_scale", "1", "default scale used for offsetmapping"};
+cvar_t mod_q3shader_default_offsetmapping_bias = {CVAR_SAVE, "mod_q3shader_default_offsetmapping_bias", "0", "default bias used for offsetmapping"};
+cvar_t mod_q3shader_default_polygonfactor = {0, "mod_q3shader_default_polygonfactor", "0", "biases depth values of 'polygonoffset' shaders to prevent z-fighting artifacts"};
+cvar_t mod_q3shader_default_polygonoffset = {0, "mod_q3shader_default_polygonoffset", "-2", "biases depth values of 'polygonoffset' shaders to prevent z-fighting artifacts"};
+cvar_t mod_q3shader_force_addalpha = {0, "mod_q3shader_force_addalpha", "0", "treat GL_ONE GL_ONE (or add) blendfunc as GL_SRC_ALPHA GL_ONE for compatibility with older DarkPlaces releases"};
+cvar_t mod_q3shader_force_terrain_alphaflag = {0, "mod_q3shader_force_terrain_alphaflag", "0", "for multilayered terrain shaders force TEXF_ALPHA flag on both layers"};
 
 cvar_t mod_q1bsp_polygoncollisions = {0, "mod_q1bsp_polygoncollisions", "0", "disables use of precomputed cliphulls and instead collides with polygons (uses Bounding Interval Hierarchy optimizations)"};
 cvar_t mod_collision_bih = {0, "mod_collision_bih", "1", "enables use of generated Bounding Interval Hierarchy tree instead of compiled bsp tree in collision code"};
@@ -61,8 +72,8 @@ static texture_t mod_q1bsp_texture_water;
 void Mod_BrushInit(void)
 {
 //     Cvar_RegisterVariable(&r_subdivide_size);
+       Cvar_RegisterVariable(&mod_bsp_portalize);
        Cvar_RegisterVariable(&r_novis);
-       Cvar_RegisterVariable(&r_picmipworld);
        Cvar_RegisterVariable(&r_nosurftextures);
        Cvar_RegisterVariable(&r_subdivisions_tolerance);
        Cvar_RegisterVariable(&r_subdivisions_mintess);
@@ -72,6 +83,10 @@ void Mod_BrushInit(void)
        Cvar_RegisterVariable(&r_subdivisions_collision_mintess);
        Cvar_RegisterVariable(&r_subdivisions_collision_maxtess);
        Cvar_RegisterVariable(&r_subdivisions_collision_maxvertices);
+       Cvar_RegisterVariable(&r_trippy);
+       Cvar_RegisterVariable(&r_fxaa);
+       Cvar_RegisterVariable(&mod_noshader_default_offsetmapping);
+       Cvar_RegisterVariable(&mod_obj_orientation);
        Cvar_RegisterVariable(&mod_q3bsp_curves_collisions);
        Cvar_RegisterVariable(&mod_q3bsp_curves_collisions_stride);
        Cvar_RegisterVariable(&mod_q3bsp_curves_stride);
@@ -79,12 +94,24 @@ void Mod_BrushInit(void)
        Cvar_RegisterVariable(&mod_q3bsp_debugtracebrush);
        Cvar_RegisterVariable(&mod_q3bsp_lightmapmergepower);
        Cvar_RegisterVariable(&mod_q3bsp_nolightmaps);
+       Cvar_RegisterVariable(&mod_q3bsp_sRGBlightmaps);
        Cvar_RegisterVariable(&mod_q3bsp_tracelineofsight_brushes);
        Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping);
+       Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping_scale);
+       Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping_bias);
+       Cvar_RegisterVariable(&mod_q3shader_default_polygonfactor);
+       Cvar_RegisterVariable(&mod_q3shader_default_polygonoffset);
+       Cvar_RegisterVariable(&mod_q3shader_force_addalpha);
+       Cvar_RegisterVariable(&mod_q3shader_force_terrain_alphaflag);
        Cvar_RegisterVariable(&mod_q1bsp_polygoncollisions);
        Cvar_RegisterVariable(&mod_collision_bih);
        Cvar_RegisterVariable(&mod_recalculatenodeboxes);
 
+       // these games were made for older DP engines and are no longer
+       // maintained; use this hack to show their textures properly
+       if(gamemode == GAME_NEXUIZ)
+               Cvar_SetQuick(&mod_q3shader_force_addalpha, "1");
+
        memset(&mod_q1bsp_texture_solid, 0, sizeof(mod_q1bsp_texture_solid));
        strlcpy(mod_q1bsp_texture_solid.name, "solid" , sizeof(mod_q1bsp_texture_solid.name));
        mod_q1bsp_texture_solid.surfaceflags = 0;
@@ -666,7 +693,6 @@ RecursiveHullCheckTraceInfo_t;
 #define HULLCHECKSTATE_SOLID 1
 #define HULLCHECKSTATE_DONE 2
 
-extern cvar_t collision_prefernudgedfraction;
 static int Mod_Q1BSP_RecursiveHullCheck(RecursiveHullCheckTraceInfo_t *t, int num, double p1f, double p2f, double p1[3], double p2[3])
 {
        // status variables, these don't need to be saved on the stack when
@@ -678,156 +704,151 @@ static int Mod_Q1BSP_RecursiveHullCheck(RecursiveHullCheckTraceInfo_t *t, int nu
 
        // variables that need to be stored on the stack when recursing
        mclipnode_t *node;
-       int side;
+       int p1side, p2side;
        double midf, mid[3];
 
-       // LordHavoc: a goto!  everyone flee in terror... :)
-loc0:
-       // check for empty
-       if (num < 0)
-       {
-               num = Mod_Q1BSP_SuperContentsFromNativeContents(NULL, num);
-               if (!t->trace->startfound)
-               {
-                       t->trace->startfound = true;
-                       t->trace->startsupercontents |= num;
-               }
-               if (num & SUPERCONTENTS_LIQUIDSMASK)
-                       t->trace->inwater = true;
-               if (num == 0)
-                       t->trace->inopen = true;
-               if (num & SUPERCONTENTS_SOLID)
-                       t->trace->hittexture = &mod_q1bsp_texture_solid;
-               else if (num & SUPERCONTENTS_SKY)
-                       t->trace->hittexture = &mod_q1bsp_texture_sky;
-               else if (num & SUPERCONTENTS_LAVA)
-                       t->trace->hittexture = &mod_q1bsp_texture_lava;
-               else if (num & SUPERCONTENTS_SLIME)
-                       t->trace->hittexture = &mod_q1bsp_texture_slime;
-               else
-                       t->trace->hittexture = &mod_q1bsp_texture_water;
-               t->trace->hitq3surfaceflags = t->trace->hittexture->surfaceflags;
-               t->trace->hitsupercontents = num;
-               if (num & t->trace->hitsupercontentsmask)
+       // keep looping until we hit a leaf
+       while (num >= 0)
+       {
+               // find the point distances
+               node = t->hull->clipnodes + num;
+               plane = t->hull->planes + node->planenum;
+
+               // axial planes can be calculated more quickly without the DotProduct
+               if (plane->type < 3)
                {
-                       // if the first leaf is solid, set startsolid
-                       if (t->trace->allsolid)
-                               t->trace->startsolid = true;
-#if COLLISIONPARANOID >= 3
-                       Con_Print("S");
-#endif
-                       return HULLCHECKSTATE_SOLID;
+                       t1 = p1[plane->type] - plane->dist;
+                       t2 = p2[plane->type] - plane->dist;
                }
                else
                {
-                       t->trace->allsolid = false;
-#if COLLISIONPARANOID >= 3
-                       Con_Print("E");
-#endif
-                       return HULLCHECKSTATE_EMPTY;
+                       t1 = DotProduct (plane->normal, p1) - plane->dist;
+                       t2 = DotProduct (plane->normal, p2) - plane->dist;
                }
-       }
-
-       // find the point distances
-       node = t->hull->clipnodes + num;
 
-       plane = t->hull->planes + node->planenum;
-       if (plane->type < 3)
-       {
-               t1 = p1[plane->type] - plane->dist;
-               t2 = p2[plane->type] - plane->dist;
-       }
-       else
-       {
-               t1 = DotProduct (plane->normal, p1) - plane->dist;
-               t2 = DotProduct (plane->normal, p2) - plane->dist;
-       }
+               // negative plane distances indicate children[1] (behind plane)
+               p1side = t1 < 0;
+               p2side = t2 < 0;
 
-       if (t1 < 0)
-       {
-               if (t2 < 0)
+               // if the line starts and ends on the same side of the plane, recurse
+               // into that child instantly
+               if (p1side == p2side)
                {
 #if COLLISIONPARANOID >= 3
-                       Con_Print("<");
+                       if (p1side)
+                               Con_Print("<");
+                       else
+                               Con_Print(">");
 #endif
-                       num = node->children[1];
-                       goto loc0;
+                       // loop back and process the start child
+                       num = node->children[p1side];
                }
-               side = 1;
-       }
-       else
-       {
-               if (t2 >= 0)
+               else
                {
+                       // find the midpoint where the line crosses the plane, use the
+                       // original line for best accuracy
 #if COLLISIONPARANOID >= 3
-                       Con_Print(">");
+                       Con_Print("M");
 #endif
-                       num = node->children[0];
-                       goto loc0;
-               }
-               side = 0;
-       }
+                       if (plane->type < 3)
+                       {
+                               t1 = t->start[plane->type] - plane->dist;
+                               t2 = t->end[plane->type] - plane->dist;
+                       }
+                       else
+                       {
+                               t1 = DotProduct (plane->normal, t->start) - plane->dist;
+                               t2 = DotProduct (plane->normal, t->end) - plane->dist;
+                       }
+                       midf = t1 / (t1 - t2);
+                       midf = bound(p1f, midf, p2f);
+                       VectorMA(t->start, midf, t->dist, mid);
+
+                       // we now have a mid point, essentially splitting the line into
+                       // the segments in the near child and the far child, we can now
+                       // recurse those in order and get their results
+
+                       // recurse both sides, front side first
+                       ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[p1side], p1f, midf, p1, mid);
+                       // if this side is not empty, return what it is (solid or done)
+                       if (ret != HULLCHECKSTATE_EMPTY)
+                               return ret;
+
+                       ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[p2side], midf, p2f, mid, p2);
+                       // if other side is not solid, return what it is (empty or done)
+                       if (ret != HULLCHECKSTATE_SOLID)
+                               return ret;
+
+                       // front is air and back is solid, this is the impact point...
+
+                       // copy the plane information, flipping it if needed
+                       if (p1side)
+                       {
+                               t->trace->plane.dist = -plane->dist;
+                               VectorNegate (plane->normal, t->trace->plane.normal);
+                       }
+                       else
+                       {
+                               t->trace->plane.dist = plane->dist;
+                               VectorCopy (plane->normal, t->trace->plane.normal);
+                       }
+
+                       // calculate the return fraction which is nudged off the surface a bit
+                       t1 = DotProduct(t->trace->plane.normal, t->start) - t->trace->plane.dist;
+                       t2 = DotProduct(t->trace->plane.normal, t->end) - t->trace->plane.dist;
+                       midf = (t1 - collision_impactnudge.value) / (t1 - t2);
+                       t->trace->fraction = bound(0, midf, 1);
 
-       // the line intersects, find intersection point
-       // LordHavoc: this uses the original trace for maximum accuracy
 #if COLLISIONPARANOID >= 3
-       Con_Print("M");
+                       Con_Print("D");
 #endif
-       if (plane->type < 3)
-       {
-               t1 = t->start[plane->type] - plane->dist;
-               t2 = t->end[plane->type] - plane->dist;
-       }
-       else
-       {
-               t1 = DotProduct (plane->normal, t->start) - plane->dist;
-               t2 = DotProduct (plane->normal, t->end) - plane->dist;
+                       return HULLCHECKSTATE_DONE;
+               }
        }
 
-       midf = t1 / (t1 - t2);
-       midf = bound(p1f, midf, p2f);
-       VectorMA(t->start, midf, t->dist, mid);
-
-       // recurse both sides, front side first
-       ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[side], p1f, midf, p1, mid);
-       // if this side is not empty, return what it is (solid or done)
-       if (ret != HULLCHECKSTATE_EMPTY)
-               return ret;
-
-       ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[side ^ 1], midf, p2f, mid, p2);
-       // if other side is not solid, return what it is (empty or done)
-       if (ret != HULLCHECKSTATE_SOLID)
-               return ret;
+       // we reached a leaf contents
 
-       // front is air and back is solid, this is the impact point...
-       if (side)
+       // check for empty
+       num = Mod_Q1BSP_SuperContentsFromNativeContents(NULL, num);
+       if (!t->trace->startfound)
        {
-               t->trace->plane.dist = -plane->dist;
-               VectorNegate (plane->normal, t->trace->plane.normal);
+               t->trace->startfound = true;
+               t->trace->startsupercontents |= num;
        }
+       if (num & SUPERCONTENTS_LIQUIDSMASK)
+               t->trace->inwater = true;
+       if (num == 0)
+               t->trace->inopen = true;
+       if (num & SUPERCONTENTS_SOLID)
+               t->trace->hittexture = &mod_q1bsp_texture_solid;
+       else if (num & SUPERCONTENTS_SKY)
+               t->trace->hittexture = &mod_q1bsp_texture_sky;
+       else if (num & SUPERCONTENTS_LAVA)
+               t->trace->hittexture = &mod_q1bsp_texture_lava;
+       else if (num & SUPERCONTENTS_SLIME)
+               t->trace->hittexture = &mod_q1bsp_texture_slime;
        else
+               t->trace->hittexture = &mod_q1bsp_texture_water;
+       t->trace->hitq3surfaceflags = t->trace->hittexture->surfaceflags;
+       t->trace->hitsupercontents = num;
+       if (num & t->trace->hitsupercontentsmask)
        {
-               t->trace->plane.dist = plane->dist;
-               VectorCopy (plane->normal, t->trace->plane.normal);
+               // if the first leaf is solid, set startsolid
+               if (t->trace->allsolid)
+                       t->trace->startsolid = true;
+#if COLLISIONPARANOID >= 3
+               Con_Print("S");
+#endif
+               return HULLCHECKSTATE_SOLID;
        }
-
-       // calculate the true fraction
-       t1 = DotProduct(t->trace->plane.normal, t->start) - t->trace->plane.dist;
-       t2 = DotProduct(t->trace->plane.normal, t->end) - t->trace->plane.dist;
-       midf = t1 / (t1 - t2);
-       t->trace->realfraction = bound(0, midf, 1);
-
-       // calculate the return fraction which is nudged off the surface a bit
-       midf = (t1 - DIST_EPSILON) / (t1 - t2);
-       t->trace->fraction = bound(0, midf, 1);
-
-       if (collision_prefernudgedfraction.integer)
-               t->trace->realfraction = t->trace->fraction;
-
+       else
+       {
+               t->trace->allsolid = false;
 #if COLLISIONPARANOID >= 3
-       Con_Print("D");
+               Con_Print("E");
 #endif
-       return HULLCHECKSTATE_DONE;
+               return HULLCHECKSTATE_EMPTY;
+       }
 }
 
 //#if COLLISIONPARANOID < 2
@@ -870,7 +891,6 @@ static void Mod_Q1BSP_TracePoint(struct model_s *model, const frameblend_t *fram
        memset(trace, 0, sizeof(trace_t));
        rhc.trace = trace;
        rhc.trace->fraction = 1;
-       rhc.trace->realfraction = 1;
        rhc.trace->allsolid = true;
        rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
        VectorCopy(start, rhc.start);
@@ -878,6 +898,8 @@ static void Mod_Q1BSP_TracePoint(struct model_s *model, const frameblend_t *fram
        Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
 }
 
+static void Mod_Q1BSP_TraceLineAgainstSurfaces(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask);
+
 static void Mod_Q1BSP_TraceLine(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
 {
        RecursiveHullCheckTraceInfo_t rhc;
@@ -888,12 +910,18 @@ static void Mod_Q1BSP_TraceLine(struct model_s *model, const frameblend_t *frame
                return;
        }
 
+       // sometimes we want to traceline against polygons so we can report the texture that was hit rather than merely a contents, but using this method breaks one of negke's maps so it must be a cvar check...
+       if (sv_gameplayfix_q1bsptracelinereportstexture.integer)
+       {
+               Mod_Q1BSP_TraceLineAgainstSurfaces(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
+               return;
+       }
+
        memset(&rhc, 0, sizeof(rhc));
        memset(trace, 0, sizeof(trace_t));
        rhc.trace = trace;
        rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
        rhc.trace->fraction = 1;
-       rhc.trace->realfraction = 1;
        rhc.trace->allsolid = true;
        rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
        VectorCopy(start, rhc.start);
@@ -911,7 +939,6 @@ static void Mod_Q1BSP_TraceLine(struct model_s *model, const frameblend_t *frame
                rhc.trace = &testtrace;
                rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
                rhc.trace->fraction = 1;
-               rhc.trace->realfraction = 1;
                rhc.trace->allsolid = true;
                VectorCopy(test, rhc.start);
                VectorCopy(test, rhc.end);
@@ -950,7 +977,6 @@ static void Mod_Q1BSP_TraceBox(struct model_s *model, const frameblend_t *frameb
        rhc.trace = trace;
        rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
        rhc.trace->fraction = 1;
-       rhc.trace->realfraction = 1;
        rhc.trace->allsolid = true;
        VectorSubtract(boxmaxs, boxmins, boxsize);
        if (boxsize[0] < 3)
@@ -993,7 +1019,6 @@ static void Mod_Q1BSP_TraceBox(struct model_s *model, const frameblend_t *frameb
                rhc.trace = &testtrace;
                rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
                rhc.trace->fraction = 1;
-               rhc.trace->realfraction = 1;
                rhc.trace->allsolid = true;
                VectorCopy(test, rhc.start);
                VectorCopy(test, rhc.end);
@@ -1062,7 +1087,6 @@ void Collision_ClipTrace_Box(trace_t *trace, const vec3_t cmins, const vec3_t cm
        memset(trace, 0, sizeof(trace_t));
        trace->hitsupercontentsmask = hitsupercontentsmask;
        trace->fraction = 1;
-       trace->realfraction = 1;
        Collision_TraceLineBrushFloat(trace, start, end, &cbox, &cbox);
 #else
        RecursiveHullCheckTraceInfo_t rhc;
@@ -1120,7 +1144,6 @@ void Collision_ClipTrace_Box(trace_t *trace, const vec3_t cmins, const vec3_t cm
        rhc.trace = trace;
        rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
        rhc.trace->fraction = 1;
-       rhc.trace->realfraction = 1;
        rhc.trace->allsolid = true;
        VectorCopy(start, rhc.start);
        VectorCopy(end, rhc.end);
@@ -1136,7 +1159,6 @@ void Collision_ClipTrace_Point(trace_t *trace, const vec3_t cmins, const vec3_t
 {
        memset(trace, 0, sizeof(trace_t));
        trace->fraction = 1;
-       trace->realfraction = 1;
        if (BoxesOverlap(start, start, cmins, cmaxs))
        {
                trace->startsupercontents |= boxsupercontents;
@@ -1151,7 +1173,7 @@ void Collision_ClipTrace_Point(trace_t *trace, const vec3_t cmins, const vec3_t
 static qboolean Mod_Q1BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end)
 {
        trace_t trace;
-       model->TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK);
+       Mod_Q1BSP_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK);
        return trace.fraction == 1;
 }
 
@@ -1161,52 +1183,50 @@ static int Mod_Q1BSP_LightPoint_RecursiveBSPNode(dp_model_t *model, vec3_t ambie
        float front, back;
        float mid, distz = endz - startz;
 
-loc0:
-       if (!node->plane)
-               return false;           // didn't hit anything
-
-       switch (node->plane->type)
+       while (node->plane)
        {
-       case PLANE_X:
-               node = node->children[x < node->plane->dist];
-               goto loc0;
-       case PLANE_Y:
-               node = node->children[y < node->plane->dist];
-               goto loc0;
-       case PLANE_Z:
-               side = startz < node->plane->dist;
-               if ((endz < node->plane->dist) == side)
-               {
-                       node = node->children[side];
-                       goto loc0;
-               }
-               // found an intersection
-               mid = node->plane->dist;
-               break;
-       default:
-               back = front = x * node->plane->normal[0] + y * node->plane->normal[1];
-               front += startz * node->plane->normal[2];
-               back += endz * node->plane->normal[2];
-               side = front < node->plane->dist;
-               if ((back < node->plane->dist) == side)
-               {
-                       node = node->children[side];
-                       goto loc0;
+               switch (node->plane->type)
+               {
+               case PLANE_X:
+                       node = node->children[x < node->plane->dist];
+                       continue; // loop back and process the new node
+               case PLANE_Y:
+                       node = node->children[y < node->plane->dist];
+                       continue; // loop back and process the new node
+               case PLANE_Z:
+                       side = startz < node->plane->dist;
+                       if ((endz < node->plane->dist) == side)
+                       {
+                               node = node->children[side];
+                               continue; // loop back and process the new node
+                       }
+                       // found an intersection
+                       mid = node->plane->dist;
+                       break;
+               default:
+                       back = front = x * node->plane->normal[0] + y * node->plane->normal[1];
+                       front += startz * node->plane->normal[2];
+                       back += endz * node->plane->normal[2];
+                       side = front < node->plane->dist;
+                       if ((back < node->plane->dist) == side)
+                       {
+                               node = node->children[side];
+                               continue; // loop back and process the new node
+                       }
+                       // found an intersection
+                       mid = startz + distz * (front - node->plane->dist) / (front - back);
+                       break;
                }
-               // found an intersection
-               mid = startz + distz * (front - node->plane->dist) / (front - back);
-               break;
-       }
 
-       // go down front side
-       if (node->children[side]->plane && Mod_Q1BSP_LightPoint_RecursiveBSPNode(model, ambientcolor, diffusecolor, diffusenormal, node->children[side], x, y, startz, mid))
-               return true;    // hit something
-       else
-       {
+               // go down front side
+               if (node->children[side]->plane && Mod_Q1BSP_LightPoint_RecursiveBSPNode(model, ambientcolor, diffusecolor, diffusenormal, node->children[side], x, y, startz, mid))
+                       return true;    // hit something
+
                // check for impact on this node
                if (node->numsurfaces)
                {
-                       int i, dsi, dti, lmwidth, lmheight;
+                       unsigned int i;
+                       int dsi, dti, lmwidth, lmheight;
                        float ds, dt;
                        msurface_t *surface;
                        unsigned char *lightmap;
@@ -1226,22 +1246,44 @@ loc0:
                                dt = ((x * surface->lightmapinfo->texinfo->vecs[1][0] + y * surface->lightmapinfo->texinfo->vecs[1][1] + mid * surface->lightmapinfo->texinfo->vecs[1][2] + surface->lightmapinfo->texinfo->vecs[1][3]) - surface->lightmapinfo->texturemins[1]) * 0.0625f;
 
                                // check the bounds
-                               dsi = (int)ds;
-                               dti = (int)dt;
+                               // thanks to jitspoe for pointing out that this int cast was
+                               // rounding toward zero, so we floor it
+                               dsi = (int)floor(ds);
+                               dti = (int)floor(dt);
                                lmwidth = ((surface->lightmapinfo->extents[0]>>4)+1);
                                lmheight = ((surface->lightmapinfo->extents[1]>>4)+1);
 
                                // is it in bounds?
-                               if (dsi >= 0 && dsi < lmwidth-1 && dti >= 0 && dti < lmheight-1)
+                               // we have to tolerate a position of lmwidth-1 for some rare
+                               // cases - in which case the sampling position still gets
+                               // clamped but the color gets interpolated to that edge.
+                               if (dsi >= 0 && dsi < lmwidth && dti >= 0 && dti < lmheight)
                                {
+                                       // in the rare cases where we're sampling slightly off
+                                       // the polygon, clamp the sampling position (we can still
+                                       // interpolate outside it, where it becomes extrapolation)
+                                       if (dsi < 0)
+                                               dsi = 0;
+                                       if (dti < 0)
+                                               dti = 0;
+                                       if (dsi > lmwidth-2)
+                                               dsi = lmwidth-2;
+                                       if (dti > lmheight-2)
+                                               dti = lmheight-2;
+                                       
                                        // calculate bilinear interpolation factors
-                                       // and also multiply by fixedpoint conversion factors
+                                       // and also multiply by fixedpoint conversion factors to
+                                       // compensate for lightmaps being 0-255 (as 0-2), we use
+                                       // r_refdef.scene.rtlightstylevalue here which is already
+                                       // 0.000-2.148 range
+                                       // (if we used r_refdef.scene.lightstylevalue this
+                                       //  divisor would be 32768 rather than 128)
                                        dsfrac = ds - dsi;
                                        dtfrac = dt - dti;
-                                       w00 = (1 - dsfrac) * (1 - dtfrac) * (1.0f / 32768.0f);
-                                       w01 = (    dsfrac) * (1 - dtfrac) * (1.0f / 32768.0f);
-                                       w10 = (1 - dsfrac) * (    dtfrac) * (1.0f / 32768.0f);
-                                       w11 = (    dsfrac) * (    dtfrac) * (1.0f / 32768.0f);
+                                       w00 = (1 - dsfrac) * (1 - dtfrac) * (1.0f / 128.0f);
+                                       w01 = (    dsfrac) * (1 - dtfrac) * (1.0f / 128.0f);
+                                       w10 = (1 - dsfrac) * (    dtfrac) * (1.0f / 128.0f);
+                                       w11 = (    dsfrac) * (    dtfrac) * (1.0f / 128.0f);
 
                                        // values for pointer math
                                        line3 = lmwidth * 3; // LordHavoc: *3 for colored lighting
@@ -1253,7 +1295,7 @@ loc0:
                                        // bilinear filter each lightmap style, and sum them
                                        for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++)
                                        {
-                                               scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]];
+                                               scale = r_refdef.scene.rtlightstylevalue[surface->lightmapinfo->styles[maps]];
                                                w = w00 * scale;VectorMA(ambientcolor, w, lightmap            , ambientcolor);
                                                w = w01 * scale;VectorMA(ambientcolor, w, lightmap + 3        , ambientcolor);
                                                w = w10 * scale;VectorMA(ambientcolor, w, lightmap + line3    , ambientcolor);
@@ -1270,11 +1312,14 @@ loc0:
                node = node->children[side ^ 1];
                startz = mid;
                distz = endz - startz;
-               goto loc0;
+               // loop back and process the new node
        }
+
+       // did not hit anything
+       return false;
 }
 
-void Mod_Q1BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
+static void Mod_Q1BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
 {
        // pretend lighting is coming down from above (due to lack of a lightgrid to know primary lighting direction)
        VectorSet(diffusenormal, 0, 0, 1);
@@ -1289,6 +1334,180 @@ void Mod_Q1BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambientcolor
        Mod_Q1BSP_LightPoint_RecursiveBSPNode(model, ambientcolor, diffusecolor, diffusenormal, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, p[0], p[1], p[2] + 0.125, p[2] - 65536);
 }
 
+static const texture_t *Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(RecursiveHullCheckTraceInfo_t *t, const dp_model_t *model, const mnode_t *node, double mid[3])
+{
+       unsigned int i;
+       int j;
+       int k;
+       const msurface_t *surface;
+       float normal[3];
+       float v0[3];
+       float v1[3];
+       float edgedir[3];
+       float edgenormal[3];
+       float p[4];
+       float midf;
+       float t1;
+       float t2;
+       VectorCopy(mid, p);
+       p[3] = 1;
+       surface = model->data_surfaces + node->firstsurface;
+       for (i = 0;i < node->numsurfaces;i++, surface++)
+       {
+               // skip surfaces whose bounding box does not include the point
+//             if (!BoxesOverlap(mid, mid, surface->mins, surface->maxs))
+//                     continue;
+               // skip faces with contents we don't care about
+               if (!(t->trace->hitsupercontentsmask & surface->texture->supercontents))
+                       continue;
+               // get the surface normal - since it is flat we know any vertex normal will suffice
+               VectorCopy(model->surfmesh.data_normal3f + 3 * surface->num_firstvertex, normal);
+               // skip backfaces
+               if (DotProduct(t->dist, normal) > 0)
+                       continue;
+               // iterate edges and see if the point is outside one of them
+               for (j = 0, k = surface->num_vertices - 1;j < surface->num_vertices;k = j, j++)
+               {
+                       VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + k), v0);
+                       VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + j), v1);
+                       VectorSubtract(v0, v1, edgedir);
+                       CrossProduct(edgedir, normal, edgenormal);
+                       if (DotProduct(edgenormal, p) > DotProduct(edgenormal, v0))
+                               break;
+               }
+               // if the point is outside one of the edges, it is not within the surface
+               if (j < surface->num_vertices)
+                       continue;
+
+               // we hit a surface, this is the impact point...
+               VectorCopy(normal, t->trace->plane.normal);
+               t->trace->plane.dist = DotProduct(normal, p);
+
+               // calculate the return fraction which is nudged off the surface a bit
+               t1 = DotProduct(t->start, t->trace->plane.normal) - t->trace->plane.dist;
+               t2 = DotProduct(t->end, t->trace->plane.normal) - t->trace->plane.dist;
+               midf = (t1 - collision_impactnudge.value) / (t1 - t2);
+               t->trace->fraction = bound(0, midf, 1);
+
+               t->trace->hittexture = surface->texture->currentframe;
+               t->trace->hitq3surfaceflags = t->trace->hittexture->surfaceflags;
+               t->trace->hitsupercontents = t->trace->hittexture->supercontents;
+               return surface->texture->currentframe;
+       }
+       return NULL;
+}
+
+static int Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(RecursiveHullCheckTraceInfo_t *t, const dp_model_t *model, const mnode_t *node, const double p1[3], const double p2[3])
+{
+       const mplane_t *plane;
+       double t1, t2;
+       int side;
+       double midf, mid[3];
+       const mleaf_t *leaf;
+
+       while (node->plane)
+       {
+               plane = node->plane;
+               if (plane->type < 3)
+               {
+                       t1 = p1[plane->type] - plane->dist;
+                       t2 = p2[plane->type] - plane->dist;
+               }
+               else
+               {
+                       t1 = DotProduct (plane->normal, p1) - plane->dist;
+                       t2 = DotProduct (plane->normal, p2) - plane->dist;
+               }
+               if (t1 < 0)
+               {
+                       if (t2 < 0)
+                       {
+                               node = node->children[1];
+                               continue;
+                       }
+                       side = 1;
+               }
+               else
+               {
+                       if (t2 >= 0)
+                       {
+                               node = node->children[0];
+                               continue;
+                       }
+                       side = 0;
+               }
+
+               // the line intersects, find intersection point
+               // LordHavoc: this uses the original trace for maximum accuracy
+               if (plane->type < 3)
+               {
+                       t1 = t->start[plane->type] - plane->dist;
+                       t2 = t->end[plane->type] - plane->dist;
+               }
+               else
+               {
+                       t1 = DotProduct (plane->normal, t->start) - plane->dist;
+                       t2 = DotProduct (plane->normal, t->end) - plane->dist;
+               }
+       
+               midf = t1 / (t1 - t2);
+               VectorMA(t->start, midf, t->dist, mid);
+
+               // recurse both sides, front side first, return if we hit a surface
+               if (Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side], p1, mid) == HULLCHECKSTATE_DONE)
+                       return HULLCHECKSTATE_DONE;
+
+               // test each surface on the node
+               Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(t, model, node, mid);
+               if (t->trace->hittexture)
+                       return HULLCHECKSTATE_DONE;
+
+               // recurse back side
+               return Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side ^ 1], mid, p2);
+       }
+       leaf = (const mleaf_t *)node;
+       side = Mod_Q1BSP_SuperContentsFromNativeContents(NULL, leaf->contents);
+       if (!t->trace->startfound)
+       {
+               t->trace->startfound = true;
+               t->trace->startsupercontents |= side;
+       }
+       if (side & SUPERCONTENTS_LIQUIDSMASK)
+               t->trace->inwater = true;
+       if (side == 0)
+               t->trace->inopen = true;
+       if (side & t->trace->hitsupercontentsmask)
+       {
+               // if the first leaf is solid, set startsolid
+               if (t->trace->allsolid)
+                       t->trace->startsolid = true;
+               return HULLCHECKSTATE_SOLID;
+       }
+       else
+       {
+               t->trace->allsolid = false;
+               return HULLCHECKSTATE_EMPTY;
+       }
+}
+
+static void Mod_Q1BSP_TraceLineAgainstSurfaces(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
+{
+       RecursiveHullCheckTraceInfo_t rhc;
+
+       memset(&rhc, 0, sizeof(rhc));
+       memset(trace, 0, sizeof(trace_t));
+       rhc.trace = trace;
+       rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
+       rhc.trace->fraction = 1;
+       rhc.trace->allsolid = true;
+       rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
+       VectorCopy(start, rhc.start);
+       VectorCopy(end, rhc.end);
+       VectorSubtract(rhc.end, rhc.start, rhc.dist);
+       Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(&rhc, model, model->brush.data_nodes + rhc.hull->firstclipnode, rhc.start, rhc.end);
+       VectorMA(rhc.start, rhc.trace->fraction, rhc.dist, rhc.trace->endpos);
+}
+
 static void Mod_Q1BSP_DecompressVis(const unsigned char *in, const unsigned char *inend, unsigned char *out, unsigned char *outend)
 {
        int c;
@@ -1330,13 +1549,13 @@ R_Q1BSP_LoadSplitSky
 A sky texture is 256*128, with the right side being a masked overlay
 ==============
 */
-void R_Q1BSP_LoadSplitSky (unsigned char *src, int width, int height, int bytesperpixel)
+static void R_Q1BSP_LoadSplitSky (unsigned char *src, int width, int height, int bytesperpixel)
 {
        int x, y;
        int w = width/2;
        int h = height;
-       unsigned *solidpixels = Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
-       unsigned *alphapixels = Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
+       unsigned int *solidpixels = (unsigned int *)Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
+       unsigned int *alphapixels = (unsigned int *)Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
 
        // allocate a texture pool if we need it
        if (loadmodel->texturepool == NULL && cls.state != ca_dedicated)
@@ -1390,39 +1609,38 @@ void R_Q1BSP_LoadSplitSky (unsigned char *src, int width, int height, int bytesp
                }
        }
 
-       loadmodel->brush.solidskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_solidtexture", 0         , (unsigned char *) solidpixels, w, h);
-       loadmodel->brush.alphaskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_alphatexture", TEXF_ALPHA, (unsigned char *) alphapixels, w, h);
+       loadmodel->brush.solidskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_solidtexture", 0         , (unsigned char *) solidpixels, w, h, vid.sRGB3D);
+       loadmodel->brush.alphaskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_alphatexture", TEXF_ALPHA, (unsigned char *) alphapixels, w, h, vid.sRGB3D);
        Mem_Free(solidpixels);
        Mem_Free(alphapixels);
 }
 
-static void Mod_Q1BSP_LoadTextures(lump_t *l)
+static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
 {
-       int i, j, k, num, max, altmax, mtwidth, mtheight, *dofs, incomplete;
+       int i, j, k, num, max, altmax, mtwidth, mtheight, doffset, incomplete, nummiptex = 0;
        skinframe_t *skinframe;
-       miptex_t *dmiptex;
        texture_t *tx, *tx2, *anims[10], *altanims[10];
-       dmiptexlump_t *m;
+       texture_t backuptex;
        unsigned char *data, *mtdata;
        const char *s;
        char mapname[MAX_QPATH], name[MAX_QPATH];
-       unsigned char zero[4];
-
-       memset(zero, 0, sizeof(zero));
+       unsigned char zeroopaque[4], zerotrans[4];
+       sizebuf_t miptexsb;
+       char vabuf[1024];
+       Vector4Set(zeroopaque, 0, 0, 0, 255);
+       Vector4Set(zerotrans, 0, 0, 0, 128);
 
        loadmodel->data_textures = NULL;
 
        // add two slots for notexture walls and notexture liquids
-       if (l->filelen)
+       if (sb->cursize)
        {
-               m = (dmiptexlump_t *)(mod_base + l->fileofs);
-               m->nummiptex = LittleLong (m->nummiptex);
-               loadmodel->num_textures = m->nummiptex + 2;
+               nummiptex = MSG_ReadLittleLong(sb);
+               loadmodel->num_textures = nummiptex + 2;
                loadmodel->num_texturesperskin = loadmodel->num_textures;
        }
        else
        {
-               m = NULL;
                loadmodel->num_textures = 2;
                loadmodel->num_texturesperskin = loadmodel->num_textures;
        }
@@ -1468,13 +1686,17 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                tx->reflectfactor = 1;
                Vector4Set(tx->reflectcolor4f, 1, 1, 1, 1);
                tx->r_water_wateralpha = 1;
-               tx->offsetmapping = OFFSETMAPPING_OFF;
+               tx->offsetmapping = OFFSETMAPPING_DEFAULT;
                tx->offsetscale = 1;
+               tx->offsetbias = 0;
                tx->specularscalemod = 1;
                tx->specularpowermod = 1;
+               tx->transparentsort = TRANSPARENTSORT_DISTANCE;
+               // WHEN ADDING DEFAULTS HERE, REMEMBER TO PUT DEFAULTS IN ALL LOADERS
+               // JUST GREP FOR "specularscalemod = 1".
        }
 
-       if (!m)
+       if (!sb->cursize)
        {
                Con_Printf("%s: no miptex lump to load textures from\n", loadmodel->name);
                return;
@@ -1486,26 +1708,29 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
        FS_StripExtension(s, mapname, sizeof(mapname));
 
        // just to work around bounds checking when debugging with it (array index out of bounds error thing)
-       dofs = m->dataofs;
        // LordHavoc: mostly rewritten map texture loader
-       for (i = 0;i < m->nummiptex;i++)
+       for (i = 0;i < nummiptex;i++)
        {
-               dofs[i] = LittleLong(dofs[i]);
+               doffset = MSG_ReadLittleLong(sb);
                if (r_nosurftextures.integer)
                        continue;
-               if (dofs[i] == -1)
+               if (doffset == -1)
                {
                        Con_DPrintf("%s: miptex #%i missing\n", loadmodel->name, i);
                        continue;
                }
-               dmiptex = (miptex_t *)((unsigned char *)m + dofs[i]);
+
+               MSG_InitReadBuffer(&miptexsb, sb->data + doffset, sb->cursize - doffset);
 
                // copy name, but only up to 16 characters
                // (the output buffer can hold more than this, but the input buffer is
                //  only 16)
-               for (j = 0;j < 16 && dmiptex->name[j];j++)
-                       name[j] = dmiptex->name[j];
+               for (j = 0;j < 16;j++)
+                       name[j] = MSG_ReadByte(&miptexsb);
                name[j] = 0;
+               // pretty up the buffer (replacing any trailing garbage with 0)
+               for (j = strlen(name);j < 16;j++)
+                       name[j] = 0;
 
                if (!name[0])
                {
@@ -1513,31 +1738,34 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                        Con_DPrintf("%s: warning: renaming unnamed texture to %s\n", loadmodel->name, name);
                }
 
-               mtwidth = LittleLong(dmiptex->width);
-               mtheight = LittleLong(dmiptex->height);
+               mtwidth = MSG_ReadLittleLong(&miptexsb);
+               mtheight = MSG_ReadLittleLong(&miptexsb);
                mtdata = NULL;
-               j = LittleLong(dmiptex->offsets[0]);
+               j = MSG_ReadLittleLong(&miptexsb);
                if (j)
                {
                        // texture included
-                       if (j < 40 || j + mtwidth * mtheight > l->filelen)
+                       if (j < 40 || j + mtwidth * mtheight > miptexsb.cursize)
                        {
-                               Con_Printf("%s: Texture \"%s\" is corrupt or incomplete\n", loadmodel->name, dmiptex->name);
+                               Con_Printf("%s: Texture \"%s\" is corrupt or incomplete\n", loadmodel->name, name);
                                continue;
                        }
-                       mtdata = (unsigned char *)dmiptex + j;
+                       mtdata = miptexsb.data + j;
                }
 
                if ((mtwidth & 15) || (mtheight & 15))
-                       Con_DPrintf("%s: warning: texture \"%s\" is not 16 aligned\n", loadmodel->name, dmiptex->name);
+                       Con_DPrintf("%s: warning: texture \"%s\" is not 16 aligned\n", loadmodel->name, name);
 
                // LordHavoc: force all names to lowercase
                for (j = 0;name[j];j++)
                        if (name[j] >= 'A' && name[j] <= 'Z')
                                name[j] += 'a' - 'A';
 
-               if (dmiptex->name[0] && Mod_LoadTextureFromQ3Shader(loadmodel->data_textures + i, name, false, false, 0))
+               // LordHavoc: backup the texture_t because q3 shader loading overwrites it
+               backuptex = loadmodel->data_textures[i];
+               if (name[0] && Mod_LoadTextureFromQ3Shader(loadmodel->data_textures + i, name, false, false, 0))
                        continue;
+               loadmodel->data_textures[i] = backuptex;
 
                tx = loadmodel->data_textures + i;
                strlcpy(tx->name, name, sizeof(tx->name));
@@ -1566,6 +1794,8 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                {
                        tx->supercontents = mod_q1bsp_texture_sky.supercontents;
                        tx->surfaceflags = mod_q1bsp_texture_sky.surfaceflags;
+                       // for the surface traceline we need to hit this surface as a solid...
+                       tx->supercontents |= SUPERCONTENTS_SOLID;
                }
                else
                {
@@ -1578,7 +1808,9 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                        // LordHavoc: HL sky textures are entirely different than quake
                        if (!loadmodel->brush.ishlbsp && !strncmp(tx->name, "sky", 3) && mtwidth == mtheight * 2)
                        {
-                               data = loadimagepixelsbgra(tx->name, false, false, r_texture_convertsRGB_skin.integer);
+                               data = loadimagepixelsbgra(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s/%s", mapname, tx->name), false, false, false, NULL);
+                               if (!data)
+                                       data = loadimagepixelsbgra(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s", tx->name), false, false, false, NULL);
                                if (data && image_width == image_height * 2)
                                {
                                        R_Q1BSP_LoadSplitSky(data, image_width, image_height, 4);
@@ -1589,9 +1821,11 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                        }
                        else
                        {
-                               skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va("textures/%s/%s", mapname, tx->name), TEXF_ALPHA | TEXF_MIPMAP | (r_picmipworld.integer ? TEXF_PICMIP : 0) | TEXF_COMPRESS, false);
+                               skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s/%s", mapname, tx->name), TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, false);
                                if (!skinframe)
-                                       skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va("textures/%s", tx->name), TEXF_ALPHA | TEXF_MIPMAP | (r_picmipworld.integer ? TEXF_PICMIP : 0) | TEXF_COMPRESS, false);
+                                       skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va(vabuf, sizeof(vabuf), "textures/%s", tx->name), TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, false);
+                               if (skinframe)
+                                       tx->offsetmapping = OFFSETMAPPING_DEFAULT; // allow offsetmapping on external textures without a q3 shader
                                if (!skinframe)
                                {
                                        // did not find external texture, load it from the bsp or wad3
@@ -1601,67 +1835,67 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                                                unsigned char *pixels, *freepixels;
                                                pixels = freepixels = NULL;
                                                if (mtdata)
-                                                       pixels = W_ConvertWAD3TextureBGRA(dmiptex);
+                                                       pixels = W_ConvertWAD3TextureBGRA(&miptexsb);
                                                if (pixels == NULL)
                                                        pixels = freepixels = W_GetTextureBGRA(tx->name);
                                                if (pixels != NULL)
                                                {
                                                        tx->width = image_width;
                                                        tx->height = image_height;
-                                                       skinframe = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_ALPHA | TEXF_MIPMAP | (r_picmipworld.integer ? TEXF_PICMIP : 0), pixels, image_width, image_height);
+                                                       skinframe = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP, pixels, image_width, image_height, true);
                                                }
                                                if (freepixels)
                                                        Mem_Free(freepixels);
                                        }
                                        else if (mtdata) // texture included
-                                               skinframe = R_SkinFrame_LoadInternalQuake(tx->name, TEXF_MIPMAP | (r_picmipworld.integer ? TEXF_PICMIP : 0), false, r_fullbrights.integer, mtdata, tx->width, tx->height);
+                                               skinframe = R_SkinFrame_LoadInternalQuake(tx->name, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP, false, r_fullbrights.integer, mtdata, tx->width, tx->height);
                                }
                                // if skinframe is still NULL the "missing" texture will be used
                                if (skinframe)
                                        tx->skinframes[0] = skinframe;
                        }
-
-                       tx->basematerialflags = MATERIALFLAG_WALL;
-                       if (tx->name[0] == '*')
-                       {
-                               // LordHavoc: some turbulent textures should not be affected by wateralpha
-                               if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
-                               {
-                                       // replace the texture with transparent black
-                                       Vector4Set(zero, 128, 128, 128, 128);
-                                       tx->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_MIPMAP | TEXF_ALPHA, zero, 1, 1);
-                                       tx->basematerialflags |= MATERIALFLAG_NOSHADOW | MATERIALFLAG_ADD | MATERIALFLAG_BLENDED | MATERIALFLAG_REFLECTION;
-                               }
-                               else if (!strncmp(tx->name,"*lava",5)
-                                || !strncmp(tx->name,"*teleport",9)
-                                || !strncmp(tx->name,"*rift",5)) // Scourge of Armagon texture
-                                       tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW;
-                               else
-                                       tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW | MATERIALFLAG_WATERALPHA | MATERIALFLAG_WATERSHADER;
-                               if (tx->skinframes[0] && tx->skinframes[0]->hasalpha)
-                                       tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
-                       }
+                       // LordHavoc: some Tenebrae textures get replaced by black
+                       if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
+                               tx->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_MIPMAP | TEXF_ALPHA, zerotrans, 1, 1, false);
                        else if (!strncmp(tx->name, "mirror", 6)) // Tenebrae
-                       {
-                               // replace the texture with black
-                               tx->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, 0, zero, 1, 1);
-                               tx->basematerialflags |= MATERIALFLAG_REFLECTION;
-                       }
-                       else if (!strncmp(tx->name, "sky", 3))
-                               tx->basematerialflags = MATERIALFLAG_SKY | MATERIALFLAG_NOSHADOW;
-                       else if (!strcmp(tx->name, "caulk"))
-                               tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
-                       else if (tx->skinframes[0] && tx->skinframes[0]->hasalpha)
-                               tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
+                               tx->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, 0, zeroopaque, 1, 1, false);
+               }
 
-                       // start out with no animation
-                       tx->currentframe = tx;
-                       tx->currentskinframe = tx->skinframes[0];
+               tx->basematerialflags = MATERIALFLAG_WALL;
+               if (tx->name[0] == '*')
+               {
+                       // LordHavoc: some turbulent textures should not be affected by wateralpha
+                       if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
+                               tx->basematerialflags |= MATERIALFLAG_NOSHADOW | MATERIALFLAG_ADD | MATERIALFLAG_BLENDED | MATERIALFLAG_REFLECTION;
+                       else if (!strncmp(tx->name,"*lava",5)
+                        || !strncmp(tx->name,"*teleport",9)
+                        || !strncmp(tx->name,"*rift",5)) // Scourge of Armagon texture
+                               tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW;
+                       else
+                               tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW | MATERIALFLAG_WATERALPHA | MATERIALFLAG_WATERSHADER;
+                       if (tx->skinframes[0] && tx->skinframes[0]->hasalpha)
+                               tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
                }
+               else if (!strncmp(tx->name, "mirror", 6)) // Tenebrae
+               {
+                       // replace the texture with black
+                       tx->basematerialflags |= MATERIALFLAG_REFLECTION;
+               }
+               else if (!strncmp(tx->name, "sky", 3))
+                       tx->basematerialflags = MATERIALFLAG_SKY | MATERIALFLAG_NOSHADOW;
+               else if (!strcmp(tx->name, "caulk"))
+                       tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
+               else if (tx->skinframes[0] && tx->skinframes[0]->hasalpha)
+                       tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
+
+               // start out with no animation
+               tx->currentframe = tx;
+               tx->currentskinframe = tx->skinframes[0];
+               tx->currentmaterialflags = tx->basematerialflags;
        }
 
        // sequence the animations
-       for (i = 0;i < m->nummiptex;i++)
+       for (i = 0;i < nummiptex;i++)
        {
                tx = loadmodel->data_textures + i;
                if (!tx || tx->name[0] != '+' || tx->name[1] == 0 || tx->name[2] == 0)
@@ -1673,7 +1907,7 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                memset(anims, 0, sizeof(anims));
                memset(altanims, 0, sizeof(altanims));
 
-               for (j = i;j < m->nummiptex;j++)
+               for (j = i;j < nummiptex;j++)
                {
                        tx2 = loadmodel->data_textures + j;
                        if (!tx2 || tx2->name[0] != '+' || strcmp(tx2->name+2, tx->name+2))
@@ -1762,7 +1996,7 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
        }
 }
 
-static void Mod_Q1BSP_LoadLighting(lump_t *l)
+static void Mod_Q1BSP_LoadLighting(sizebuf_t *sb)
 {
        int i;
        unsigned char *in, *out, *data, d;
@@ -1771,9 +2005,9 @@ static void Mod_Q1BSP_LoadLighting(lump_t *l)
        fs_offset_t filesize;
        if (loadmodel->brush.ishlbsp) // LordHavoc: load the colored lighting data straight
        {
-               loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, l->filelen);
-               for (i=0; i<l->filelen; i++)
-                       loadmodel->brushq1.lightdata[i] = mod_base[l->fileofs+i] >>= 1;
+               loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
+               for (i = 0;i < sb->cursize;i++)
+                       loadmodel->brushq1.lightdata[i] = sb->data[i] >>= 1;
        }
        else // LordHavoc: bsp version 29 (normal white lighting)
        {
@@ -1786,7 +2020,7 @@ static void Mod_Q1BSP_LoadLighting(lump_t *l)
                data = (unsigned char*) FS_LoadFile(litfilename, tempmempool, false, &filesize);
                if (data)
                {
-                       if (filesize == (fs_offset_t)(8 + l->filelen * 3) && data[0] == 'Q' && data[1] == 'L' && data[2] == 'I' && data[3] == 'T')
+                       if (filesize == (fs_offset_t)(8 + sb->cursize * 3) && data[0] == 'Q' && data[1] == 'L' && data[2] == 'I' && data[3] == 'T')
                        {
                                i = LittleLong(((int *)data)[1]);
                                if (i == 1)
@@ -1799,7 +2033,7 @@ static void Mod_Q1BSP_LoadLighting(lump_t *l)
                                        data = (unsigned char*) FS_LoadFile(dlitfilename, tempmempool, false, &filesize);
                                        if (data)
                                        {
-                                               if (filesize == (fs_offset_t)(8 + l->filelen * 3) && data[0] == 'Q' && data[1] == 'L' && data[2] == 'I' && data[3] == 'T')
+                                               if (filesize == (fs_offset_t)(8 + sb->cursize * 3) && data[0] == 'Q' && data[1] == 'L' && data[2] == 'I' && data[3] == 'T')
                                                {
                                                        i = LittleLong(((int *)data)[1]);
                                                        if (i == 1)
@@ -1823,7 +2057,7 @@ static void Mod_Q1BSP_LoadLighting(lump_t *l)
                        else if (filesize == 8)
                                Con_Print("Empty .lit file, ignoring\n");
                        else
-                               Con_Printf("Corrupt .lit file (file size %i bytes, should be %i bytes), ignoring\n", (int) filesize, (int) (8 + l->filelen * 3));
+                               Con_Printf("Corrupt .lit file (file size %i bytes, should be %i bytes), ignoring\n", (int) filesize, (int) (8 + sb->cursize * 3));
                        if (data)
                        {
                                Mem_Free(data);
@@ -1831,12 +2065,12 @@ static void Mod_Q1BSP_LoadLighting(lump_t *l)
                        }
                }
                // LordHavoc: oh well, expand the white lighting data
-               if (!l->filelen)
+               if (!sb->cursize)
                        return;
-               loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, l->filelen*3);
-               in = mod_base + l->fileofs;
+               loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize*3);
+               in = sb->data;
                out = loadmodel->brushq1.lightdata;
-               for (i = 0;i < l->filelen;i++)
+               for (i = 0;i < sb->cursize;i++)
                {
                        d = *in++;
                        *out++ = d;
@@ -1846,15 +2080,15 @@ static void Mod_Q1BSP_LoadLighting(lump_t *l)
        }
 }
 
-static void Mod_Q1BSP_LoadVisibility(lump_t *l)
+static void Mod_Q1BSP_LoadVisibility(sizebuf_t *sb)
 {
        loadmodel->brushq1.num_compressedpvs = 0;
        loadmodel->brushq1.data_compressedpvs = NULL;
-       if (!l->filelen)
+       if (!sb->cursize)
                return;
-       loadmodel->brushq1.num_compressedpvs = l->filelen;
-       loadmodel->brushq1.data_compressedpvs = (unsigned char *)Mem_Alloc(loadmodel->mempool, l->filelen);
-       memcpy(loadmodel->brushq1.data_compressedpvs, mod_base + l->fileofs, l->filelen);
+       loadmodel->brushq1.num_compressedpvs = sb->cursize;
+       loadmodel->brushq1.data_compressedpvs = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
+       MSG_ReadBytes(sb, sb->cursize, loadmodel->brushq1.data_compressedpvs);
 }
 
 // used only for HalfLife maps
@@ -1864,13 +2098,13 @@ static void Mod_Q1BSP_ParseWadsFromEntityLump(const char *data)
        int i, j, k;
        if (!data)
                return;
-       if (!COM_ParseToken_Simple(&data, false, false))
+       if (!COM_ParseToken_Simple(&data, false, false, true))
                return; // error
        if (com_token[0] != '{')
                return; // error
        while (1)
        {
-               if (!COM_ParseToken_Simple(&data, false, false))
+               if (!COM_ParseToken_Simple(&data, false, false, true))
                        return; // error
                if (com_token[0] == '}')
                        break; // end of worldspawn
@@ -1880,7 +2114,7 @@ static void Mod_Q1BSP_ParseWadsFromEntityLump(const char *data)
                        strlcpy(key, com_token, sizeof(key));
                while (key[strlen(key)-1] == ' ') // remove trailing spaces
                        key[strlen(key)-1] = 0;
-               if (!COM_ParseToken_Simple(&data, false, false))
+               if (!COM_ParseToken_Simple(&data, false, false, true))
                        return; // error
                dpsnprintf(value, sizeof(value), "%s", com_token);
                if (!strcmp("wad", key)) // for HalfLife maps
@@ -1914,78 +2148,52 @@ static void Mod_Q1BSP_ParseWadsFromEntityLump(const char *data)
        }
 }
 
-static void Mod_Q1BSP_LoadEntities(lump_t *l)
+static void Mod_Q1BSP_LoadEntities(sizebuf_t *sb)
 {
        loadmodel->brush.entities = NULL;
-       if (!l->filelen)
+       if (!sb->cursize)
                return;
-       loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, l->filelen + 1);
-       memcpy(loadmodel->brush.entities, mod_base + l->fileofs, l->filelen);
-       loadmodel->brush.entities[l->filelen] = 0;
+       loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, sb->cursize + 1);
+       MSG_ReadBytes(sb, sb->cursize, (unsigned char *)loadmodel->brush.entities);
+       loadmodel->brush.entities[sb->cursize] = 0;
        if (loadmodel->brush.ishlbsp)
                Mod_Q1BSP_ParseWadsFromEntityLump(loadmodel->brush.entities);
 }
 
 
-static void Mod_Q1BSP_LoadVertexes(lump_t *l)
+static void Mod_Q1BSP_LoadVertexes(sizebuf_t *sb)
 {
-       dvertex_t       *in;
        mvertex_t       *out;
        int                     i, count;
+       size_t          structsize = 12;
 
-       in = (dvertex_t *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
+       if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadVertexes: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
+       count = sb->cursize / structsize;
        out = (mvertex_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
 
        loadmodel->brushq1.vertexes = out;
        loadmodel->brushq1.numvertexes = count;
 
-       for ( i=0 ; i<count ; i++, in++, out++)
+       for ( i=0 ; i<count ; i++, out++)
        {
-               out->position[0] = LittleFloat(in->point[0]);
-               out->position[1] = LittleFloat(in->point[1]);
-               out->position[2] = LittleFloat(in->point[2]);
+               out->position[0] = MSG_ReadLittleFloat(sb);
+               out->position[1] = MSG_ReadLittleFloat(sb);
+               out->position[2] = MSG_ReadLittleFloat(sb);
        }
 }
 
-// The following two functions should be removed and MSG_* or SZ_* function sets adjusted so they
-// can be used for this
-// REMOVEME
-int SB_ReadInt (unsigned char **buffer)
-{
-       int     i;
-       i = ((*buffer)[0]) + 256*((*buffer)[1]) + 65536*((*buffer)[2]) + 16777216*((*buffer)[3]);
-       (*buffer) += 4;
-       return i;
-}
-
-// REMOVEME
-float SB_ReadFloat (unsigned char **buffer)
-{
-       union
-       {
-               int             i;
-               float   f;
-       } u;
-
-       u.i = SB_ReadInt (buffer);
-       return u.f;
-}
-
-static void Mod_Q1BSP_LoadSubmodels(lump_t *l, hullinfo_t *hullinfo)
+static void Mod_Q1BSP_LoadSubmodels(sizebuf_t *sb, hullinfo_t *hullinfo)
 {
-       unsigned char           *index;
-       dmodel_t        *out;
+       mmodel_t        *out;
        int                     i, j, count;
+       size_t structsize = (48+4*hullinfo->filehulls);
 
-       index = (unsigned char *)(mod_base + l->fileofs);
-       if (l->filelen % (48+4*hullinfo->filehulls))
+       if (sb->cursize % structsize)
                Host_Error ("Mod_Q1BSP_LoadSubmodels: funny lump size in %s", loadmodel->name);
 
-       count = l->filelen / (48+4*hullinfo->filehulls);
-       out = (dmodel_t *)Mem_Alloc (loadmodel->mempool, count*sizeof(*out));
+       count = sb->cursize / structsize;
+       out = (mmodel_t *)Mem_Alloc (loadmodel->mempool, count*sizeof(*out));
 
        loadmodel->brushq1.submodels = out;
        loadmodel->brush.numsubmodels = count;
@@ -1993,43 +2201,50 @@ static void Mod_Q1BSP_LoadSubmodels(lump_t *l, hullinfo_t *hullinfo)
        for (i = 0; i < count; i++, out++)
        {
        // spread out the mins / maxs by a pixel
-               out->mins[0] = SB_ReadFloat (&index) - 1;
-               out->mins[1] = SB_ReadFloat (&index) - 1;
-               out->mins[2] = SB_ReadFloat (&index) - 1;
-               out->maxs[0] = SB_ReadFloat (&index) + 1;
-               out->maxs[1] = SB_ReadFloat (&index) + 1;
-               out->maxs[2] = SB_ReadFloat (&index) + 1;
-               out->origin[0] = SB_ReadFloat (&index);
-               out->origin[1] = SB_ReadFloat (&index);
-               out->origin[2] = SB_ReadFloat (&index);
+               out->mins[0] = MSG_ReadLittleFloat(sb) - 1;
+               out->mins[1] = MSG_ReadLittleFloat(sb) - 1;
+               out->mins[2] = MSG_ReadLittleFloat(sb) - 1;
+               out->maxs[0] = MSG_ReadLittleFloat(sb) + 1;
+               out->maxs[1] = MSG_ReadLittleFloat(sb) + 1;
+               out->maxs[2] = MSG_ReadLittleFloat(sb) + 1;
+               out->origin[0] = MSG_ReadLittleFloat(sb);
+               out->origin[1] = MSG_ReadLittleFloat(sb);
+               out->origin[2] = MSG_ReadLittleFloat(sb);
                for (j = 0; j < hullinfo->filehulls; j++)
-                       out->headnode[j] = SB_ReadInt (&index);
-               out->visleafs = SB_ReadInt (&index);
-               out->firstface = SB_ReadInt (&index);
-               out->numfaces = SB_ReadInt (&index);
+                       out->headnode[j] = MSG_ReadLittleLong(sb);
+               out->visleafs  = MSG_ReadLittleLong(sb);
+               out->firstface = MSG_ReadLittleLong(sb);
+               out->numfaces  = MSG_ReadLittleLong(sb);
        }
 }
 
-static void Mod_Q1BSP_LoadEdges(lump_t *l)
+static void Mod_Q1BSP_LoadEdges(sizebuf_t *sb)
 {
-       dedge_t *in;
        medge_t *out;
        int     i, count;
+       size_t  structsize = loadmodel->brush.isbsp2 ? 8 : 4;
 
-       in = (dedge_t *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
+       if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadEdges: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
+       count = sb->cursize / structsize;
        out = (medge_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
 
        loadmodel->brushq1.edges = out;
        loadmodel->brushq1.numedges = count;
 
-       for ( i=0 ; i<count ; i++, in++, out++)
+       for ( i=0 ; i<count ; i++, out++)
        {
-               out->v[0] = (unsigned short)LittleShort(in->v[0]);
-               out->v[1] = (unsigned short)LittleShort(in->v[1]);
-               if (out->v[0] >= loadmodel->brushq1.numvertexes || out->v[1] >= loadmodel->brushq1.numvertexes)
+               if (loadmodel->brush.isbsp2)
+               {
+                       out->v[0] = (unsigned int)MSG_ReadLittleLong(sb);
+                       out->v[1] = (unsigned int)MSG_ReadLittleLong(sb);
+               }
+               else
+               {
+                       out->v[0] = (unsigned short)MSG_ReadLittleShort(sb);
+                       out->v[1] = (unsigned short)MSG_ReadLittleShort(sb);
+               }
+               if ((int)out->v[0] >= loadmodel->brushq1.numvertexes || (int)out->v[1] >= loadmodel->brushq1.numvertexes)
                {
                        Con_Printf("Mod_Q1BSP_LoadEdges: %s has invalid vertex indices in edge %i (vertices %i %i >= numvertices %i)\n", loadmodel->name, i, out->v[0], out->v[1], loadmodel->brushq1.numvertexes);
                        if(!loadmodel->brushq1.numvertexes)
@@ -2041,29 +2256,28 @@ static void Mod_Q1BSP_LoadEdges(lump_t *l)
        }
 }
 
-static void Mod_Q1BSP_LoadTexinfo(lump_t *l)
+static void Mod_Q1BSP_LoadTexinfo(sizebuf_t *sb)
 {
-       texinfo_t *in;
        mtexinfo_t *out;
        int i, j, k, count, miptex;
+       size_t structsize = 40;
 
-       in = (texinfo_t *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
+       if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
+       count = sb->cursize / structsize;
        out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
 
        loadmodel->brushq1.texinfo = out;
        loadmodel->brushq1.numtexinfo = count;
 
-       for (i = 0;i < count;i++, in++, out++)
+       for (i = 0;i < count;i++, out++)
        {
                for (k = 0;k < 2;k++)
                        for (j = 0;j < 4;j++)
-                               out->vecs[k][j] = LittleFloat(in->vecs[k][j]);
+                               out->vecs[k][j] = MSG_ReadLittleFloat(sb);
 
-               miptex = LittleLong(in->miptex);
-               out->flags = LittleLong(in->flags);
+               miptex = MSG_ReadLittleLong(sb);
+               out->flags = MSG_ReadLittleLong(sb);
 
                out->texture = NULL;
                if (loadmodel->data_textures)
@@ -2242,18 +2456,18 @@ static void Mod_Q1BSP_GenerateWarpMesh(msurface_t *surface)
 #endif
 
 extern cvar_t gl_max_lightmapsize;
-static void Mod_Q1BSP_LoadFaces(lump_t *l)
+static void Mod_Q1BSP_LoadFaces(sizebuf_t *sb)
 {
-       dface_t *in;
        msurface_t *surface;
-       int i, j, count, surfacenum, planenum, smax, tmax, ssize, tsize, firstedge, numedges, totalverts, totaltris, lightmapnumber, lightmapsize, totallightmapsamples;
+       int i, j, count, surfacenum, planenum, smax, tmax, ssize, tsize, firstedge, numedges, totalverts, totaltris, lightmapnumber, lightmapsize, totallightmapsamples, lightmapoffset, texinfoindex;
        float texmins[2], texmaxs[2], val;
        rtexture_t *lightmaptexture, *deluxemaptexture;
+       char vabuf[1024];
+       size_t structsize = loadmodel->brush.isbsp2 ? 28 : 20;
 
-       in = (dface_t *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
+       if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadFaces: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
+       count = sb->cursize / structsize;
        loadmodel->data_surfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_t));
        loadmodel->data_surfaces_lightmapinfo = (msurface_lightmapinfo_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(msurface_lightmapinfo_t));
 
@@ -2264,9 +2478,12 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
 
        totalverts = 0;
        totaltris = 0;
-       for (surfacenum = 0, in = (dface_t *)(mod_base + l->fileofs);surfacenum < count;surfacenum++, in++)
+       for (surfacenum = 0;surfacenum < count;surfacenum++)
        {
-               numedges = (unsigned short)LittleShort(in->numedges);
+               if (loadmodel->brush.isbsp2)
+                       numedges = BuffLittleLong(sb->data + structsize * surfacenum + 12);
+               else
+                       numedges = BuffLittleShort(sb->data + structsize * surfacenum + 8);
                totalverts += numedges;
                totaltris += numedges - 2;
        }
@@ -2281,25 +2498,29 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
 
        totalverts = 0;
        totaltris = 0;
-       for (surfacenum = 0, in = (dface_t *)(mod_base + l->fileofs), surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, in++, surface++)
+       for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
        {
                surface->lightmapinfo = loadmodel->data_surfaces_lightmapinfo + surfacenum;
+               planenum = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
+               /*side = */loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
+               firstedge = MSG_ReadLittleLong(sb);
+               numedges = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
+               texinfoindex = loadmodel->brush.isbsp2 ? MSG_ReadLittleLong(sb) : (unsigned short)MSG_ReadLittleShort(sb);
+               for (i = 0;i < MAXLIGHTMAPS;i++)
+                       surface->lightmapinfo->styles[i] = MSG_ReadByte(sb);
+               lightmapoffset = MSG_ReadLittleLong(sb);
 
                // FIXME: validate edges, texinfo, etc?
-               firstedge = LittleLong(in->firstedge);
-               numedges = (unsigned short)LittleShort(in->numedges);
                if ((unsigned int) firstedge > (unsigned int) loadmodel->brushq1.numsurfedges || (unsigned int) numedges > (unsigned int) loadmodel->brushq1.numsurfedges || (unsigned int) firstedge + (unsigned int) numedges > (unsigned int) loadmodel->brushq1.numsurfedges)
                        Host_Error("Mod_Q1BSP_LoadFaces: invalid edge range (firstedge %i, numedges %i, model edges %i)", firstedge, numedges, loadmodel->brushq1.numsurfedges);
-               i = (unsigned short)LittleShort(in->texinfo);
-               if ((unsigned int) i >= (unsigned int) loadmodel->brushq1.numtexinfo)
-                       Host_Error("Mod_Q1BSP_LoadFaces: invalid texinfo index %i(model has %i texinfos)", i, loadmodel->brushq1.numtexinfo);
-               surface->lightmapinfo->texinfo = loadmodel->brushq1.texinfo + i;
-               surface->texture = surface->lightmapinfo->texinfo->texture;
-
-               planenum = (unsigned short)LittleShort(in->planenum);
+               if ((unsigned int) texinfoindex >= (unsigned int) loadmodel->brushq1.numtexinfo)
+                       Host_Error("Mod_Q1BSP_LoadFaces: invalid texinfo index %i(model has %i texinfos)", texinfoindex, loadmodel->brushq1.numtexinfo);
                if ((unsigned int) planenum >= (unsigned int) loadmodel->brush.num_planes)
                        Host_Error("Mod_Q1BSP_LoadFaces: invalid plane index %i (model has %i planes)", planenum, loadmodel->brush.num_planes);
 
+               surface->lightmapinfo->texinfo = loadmodel->brushq1.texinfo + texinfoindex;
+               surface->texture = surface->lightmapinfo->texinfo->texture;
+
                //surface->flags = surface->texture->flags;
                //if (LittleShort(in->side))
                //      surface->flags |= SURF_PLANEBACK;
@@ -2339,8 +2560,8 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                }
 
                // compile additional data about the surface geometry
-               Mod_BuildNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_normal3f, true);
-               Mod_BuildTextureVectorsFromNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, true);
+               Mod_BuildNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
+               Mod_BuildTextureVectorsFromNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
                BoxFromPoints(surface->mins, surface->maxs, surface->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex));
 
                // generate surface extents information
@@ -2367,12 +2588,9 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
 
                // lighting info
-               for (i = 0;i < MAXLIGHTMAPS;i++)
-                       surface->lightmapinfo->styles[i] = in->styles[i];
                surface->lightmaptexture = NULL;
                surface->deluxemaptexture = r_texture_blanknormalmap;
-               i = LittleLong(in->lightofs);
-               if (i == -1)
+               if (lightmapoffset == -1)
                {
                        surface->lightmapinfo->samples = NULL;
 #if 1
@@ -2386,12 +2604,12 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
 #endif
                }
                else if (loadmodel->brush.ishlbsp) // LordHavoc: HalfLife map (bsp version 30)
-                       surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + i;
+                       surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + lightmapoffset;
                else // LordHavoc: white lighting (bsp version 29)
                {
-                       surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + (i * 3);
+                       surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + (lightmapoffset * 3);
                        if (loadmodel->brushq1.nmaplightdata)
-                               surface->lightmapinfo->nmapsamples = loadmodel->brushq1.nmaplightdata + (i * 3);
+                               surface->lightmapinfo->nmapsamples = loadmodel->brushq1.nmaplightdata + (lightmapoffset * 3);
                }
 
                // check if we should apply a lightmap to this
@@ -2413,6 +2631,7 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                        // lightmap is needed on this surface (rather than duplicating the
                        // logic above)
                        loadmodel->brushq1.lightmapupdateflags[surfacenum] = true;
+                       loadmodel->lit = true;
                }
        }
 
@@ -2454,11 +2673,11 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                                        loadmodel->texturepool = R_AllocTexturePool();
                                // could not find room, make a new lightmap
                                loadmodel->brushq3.num_mergedlightmaps = lightmapnumber + 1;
-                               loadmodel->brushq3.data_lightmaps = Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_lightmaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_lightmaps[0]));
-                               loadmodel->brushq3.data_deluxemaps = Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_deluxemaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_deluxemaps[0]));
-                               loadmodel->brushq3.data_lightmaps[lightmapnumber] = lightmaptexture = R_LoadTexture2D(loadmodel->texturepool, va("lightmap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, NULL);
+                               loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_lightmaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_lightmaps[0]));
+                               loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_deluxemaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_deluxemaps[0]));
+                               loadmodel->brushq3.data_lightmaps[lightmapnumber] = lightmaptexture = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "lightmap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, -1, NULL);
                                if (loadmodel->brushq1.nmaplightdata)
-                                       loadmodel->brushq3.data_deluxemaps[lightmapnumber] = deluxemaptexture = R_LoadTexture2D(loadmodel->texturepool, va("deluxemap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, NULL);
+                                       loadmodel->brushq3.data_deluxemaps[lightmapnumber] = deluxemaptexture = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "deluxemap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, -1, NULL);
                                lightmapnumber++;
                                Mod_AllocLightmap_Reset(&allocState);
                                Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy);
@@ -2548,34 +2767,72 @@ static void Mod_Q1BSP_LoadNodes_RecursiveSetParent(mnode_t *node, mnode_t *paren
        }
 }
 
-static void Mod_Q1BSP_LoadNodes(lump_t *l)
+static void Mod_Q1BSP_LoadNodes(sizebuf_t *sb)
 {
-       int                     i, j, count, p;
-       dnode_t         *in;
+       int                     i, j, count, p, child[2];
        mnode_t         *out;
+       size_t structsize = loadmodel->brush.isbsp2rmqe ? 32 : (loadmodel->brush.isbsp2 ? 44 : 24);
 
-       in = (dnode_t *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
+       if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadNodes: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
+       count = sb->cursize / structsize;
+       if (count == 0)
+               Host_Error("Mod_Q1BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
        out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
 
        loadmodel->brush.data_nodes = out;
        loadmodel->brush.num_nodes = count;
 
-       for ( i=0 ; i<count ; i++, in++, out++)
+       for ( i=0 ; i<count ; i++, out++)
        {
-               for (j=0 ; j<3 ; j++)
-               {
-                       out->mins[j] = LittleShort(in->mins[j]);
-                       out->maxs[j] = LittleShort(in->maxs[j]);
+               p = MSG_ReadLittleLong(sb);
+               out->plane = loadmodel->brush.data_planes + p;
+
+               if (loadmodel->brush.isbsp2rmqe)
+               {
+                       child[0] = MSG_ReadLittleLong(sb);
+                       child[1] = MSG_ReadLittleLong(sb);
+                       out->mins[0] = MSG_ReadLittleShort(sb);
+                       out->mins[1] = MSG_ReadLittleShort(sb);
+                       out->mins[2] = MSG_ReadLittleShort(sb);
+                       out->maxs[0] = MSG_ReadLittleShort(sb);
+                       out->maxs[1] = MSG_ReadLittleShort(sb);
+                       out->maxs[2] = MSG_ReadLittleShort(sb);
+                       out->firstsurface = MSG_ReadLittleLong(sb);
+                       out->numsurfaces = MSG_ReadLittleLong(sb);
+               }
+               else if (loadmodel->brush.isbsp2)
+               {
+                       child[0] = MSG_ReadLittleLong(sb);
+                       child[1] = MSG_ReadLittleLong(sb);
+                       out->mins[0] = MSG_ReadLittleFloat(sb);
+                       out->mins[1] = MSG_ReadLittleFloat(sb);
+                       out->mins[2] = MSG_ReadLittleFloat(sb);
+                       out->maxs[0] = MSG_ReadLittleFloat(sb);
+                       out->maxs[1] = MSG_ReadLittleFloat(sb);
+                       out->maxs[2] = MSG_ReadLittleFloat(sb);
+                       out->firstsurface = MSG_ReadLittleLong(sb);
+                       out->numsurfaces = MSG_ReadLittleLong(sb);
                }
+               else
+               {
+                       child[0] = (unsigned short)MSG_ReadLittleShort(sb);
+                       child[1] = (unsigned short)MSG_ReadLittleShort(sb);
+                       if (child[0] >= count)
+                               child[0] -= 65536;
+                       if (child[1] >= count)
+                               child[1] -= 65536;
 
-               p = LittleLong(in->planenum);
-               out->plane = loadmodel->brush.data_planes + p;
+                       out->mins[0] = MSG_ReadLittleShort(sb);
+                       out->mins[1] = MSG_ReadLittleShort(sb);
+                       out->mins[2] = MSG_ReadLittleShort(sb);
+                       out->maxs[0] = MSG_ReadLittleShort(sb);
+                       out->maxs[1] = MSG_ReadLittleShort(sb);
+                       out->maxs[2] = MSG_ReadLittleShort(sb);
 
-               out->firstsurface = (unsigned short)LittleShort(in->firstface);
-               out->numsurfaces = (unsigned short)LittleShort(in->numfaces);
+                       out->firstsurface = (unsigned short)MSG_ReadLittleShort(sb);
+                       out->numsurfaces = (unsigned short)MSG_ReadLittleShort(sb);
+               }
 
                for (j=0 ; j<2 ; j++)
                {
@@ -2583,8 +2840,8 @@ static void Mod_Q1BSP_LoadNodes(lump_t *l)
                        // arguire qbsp which can produce more than 32768 nodes, any value
                        // below count is assumed to be a node number, any other value is
                        // assumed to be a leaf number
-                       p = (unsigned short)LittleShort(in->children[j]);
-                       if (p < count)
+                       p = child[j];
+                       if (p >= 0)
                        {
                                if (p < loadmodel->brush.num_nodes)
                                        out->children[j] = loadmodel->brush.data_nodes + p;
@@ -2597,8 +2854,8 @@ static void Mod_Q1BSP_LoadNodes(lump_t *l)
                        }
                        else
                        {
-                               // note this uses 65535 intentionally, -1 is leaf 0
-                               p = 65535 - p;
+                               // get leaf index as a positive value starting at 0 (-1 becomes 0, -2 becomes 1, etc)
+                               p = -(p+1);
                                if (p < loadmodel->brush.num_leafs)
                                        out->children[j] = (mnode_t *)(loadmodel->brush.data_leafs + p);
                                else
@@ -2614,16 +2871,15 @@ static void Mod_Q1BSP_LoadNodes(lump_t *l)
        Mod_Q1BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);      // sets nodes and leafs
 }
 
-static void Mod_Q1BSP_LoadLeafs(lump_t *l)
+static void Mod_Q1BSP_LoadLeafs(sizebuf_t *sb)
 {
-       dleaf_t *in;
        mleaf_t *out;
-       int i, j, count, p;
+       int i, j, count, p, firstmarksurface, nummarksurfaces;
+       size_t structsize = loadmodel->brush.isbsp2rmqe ? 32 : (loadmodel->brush.isbsp2 ? 44 : 28);
 
-       in = (dleaf_t *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
+       if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
+       count = sb->cursize / structsize;
        out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
 
        loadmodel->brush.data_leafs = out;
@@ -2634,32 +2890,16 @@ static void Mod_Q1BSP_LoadLeafs(lump_t *l)
        loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_pvsclusters * loadmodel->brush.num_pvsclusterbytes);
        memset(loadmodel->brush.data_pvsclusters, 0xFF, loadmodel->brush.num_pvsclusters * loadmodel->brush.num_pvsclusterbytes);
 
-       for ( i=0 ; i<count ; i++, in++, out++)
+       // FIXME: this function could really benefit from some error checking
+       for ( i=0 ; i<count ; i++, out++)
        {
-               for (j=0 ; j<3 ; j++)
-               {
-                       out->mins[j] = LittleShort(in->mins[j]);
-                       out->maxs[j] = LittleShort(in->maxs[j]);
-               }
-
-               // FIXME: this function could really benefit from some error checking
-
-               out->contents = LittleLong(in->contents);
-
-               out->firstleafsurface = loadmodel->brush.data_leafsurfaces + (unsigned short)LittleShort(in->firstmarksurface);
-               out->numleafsurfaces = (unsigned short)LittleShort(in->nummarksurfaces);
-               if ((unsigned short)LittleShort(in->firstmarksurface) + out->numleafsurfaces > loadmodel->brush.num_leafsurfaces)
-               {
-                       Con_Printf("Mod_Q1BSP_LoadLeafs: invalid leafsurface range %i:%i outside range %i:%i\n", (int)(out->firstleafsurface - loadmodel->brush.data_leafsurfaces), (int)(out->firstleafsurface + out->numleafsurfaces - loadmodel->brush.data_leafsurfaces), 0, loadmodel->brush.num_leafsurfaces);
-                       out->firstleafsurface = NULL;
-                       out->numleafsurfaces = 0;
-               }
+               out->contents = MSG_ReadLittleLong(sb);
 
                out->clusterindex = i - 1;
                if (out->clusterindex >= loadmodel->brush.num_pvsclusters)
                        out->clusterindex = -1;
 
-               p = LittleLong(in->visofs);
+               p = MSG_ReadLittleLong(sb);
                // ignore visofs errors on leaf 0 (solid)
                if (p >= 0 && out->clusterindex >= 0)
                {
@@ -2669,14 +2909,61 @@ static void Mod_Q1BSP_LoadLeafs(lump_t *l)
                                Mod_Q1BSP_DecompressVis(loadmodel->brushq1.data_compressedpvs + p, loadmodel->brushq1.data_compressedpvs + loadmodel->brushq1.num_compressedpvs, loadmodel->brush.data_pvsclusters + out->clusterindex * loadmodel->brush.num_pvsclusterbytes, loadmodel->brush.data_pvsclusters + (out->clusterindex + 1) * loadmodel->brush.num_pvsclusterbytes);
                }
 
-               for (j = 0;j < 4;j++)
-                       out->ambient_sound_level[j] = in->ambient_level[j];
+               if (loadmodel->brush.isbsp2rmqe)
+               {
+                       out->mins[0] = MSG_ReadLittleShort(sb);
+                       out->mins[1] = MSG_ReadLittleShort(sb);
+                       out->mins[2] = MSG_ReadLittleShort(sb);
+                       out->maxs[0] = MSG_ReadLittleShort(sb);
+                       out->maxs[1] = MSG_ReadLittleShort(sb);
+                       out->maxs[2] = MSG_ReadLittleShort(sb);
+       
+                       firstmarksurface = MSG_ReadLittleLong(sb);
+                       nummarksurfaces = MSG_ReadLittleLong(sb);
+               }
+               else if (loadmodel->brush.isbsp2)
+               {
+                       out->mins[0] = MSG_ReadLittleFloat(sb);
+                       out->mins[1] = MSG_ReadLittleFloat(sb);
+                       out->mins[2] = MSG_ReadLittleFloat(sb);
+                       out->maxs[0] = MSG_ReadLittleFloat(sb);
+                       out->maxs[1] = MSG_ReadLittleFloat(sb);
+                       out->maxs[2] = MSG_ReadLittleFloat(sb);
+       
+                       firstmarksurface = MSG_ReadLittleLong(sb);
+                       nummarksurfaces = MSG_ReadLittleLong(sb);
+               }
+               else
+               {
+                       out->mins[0] = MSG_ReadLittleShort(sb);
+                       out->mins[1] = MSG_ReadLittleShort(sb);
+                       out->mins[2] = MSG_ReadLittleShort(sb);
+                       out->maxs[0] = MSG_ReadLittleShort(sb);
+                       out->maxs[1] = MSG_ReadLittleShort(sb);
+                       out->maxs[2] = MSG_ReadLittleShort(sb);
+       
+                       firstmarksurface = (unsigned short)MSG_ReadLittleShort(sb);
+                       nummarksurfaces  = (unsigned short)MSG_ReadLittleShort(sb);
+               }
+
+               if (firstmarksurface >= 0 && firstmarksurface + nummarksurfaces <= loadmodel->brush.num_leafsurfaces)
+               {
+                       out->firstleafsurface = loadmodel->brush.data_leafsurfaces + firstmarksurface;
+                       out->numleafsurfaces = nummarksurfaces;
+               }
+               else
+               {
+                       Con_Printf("Mod_Q1BSP_LoadLeafs: invalid leafsurface range %i:%i outside range %i:%i\n", firstmarksurface, firstmarksurface+nummarksurfaces, 0, loadmodel->brush.num_leafsurfaces);
+                       out->firstleafsurface = NULL;
+                       out->numleafsurfaces = 0;
+               }
 
-               // FIXME: Insert caustics here
+               for (j = 0;j < 4;j++)
+                       out->ambient_sound_level[j] = MSG_ReadByte(sb);
        }
 }
 
-qboolean Mod_Q1BSP_CheckWaterAlphaSupport(void)
+static qboolean Mod_Q1BSP_CheckWaterAlphaSupport(void)
 {
        int i, j;
        mleaf_t *leaf;
@@ -2699,17 +2986,16 @@ qboolean Mod_Q1BSP_CheckWaterAlphaSupport(void)
        return false;
 }
 
-static void Mod_Q1BSP_LoadClipnodes(lump_t *l, hullinfo_t *hullinfo)
+static void Mod_Q1BSP_LoadClipnodes(sizebuf_t *sb, hullinfo_t *hullinfo)
 {
-       dclipnode_t *in;
        mclipnode_t *out;
        int                     i, count;
        hull_t          *hull;
+       size_t structsize = loadmodel->brush.isbsp2 ? 12 : 8;
 
-       in = (dclipnode_t *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
+       if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadClipnodes: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
+       count = sb->cursize / structsize;
        out = (mclipnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
 
        loadmodel->brushq1.clipnodes = out;
@@ -2731,18 +3017,30 @@ static void Mod_Q1BSP_LoadClipnodes(lump_t *l, hullinfo_t *hullinfo)
                VectorSubtract(hull->clip_maxs, hull->clip_mins, hull->clip_size);
        }
 
-       for (i=0 ; i<count ; i++, out++, in++)
+       for (i=0 ; i<count ; i++, out++)
        {
-               out->planenum = LittleLong(in->planenum);
-               // LordHavoc: this code supports arguire qbsp's broken clipnodes indices (more than 32768 clipnodes), values above count are assumed to be contents values
-               out->children[0] = (unsigned short)LittleShort(in->children[0]);
-               out->children[1] = (unsigned short)LittleShort(in->children[1]);
-               if (out->children[0] >= count)
-                       out->children[0] -= 65536;
-               if (out->children[1] >= count)
-                       out->children[1] -= 65536;
+               out->planenum = MSG_ReadLittleLong(sb);
                if (out->planenum < 0 || out->planenum >= loadmodel->brush.num_planes)
-                       Host_Error("Corrupt clipping hull(out of range planenum)");
+                       Host_Error("%s: Corrupt clipping hull(out of range planenum)", loadmodel->name);
+               if (loadmodel->brush.isbsp2)
+               {
+                       out->children[0] = MSG_ReadLittleLong(sb);
+                       out->children[1] = MSG_ReadLittleLong(sb);
+                       if (out->children[0] >= count)
+                               Host_Error("%s: Corrupt clipping hull (invalid child index)", loadmodel->name);
+                       if (out->children[1] >= count)
+                               Host_Error("%s: Corrupt clipping hull (invalid child index)", loadmodel->name);
+               }
+               else
+               {
+                       // LordHavoc: this code supports arguire qbsp's broken clipnodes indices (more than 32768 clipnodes), values above count are assumed to be contents values
+                       out->children[0] = (unsigned short)MSG_ReadLittleShort(sb);
+                       out->children[1] = (unsigned short)MSG_ReadLittleShort(sb);
+                       if (out->children[0] >= count)
+                               out->children[0] -= 65536;
+                       if (out->children[1] >= count)
+                               out->children[1] -= 65536;
+               }
        }
 }
 
@@ -2772,62 +3070,71 @@ static void Mod_Q1BSP_MakeHull0(void)
        }
 }
 
-static void Mod_Q1BSP_LoadLeaffaces(lump_t *l)
+static void Mod_Q1BSP_LoadLeaffaces(sizebuf_t *sb)
 {
        int i, j;
-       short *in;
+       size_t structsize = loadmodel->brush.isbsp2 ? 4 : 2;
 
-       in = (short *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
+       if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadLeaffaces: funny lump size in %s",loadmodel->name);
-       loadmodel->brush.num_leafsurfaces = l->filelen / sizeof(*in);
+       loadmodel->brush.num_leafsurfaces = sb->cursize / structsize;
        loadmodel->brush.data_leafsurfaces = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafsurfaces * sizeof(int));
 
-       for (i = 0;i < loadmodel->brush.num_leafsurfaces;i++)
+       if (loadmodel->brush.isbsp2)
+       {
+               for (i = 0;i < loadmodel->brush.num_leafsurfaces;i++)
+               {
+                       j = MSG_ReadLittleLong(sb);
+                       if (j < 0 || j >= loadmodel->num_surfaces)
+                               Host_Error("Mod_Q1BSP_LoadLeaffaces: bad surface number");
+                       loadmodel->brush.data_leafsurfaces[i] = j;
+               }
+       }
+       else
        {
-               j = (unsigned short) LittleShort(in[i]);
-               if (j >= loadmodel->num_surfaces)
-                       Host_Error("Mod_Q1BSP_LoadLeaffaces: bad surface number");
-               loadmodel->brush.data_leafsurfaces[i] = j;
+               for (i = 0;i < loadmodel->brush.num_leafsurfaces;i++)
+               {
+                       j = (unsigned short) MSG_ReadLittleShort(sb);
+                       if (j >= loadmodel->num_surfaces)
+                               Host_Error("Mod_Q1BSP_LoadLeaffaces: bad surface number");
+                       loadmodel->brush.data_leafsurfaces[i] = j;
+               }
        }
 }
 
-static void Mod_Q1BSP_LoadSurfedges(lump_t *l)
+static void Mod_Q1BSP_LoadSurfedges(sizebuf_t *sb)
 {
        int             i;
-       int             *in;
+       size_t structsize = 4;
 
-       in = (int *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
+       if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadSurfedges: funny lump size in %s",loadmodel->name);
-       loadmodel->brushq1.numsurfedges = l->filelen / sizeof(*in);
+       loadmodel->brushq1.numsurfedges = sb->cursize / structsize;
        loadmodel->brushq1.surfedges = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brushq1.numsurfedges * sizeof(int));
 
        for (i = 0;i < loadmodel->brushq1.numsurfedges;i++)
-               loadmodel->brushq1.surfedges[i] = LittleLong(in[i]);
+               loadmodel->brushq1.surfedges[i] = MSG_ReadLittleLong(sb);
 }
 
 
-static void Mod_Q1BSP_LoadPlanes(lump_t *l)
+static void Mod_Q1BSP_LoadPlanes(sizebuf_t *sb)
 {
        int                     i;
        mplane_t        *out;
-       dplane_t        *in;
+       size_t structsize = 20;
 
-       in = (dplane_t *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
+       if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadPlanes: funny lump size in %s", loadmodel->name);
-
-       loadmodel->brush.num_planes = l->filelen / sizeof(*in);
+       loadmodel->brush.num_planes = sb->cursize / structsize;
        loadmodel->brush.data_planes = out = (mplane_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_planes * sizeof(*out));
 
-       for (i = 0;i < loadmodel->brush.num_planes;i++, in++, out++)
+       for (i = 0;i < loadmodel->brush.num_planes;i++, out++)
        {
-               out->normal[0] = LittleFloat(in->normal[0]);
-               out->normal[1] = LittleFloat(in->normal[1]);
-               out->normal[2] = LittleFloat(in->normal[2]);
-               out->dist = LittleFloat(in->dist);
-
+               out->normal[0] = MSG_ReadLittleFloat(sb);
+               out->normal[1] = MSG_ReadLittleFloat(sb);
+               out->normal[2] = MSG_ReadLittleFloat(sb);
+               out->dist = MSG_ReadLittleFloat(sb);
+               MSG_ReadLittleLong(sb); // type is not used, we use PlaneClassify
                PlaneClassify(out);
        }
 }
@@ -2846,12 +3153,12 @@ static void Mod_Q1BSP_LoadMapBrushes(void)
        if (!maptext)
                return;
        text = maptext;
-       if (!COM_ParseToken_Simple(&data, false, false))
+       if (!COM_ParseToken_Simple(&data, false, false, true))
                return; // error
        submodel = 0;
        for (;;)
        {
-               if (!COM_ParseToken_Simple(&data, false, false))
+               if (!COM_ParseToken_Simple(&data, false, false, true))
                        break;
                if (com_token[0] != '{')
                        return; // error
@@ -2862,7 +3169,7 @@ static void Mod_Q1BSP_LoadMapBrushes(void)
                brushes = Mem_Alloc(loadmodel->mempool, maxbrushes * sizeof(mbrush_t));
                for (;;)
                {
-                       if (!COM_ParseToken_Simple(&data, false, false))
+                       if (!COM_ParseToken_Simple(&data, false, false, true))
                                return; // error
                        if (com_token[0] == '}')
                                break; // end of entity
@@ -2886,7 +3193,7 @@ static void Mod_Q1BSP_LoadMapBrushes(void)
                                }
                                for (;;)
                                {
-                                       if (!COM_ParseToken_Simple(&data, false, false))
+                                       if (!COM_ParseToken_Simple(&data, false, false, true))
                                                return; // error
                                        if (com_token[0] == '}')
                                                break; // end of brush
@@ -2895,25 +3202,25 @@ static void Mod_Q1BSP_LoadMapBrushes(void)
                                        // FIXME: support hl .map format
                                        for (pointnum = 0;pointnum < 3;pointnum++)
                                        {
-                                               COM_ParseToken_Simple(&data, false, false);
+                                               COM_ParseToken_Simple(&data, false, false, true);
                                                for (componentnum = 0;componentnum < 3;componentnum++)
                                                {
-                                                       COM_ParseToken_Simple(&data, false, false);
+                                                       COM_ParseToken_Simple(&data, false, false, true);
                                                        point[pointnum][componentnum] = atof(com_token);
                                                }
-                                               COM_ParseToken_Simple(&data, false, false);
+                                               COM_ParseToken_Simple(&data, false, false, true);
                                        }
-                                       COM_ParseToken_Simple(&data, false, false);
+                                       COM_ParseToken_Simple(&data, false, false, true);
                                        strlcpy(facetexture, com_token, sizeof(facetexture));
-                                       COM_ParseToken_Simple(&data, false, false);
+                                       COM_ParseToken_Simple(&data, false, false, true);
                                        //scroll_s = atof(com_token);
-                                       COM_ParseToken_Simple(&data, false, false);
+                                       COM_ParseToken_Simple(&data, false, false, true);
                                        //scroll_t = atof(com_token);
-                                       COM_ParseToken_Simple(&data, false, false);
+                                       COM_ParseToken_Simple(&data, false, false, true);
                                        //rotate = atof(com_token);
-                                       COM_ParseToken_Simple(&data, false, false);
+                                       COM_ParseToken_Simple(&data, false, false, true);
                                        //scale_s = atof(com_token);
-                                       COM_ParseToken_Simple(&data, false, false);
+                                       COM_ParseToken_Simple(&data, false, false, true);
                                        //scale_t = atof(com_token);
                                        TriangleNormal(point[0], point[1], point[2], planenormal);
                                        VectorNormalizeDouble(planenormal);
@@ -3182,7 +3489,7 @@ static void Mod_Q1BSP_RecursiveNodePortals(mnode_t *node)
        if (portalpointsbuffersize < portalpointsbufferoffset + 6*MAX_PORTALPOINTS)
        {
                portalpointsbuffersize = portalpointsbufferoffset * 2;
-               portalpointsbuffer = Mem_Realloc(loadmodel->mempool, portalpointsbuffer, portalpointsbuffersize * sizeof(*portalpointsbuffer));
+               portalpointsbuffer = (double *)Mem_Realloc(loadmodel->mempool, portalpointsbuffer, portalpointsbuffersize * sizeof(*portalpointsbuffer));
        }
        frontpoints = portalpointsbuffer + portalpointsbufferoffset;
        portalpointsbufferoffset += 3*MAX_PORTALPOINTS;
@@ -3204,7 +3511,7 @@ static void Mod_Q1BSP_RecursiveNodePortals(mnode_t *node)
        // TODO: calculate node bounding boxes during recursion and calculate a maximum plane size accordingly to improve precision (as most maps do not need 1 billion unit plane polygons)
        PolygonD_QuadForPlane(nodeportal->points, nodeportal->plane.normal[0], nodeportal->plane.normal[1], nodeportal->plane.normal[2], nodeportal->plane.dist, 1024.0*1024.0*1024.0);
        nodeportal->numpoints = 4;
-       side = 0;       // shut up compiler warning
+       // side = 0;    // shut up compiler warning -> should be no longer needed, Host_Error is declared noreturn now
        for (portal = (portal_t *)node->portals;portal;portal = portal->next[side])
        {
                clipplane = portal->plane;
@@ -3219,7 +3526,10 @@ static void Mod_Q1BSP_RecursiveNodePortals(mnode_t *node)
                        side = 1;
                }
                else
+               {
                        Host_Error("Mod_Q1BSP_RecursiveNodePortals: mislinked portal");
+                       side = 0; // hush warning
+               }
 
                for (i = 0;i < nodeportal->numpoints*3;i++)
                        frontpoints[i] = nodeportal->points[i];
@@ -3252,7 +3562,10 @@ static void Mod_Q1BSP_RecursiveNodePortals(mnode_t *node)
                else if (portal->nodes[1] == node)
                        side = 1;
                else
+               {
                        Host_Error("Mod_Q1BSP_RecursiveNodePortals: mislinked portal");
+                       side = 0; // hush warning
+               }
                nextportal = portal->next[side];
                if (!portal->numpoints)
                        continue;
@@ -3315,7 +3628,7 @@ static void Mod_Q1BSP_MakePortals(void)
        Mem_ExpandableArray_NewArray(&portalarray, loadmodel->mempool, sizeof(portal_t), 1020*1024/sizeof(portal_t));
        portalpointsbufferoffset = 0;
        portalpointsbuffersize = 6*MAX_PORTALPOINTS*128;
-       portalpointsbuffer = Mem_Alloc(loadmodel->mempool, portalpointsbuffersize * sizeof(*portalpointsbuffer));
+       portalpointsbuffer = (double *)Mem_Alloc(loadmodel->mempool, portalpointsbuffersize * sizeof(*portalpointsbuffer));
        Mod_Q1BSP_RecursiveNodePortals(loadmodel->brush.data_nodes + loadmodel->brushq1.hulls[0].firstclipnode);
        Mem_Free(portalpointsbuffer);
        portalpointsbuffer = NULL;
@@ -3371,7 +3684,7 @@ static int Mod_Q1BSP_FatPVS(dp_model_t *model, const vec3_t org, vec_t radius, u
 {
        int bytes = model->brush.num_pvsclusterbytes;
        bytes = min(bytes, pvsbufferlength);
-       if (r_novis.integer || !model->brush.num_pvsclusters || !Mod_Q1BSP_GetPVS(model, org))
+       if (r_novis.integer || r_trippy.integer || !model->brush.num_pvsclusters || !Mod_Q1BSP_GetPVS(model, org))
        {
                memset(pvsbuffer, 0xFF, bytes);
                return bytes;
@@ -3415,37 +3728,82 @@ static void Mod_Q1BSP_RoundUpToHullSize(dp_model_t *cmodel, const vec3_t inmins,
        VectorAdd(inmins, hull->clip_size, outmaxs);
 }
 
+static int Mod_Q1BSP_CreateShadowMesh(dp_model_t *mod)
+{
+       int j;
+       int numshadowmeshtriangles = 0;
+       msurface_t *surface;
+       if (cls.state == ca_dedicated)
+               return 0;
+       // make a single combined shadow mesh to allow optimized shadow volume creation
+
+       for (j = 0, surface = mod->data_surfaces;j < mod->num_surfaces;j++, surface++)
+       {
+               surface->num_firstshadowmeshtriangle = numshadowmeshtriangles;
+               numshadowmeshtriangles += surface->num_triangles;
+       }
+       mod->brush.shadowmesh = Mod_ShadowMesh_Begin(mod->mempool, numshadowmeshtriangles * 3, numshadowmeshtriangles, NULL, NULL, NULL, false, false, true);
+       for (j = 0, surface = mod->data_surfaces;j < mod->num_surfaces;j++, surface++)
+               if (surface->num_triangles > 0)
+                       Mod_ShadowMesh_AddMesh(mod->mempool, mod->brush.shadowmesh, NULL, NULL, NULL, mod->surfmesh.data_vertex3f, NULL, NULL, NULL, NULL, surface->num_triangles, (mod->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
+       mod->brush.shadowmesh = Mod_ShadowMesh_Finish(mod->mempool, mod->brush.shadowmesh, false, r_enableshadowvolumes.integer != 0, false);
+       if (mod->brush.shadowmesh && mod->brush.shadowmesh->neighbor3i)
+               Mod_BuildTriangleNeighbors(mod->brush.shadowmesh->neighbor3i, mod->brush.shadowmesh->element3i, mod->brush.shadowmesh->numtriangles);
+
+       return numshadowmeshtriangles;
+}
+
+void Mod_CollisionBIH_TraceLineAgainstSurfaces(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask);
+
 void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
        int i, j, k;
-       dheader_t *header;
-       dmodel_t *bm;
+       sizebuf_t lumpsb[HEADER_LUMPS];
+       mmodel_t *bm;
        float dist, modelyawradius, modelradius;
        msurface_t *surface;
-       int numshadowmeshtriangles;
        hullinfo_t hullinfo;
        int totalstylesurfaces, totalstyles, stylecounts[256], remapstyles[256];
        model_brush_lightstyleinfo_t styleinfo[256];
        unsigned char *datapointer;
+       sizebuf_t sb;
 
-       mod->modeldatatypestring = "Q1BSP";
+       MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
 
        mod->type = mod_brushq1;
 
-       header = (dheader_t *)buffer;
-
-       i = LittleLong(header->version);
-       if (i != BSPVERSION && i != 30)
-               Host_Error("Mod_Q1BSP_Load: %s has wrong version number(%i should be %i(Quake) or 30(HalfLife)", mod->name, i, BSPVERSION);
-       mod->brush.ishlbsp = i == 30;
+       mod->brush.isbsp2 = false;
+       mod->brush.ishlbsp = false;
+       i = MSG_ReadLittleLong(&sb);
+       switch(i)
+       {
+       case BSPVERSION:
+               mod->modeldatatypestring = "Q1BSP";
+               break;
+       case 30:
+               mod->brush.ishlbsp = true;
+               mod->modeldatatypestring = "HLBSP";
+               break;
+       case ('2' + 'P' * 256 + 'S' * 65536 + 'B' * 16777216):
+               mod->brush.isbsp2 = true;
+               mod->brush.isbsp2rmqe = true; // like bsp2 except leaf/node bounds are 16bit (unexpanded)
+               mod->modeldatatypestring = "Q1BSP2rmqe";
+               break;
+       case ('B' + 'S' * 256 + 'P' * 65536 + '2' * 16777216):
+               mod->brush.isbsp2 = true;
+               mod->modeldatatypestring = "Q1BSP2";
+               break;
+       default:
+               mod->modeldatatypestring = "Unknown BSP";
+               Host_Error("Mod_Q1BSP_Load: %s has wrong version number %i: supported versions are 29 (Quake), 30 (Half-Life), \"BSP2\" or \"2PSB\" (rmqe)", mod->name, i);
+               return;
+       }
 
 // fill in hull info
        VectorClear (hullinfo.hullsizes[0][0]);
        VectorClear (hullinfo.hullsizes[0][1]);
        if (mod->brush.ishlbsp)
        {
-               mod->modeldatatypestring = "HLBSP";
-
                hullinfo.filehulls = 4;
                VectorSet (hullinfo.hullsizes[1][0], -16, -16, -36);
                VectorSet (hullinfo.hullsizes[1][1], 16, 16, 36);
@@ -3464,11 +3822,13 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        }
 
 // read lumps
-       mod_base = (unsigned char*)buffer;
        for (i = 0; i < HEADER_LUMPS; i++)
        {
-               header->lumps[i].fileofs = LittleLong(header->lumps[i].fileofs);
-               header->lumps[i].filelen = LittleLong(header->lumps[i].filelen);
+               int offset = MSG_ReadLittleLong(&sb);
+               int size = MSG_ReadLittleLong(&sb);
+               if (offset < 0 || offset + size > sb.cursize)
+                       Host_Error("Mod_Q1BSP_Load: %s has invalid lump %i (offset %i, size %i, file size %i)\n", mod->name, i, offset, size, (int)sb.cursize);
+               MSG_InitReadBuffer(&lumpsb[i], sb.data + offset, size);
        }
 
        mod->soundfromcenter = true;
@@ -3476,6 +3836,7 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        mod->TraceLine = Mod_Q1BSP_TraceLine;
        mod->TracePoint = Mod_Q1BSP_TracePoint;
        mod->PointSuperContents = Mod_Q1BSP_PointSuperContents;
+       mod->TraceLineAgainstSurfaces = Mod_Q1BSP_TraceLineAgainstSurfaces;
        mod->brush.TraceLineOfSight = Mod_Q1BSP_TraceLineOfSight;
        mod->brush.SuperContentsFromNativeContents = Mod_Q1BSP_SuperContentsFromNativeContents;
        mod->brush.NativeContentsFromSuperContents = Mod_Q1BSP_NativeContentsFromSuperContents;
@@ -3510,30 +3871,33 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                int temp;
                if (i == LUMP_ENTITIES)
                        continue;
-               temp = Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
+               temp = Com_BlockChecksum(lumpsb[i].data, lumpsb[i].cursize);
                mod->brush.qw_md4sum ^= LittleLong(temp);
                if (i == LUMP_VISIBILITY || i == LUMP_LEAFS || i == LUMP_NODES)
                        continue;
-               temp = Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
                mod->brush.qw_md4sum2 ^= LittleLong(temp);
        }
 
-       Mod_Q1BSP_LoadEntities(&header->lumps[LUMP_ENTITIES]);
-       Mod_Q1BSP_LoadVertexes(&header->lumps[LUMP_VERTEXES]);
-       Mod_Q1BSP_LoadEdges(&header->lumps[LUMP_EDGES]);
-       Mod_Q1BSP_LoadSurfedges(&header->lumps[LUMP_SURFEDGES]);
-       Mod_Q1BSP_LoadTextures(&header->lumps[LUMP_TEXTURES]);
-       Mod_Q1BSP_LoadLighting(&header->lumps[LUMP_LIGHTING]);
-       Mod_Q1BSP_LoadPlanes(&header->lumps[LUMP_PLANES]);
-       Mod_Q1BSP_LoadTexinfo(&header->lumps[LUMP_TEXINFO]);
-       Mod_Q1BSP_LoadFaces(&header->lumps[LUMP_FACES]);
-       Mod_Q1BSP_LoadLeaffaces(&header->lumps[LUMP_MARKSURFACES]);
-       Mod_Q1BSP_LoadVisibility(&header->lumps[LUMP_VISIBILITY]);
+       Mod_Q1BSP_LoadEntities(&lumpsb[LUMP_ENTITIES]);
+       Mod_Q1BSP_LoadVertexes(&lumpsb[LUMP_VERTEXES]);
+       Mod_Q1BSP_LoadEdges(&lumpsb[LUMP_EDGES]);
+       Mod_Q1BSP_LoadSurfedges(&lumpsb[LUMP_SURFEDGES]);
+       Mod_Q1BSP_LoadTextures(&lumpsb[LUMP_TEXTURES]);
+       Mod_Q1BSP_LoadLighting(&lumpsb[LUMP_LIGHTING]);
+       Mod_Q1BSP_LoadPlanes(&lumpsb[LUMP_PLANES]);
+       Mod_Q1BSP_LoadTexinfo(&lumpsb[LUMP_TEXINFO]);
+       Mod_Q1BSP_LoadFaces(&lumpsb[LUMP_FACES]);
+       Mod_Q1BSP_LoadLeaffaces(&lumpsb[LUMP_MARKSURFACES]);
+       Mod_Q1BSP_LoadVisibility(&lumpsb[LUMP_VISIBILITY]);
        // load submodels before leafs because they contain the number of vis leafs
-       Mod_Q1BSP_LoadSubmodels(&header->lumps[LUMP_MODELS], &hullinfo);
-       Mod_Q1BSP_LoadLeafs(&header->lumps[LUMP_LEAFS]);
-       Mod_Q1BSP_LoadNodes(&header->lumps[LUMP_NODES]);
-       Mod_Q1BSP_LoadClipnodes(&header->lumps[LUMP_CLIPNODES], &hullinfo);
+       Mod_Q1BSP_LoadSubmodels(&lumpsb[LUMP_MODELS], &hullinfo);
+       Mod_Q1BSP_LoadLeafs(&lumpsb[LUMP_LEAFS]);
+       Mod_Q1BSP_LoadNodes(&lumpsb[LUMP_NODES]);
+       Mod_Q1BSP_LoadClipnodes(&lumpsb[LUMP_CLIPNODES], &hullinfo);
+
+       for (i = 0; i < HEADER_LUMPS; i++)
+               if (lumpsb[i].readcount != lumpsb[i].cursize && i != LUMP_TEXTURES && i != LUMP_LIGHTING)
+                       Host_Error("Lump %i incorrectly loaded (readcount %i, size %i)\n", i, lumpsb[i].readcount, lumpsb[i].cursize);
 
        // check if the map supports transparent water rendering
        loadmodel->brush.supportwateralpha = Mod_Q1BSP_CheckWaterAlphaSupport();
@@ -3544,23 +3908,14 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        mod->brushq1.num_compressedpvs = 0;
 
        Mod_Q1BSP_MakeHull0();
-       Mod_Q1BSP_MakePortals();
+       if (mod_bsp_portalize.integer)
+               Mod_Q1BSP_MakePortals();
 
        mod->numframes = 2;             // regular and alternate animation
        mod->numskins = 1;
 
        // make a single combined shadow mesh to allow optimized shadow volume creation
-       numshadowmeshtriangles = 0;
-       for (j = 0, surface = loadmodel->data_surfaces;j < loadmodel->num_surfaces;j++, surface++)
-       {
-               surface->num_firstshadowmeshtriangle = numshadowmeshtriangles;
-               numshadowmeshtriangles += surface->num_triangles;
-       }
-       loadmodel->brush.shadowmesh = Mod_ShadowMesh_Begin(loadmodel->mempool, numshadowmeshtriangles * 3, numshadowmeshtriangles, NULL, NULL, NULL, false, false, true);
-       for (j = 0, surface = loadmodel->data_surfaces;j < loadmodel->num_surfaces;j++, surface++)
-               Mod_ShadowMesh_AddMesh(loadmodel->mempool, loadmodel->brush.shadowmesh, NULL, NULL, NULL, loadmodel->surfmesh.data_vertex3f, NULL, NULL, NULL, NULL, surface->num_triangles, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
-       loadmodel->brush.shadowmesh = Mod_ShadowMesh_Finish(loadmodel->mempool, loadmodel->brush.shadowmesh, false, true, false);
-       Mod_BuildTriangleNeighbors(loadmodel->brush.shadowmesh->neighbor3i, loadmodel->brush.shadowmesh->element3i, loadmodel->brush.shadowmesh->numtriangles);
+       Mod_Q1BSP_CreateShadowMesh(loadmodel);
 
        if (loadmodel->brush.numsubmodels)
                loadmodel->brush.submodels = (dp_model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
@@ -3736,12 +4091,17 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                }
                //mod->brushq1.num_visleafs = bm->visleafs;
 
+               // build a Bounding Interval Hierarchy for culling triangles in light rendering
+               Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
+
                if (mod_q1bsp_polygoncollisions.integer)
                {
-                       Mod_MakeCollisionBIH(mod, true);
+                       mod->collision_bih = mod->render_bih;
                        // point traces and contents checks still use the bsp tree
                        mod->TraceLine = Mod_CollisionBIH_TraceLine;
                        mod->TraceBox = Mod_CollisionBIH_TraceBox;
+                       mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
+                       mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLineAgainstSurfaces;
                }
 
                // generate VBOs and other shared data before cloning submodels
@@ -4134,7 +4494,7 @@ static void Mod_Q2BSP_LoadModels(lump_t *l)
 */
 }
 
-void static Mod_Q2BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
+static void Mod_Q2BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
        int i;
        q2dheader_t *header;
@@ -4210,11 +4570,11 @@ static void Mod_Q3BSP_LoadEntities(lump_t *l)
        // some Q3 maps override the lightgrid_cellsize with a worldspawn key
        // VorteX: q3map2 FS-R generates tangentspace deluxemaps for q3bsp and sets 'deluxeMaps' key
        loadmodel->brushq3.deluxemapping = false;
-       if (data && COM_ParseToken_Simple(&data, false, false) && com_token[0] == '{')
+       if (data && COM_ParseToken_Simple(&data, false, false, true) && com_token[0] == '{')
        {
                while (1)
                {
-                       if (!COM_ParseToken_Simple(&data, false, false))
+                       if (!COM_ParseToken_Simple(&data, false, false, true))
                                break; // error
                        if (com_token[0] == '}')
                                break; // end of worldspawn
@@ -4224,7 +4584,7 @@ static void Mod_Q3BSP_LoadEntities(lump_t *l)
                                strlcpy(key, com_token, sizeof(key));
                        while (key[strlen(key)-1] == ' ') // remove trailing spaces
                                key[strlen(key)-1] = 0;
-                       if (!COM_ParseToken_Simple(&data, false, false))
+                       if (!COM_ParseToken_Simple(&data, false, false, true))
                                break; // error
                        strlcpy(value, com_token, sizeof(value));
                        if (!strcasecmp("gridsize", key)) // this one is case insensitive to 100% match q3map2
@@ -4281,13 +4641,10 @@ static void Mod_Q3BSP_LoadTextures(lump_t *l)
                strlcpy (out[i].name, in[i].name, sizeof (out[i].name));
                out[i].surfaceflags = LittleLong(in[i].surfaceflags);
                out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(loadmodel, LittleLong(in[i].contents));
-               if (cls.state != ca_dedicated)
-               {
-                       Mod_LoadTextureFromQ3Shader(out + i, out[i].name, true, true, TEXF_MIPMAP | (r_picmipworld.integer ? TEXF_PICMIP : 0) | TEXF_COMPRESS);
-                       // restore the surfaceflags and supercontents
-                       out[i].surfaceflags = LittleLong(in[i].surfaceflags);
-                       out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(loadmodel, LittleLong(in[i].contents));
-               }
+               Mod_LoadTextureFromQ3Shader(out + i, out[i].name, true, true, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS);
+               // restore the surfaceflags and supercontents
+               out[i].surfaceflags = LittleLong(in[i].surfaceflags);
+               out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(loadmodel, LittleLong(in[i].contents));
        }
 }
 
@@ -4488,10 +4845,43 @@ static void Mod_Q3BSP_LoadVertices(lump_t *l)
                loadmodel->brushq3.data_texcoordlightmap2f[i * 2 + 0] = LittleFloat(in->lightmap2f[0]);
                loadmodel->brushq3.data_texcoordlightmap2f[i * 2 + 1] = LittleFloat(in->lightmap2f[1]);
                // svector/tvector are calculated later in face loading
-               loadmodel->brushq3.data_color4f[i * 4 + 0] = in->color4ub[0] * (1.0f / 255.0f);
-               loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
-               loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
+               if(mod_q3bsp_sRGBlightmaps.integer)
+               {
+                       // if lightmaps are sRGB, vertex colors are sRGB too, so we need to linearize them
+                       // note: when this is in use, lightmap color 128 is no longer neutral, but "sRGB half power" is
+                       // working like this may be odd, but matches q3map2 -gamma 2.2
+                       if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
+                       {
+                               loadmodel->brushq3.data_color4f[i * 4 + 0] = in->color4ub[0] * (1.0f / 255.0f);
+                               loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
+                               loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
+                               // we fix the brightness consistently via lightmapscale
+                       }
+                       else
+                       {
+                               loadmodel->brushq3.data_color4f[i * 4 + 0] = Image_LinearFloatFromsRGB(in->color4ub[0]);
+                               loadmodel->brushq3.data_color4f[i * 4 + 1] = Image_LinearFloatFromsRGB(in->color4ub[1]);
+                               loadmodel->brushq3.data_color4f[i * 4 + 2] = Image_LinearFloatFromsRGB(in->color4ub[2]);
+                       }
+               }
+               else
+               {
+                       if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
+                       {
+                               loadmodel->brushq3.data_color4f[i * 4 + 0] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[0]);
+                               loadmodel->brushq3.data_color4f[i * 4 + 1] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[1]);
+                               loadmodel->brushq3.data_color4f[i * 4 + 2] = Image_sRGBFloatFromLinear_Lightmap(in->color4ub[2]);
+                       }
+                       else
+                       {
+                               loadmodel->brushq3.data_color4f[i * 4 + 0] = in->color4ub[0] * (1.0f / 255.0f);
+                               loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
+                               loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
+                       }
+               }
                loadmodel->brushq3.data_color4f[i * 4 + 3] = in->color4ub[3] * (1.0f / 255.0f);
+               if(in->color4ub[0] != 255 || in->color4ub[1] != 255 || in->color4ub[2] != 255)
+                       loadmodel->lit = true;
        }
 }
 
@@ -4532,14 +4922,35 @@ static void Mod_Q3BSP_LoadTriangles(lump_t *l)
 static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
 {
        q3dlightmap_t *input_pointer;
-       int i, j, k, count, power, power2, endlightmap, mergewidth, mergeheight;
+       int i;
+       int j;
+       int k;
+       int count;
+       int powerx;
+       int powery;
+       int powerxy;
+       int powerdxy;
+       int endlightmap;
+       int mergegoal;
+       int lightmapindex;
+       int realcount;
+       int realindex;
+       int mergedwidth;
+       int mergedheight;
+       int mergedcolumns;
+       int mergedrows;
+       int mergedrowsxcolumns;
+       int size;
+       int bytesperpixel;
+       int rgbmap[3];
        unsigned char *c;
-
-       unsigned char *convertedpixels;
+       unsigned char *mergedpixels;
+       unsigned char *mergeddeluxepixels;
+       unsigned char *mergebuf;
        char mapname[MAX_QPATH];
-       int size, bytesperpixel, rgbmap[3];
        qboolean external;
        unsigned char *inpixels[10000]; // max count q3map2 can output (it uses 4 digits)
+       char vabuf[1024];
 
        // defaults for q3bsp
        size = 128;
@@ -4576,7 +4987,7 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
                if (developer_loading.integer)
                        Con_Printf("Using external lightmaps\n");
                FS_StripExtension(loadmodel->name, mapname, sizeof(mapname));
-               inpixels[0] = loadimagepixelsbgra(va("%s/lm_%04d", mapname, 0), false, false, false);
+               inpixels[0] = loadimagepixelsbgra(va(vabuf, sizeof(vabuf), "%s/lm_%04d", mapname, 0), false, false, false, NULL);
                if(!inpixels[0])
                        return;
 
@@ -4596,7 +5007,7 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
 
                for(count = 1; ; ++count)
                {
-                       inpixels[count] = loadimagepixelsbgra(va("%s/lm_%04d", mapname, count), false, false, false);
+                       inpixels[count] = loadimagepixelsbgra(va(vabuf, sizeof(vabuf), "%s/lm_%04d", mapname, count), false, false, false, NULL);
                        if(!inpixels[count])
                                break; // we got all of them
                        if(image_width != size || image_height != size)
@@ -4609,7 +5020,6 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
                }
        }
 
-       convertedpixels = (unsigned char *) Mem_Alloc(tempmempool, size*size*4);
        loadmodel->brushq3.lightmapsize = size;
        loadmodel->brushq3.num_originallightmaps = count;
 
@@ -4679,18 +5089,42 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
 
        // figure out what the most reasonable merge power is within limits
 
-       loadmodel->brushq3.num_lightmapmergepower = 0;
-
-       for(i = 0; (128 << i) < size; ++i)
-               ;
-       // i is now 0 for 128, 1 for 256, etc
-
-       for (power = 1;power + i <= mod_q3bsp_lightmapmergepower.integer && (size << power) <= (int)vid.maxtexturesize_2d && (1 << (power * 2)) < 4 * (count >> (loadmodel->brushq3.deluxemapping ? 1 : 0)); power++)
-               loadmodel->brushq3.num_lightmapmergepower = power;
-
-       loadmodel->brushq3.num_lightmapmerge = 1 << loadmodel->brushq3.num_lightmapmergepower;
-
-       loadmodel->brushq3.num_mergedlightmaps = ((count >> (loadmodel->brushq3.deluxemapping ? 1 : 0)) + (1 << (loadmodel->brushq3.num_lightmapmergepower * 2)) - 1) >> (loadmodel->brushq3.num_lightmapmergepower * 2);
+       // find the appropriate NxN dimensions to merge to, to avoid wasted space
+       realcount = count >> (int)loadmodel->brushq3.deluxemapping;
+
+       // figure out how big the merged texture has to be
+       mergegoal = 128<<bound(0, mod_q3bsp_lightmapmergepower.integer, 6);
+       mergegoal = bound(size, mergegoal, (int)vid.maxtexturesize_2d);
+       while (mergegoal > size && mergegoal * mergegoal / 4 >= size * size * realcount)
+               mergegoal /= 2;
+       mergedwidth = mergegoal;
+       mergedheight = mergegoal;
+       // choose non-square size (2x1 aspect) if only half the space is used;
+       // this really only happens when the entire set fits in one texture, if
+       // there are multiple textures, we don't worry about shrinking the last
+       // one to fit, because the driver prefers the same texture size on
+       // consecutive draw calls...
+       if (mergedwidth * mergedheight / 2 >= size*size*realcount)
+               mergedheight /= 2;
+
+       loadmodel->brushq3.num_lightmapmergedwidthpower = 0;
+       loadmodel->brushq3.num_lightmapmergedheightpower = 0;
+       while (mergedwidth > size<<loadmodel->brushq3.num_lightmapmergedwidthpower)
+               loadmodel->brushq3.num_lightmapmergedwidthpower++;
+       while (mergedheight > size<<loadmodel->brushq3.num_lightmapmergedheightpower)
+               loadmodel->brushq3.num_lightmapmergedheightpower++;
+       loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower = loadmodel->brushq3.num_lightmapmergedwidthpower + loadmodel->brushq3.num_lightmapmergedheightpower + (loadmodel->brushq3.deluxemapping ? 1 : 0);
+
+       powerx = loadmodel->brushq3.num_lightmapmergedwidthpower;
+       powery = loadmodel->brushq3.num_lightmapmergedheightpower;
+       powerxy = powerx+powery;
+       powerdxy = loadmodel->brushq3.deluxemapping + powerxy;
+
+       mergedcolumns = 1 << powerx;
+       mergedrows = 1 << powery;
+       mergedrowsxcolumns = 1 << powerxy;
+
+       loadmodel->brushq3.num_mergedlightmaps = (realcount + (1 << powerxy) - 1) >> powerxy;
        loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
        if (loadmodel->brushq3.deluxemapping)
                loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
@@ -4699,60 +5133,62 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
        if (loadmodel->texturepool == NULL && cls.state != ca_dedicated)
                loadmodel->texturepool = R_AllocTexturePool();
 
-       power = loadmodel->brushq3.num_lightmapmergepower;
-       power2 = power * 2;
+       mergedpixels = (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4);
+       mergeddeluxepixels = loadmodel->brushq3.deluxemapping ? (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4) : NULL;
        for (i = 0;i < count;i++)
        {
                // figure out which merged lightmap texture this fits into
-               int lightmapindex = i >> (loadmodel->brushq3.deluxemapping + power2);
-               for (k = 0;k < size*size;k++)
-               {
-                       convertedpixels[k*4+0] = inpixels[i][k*bytesperpixel+rgbmap[0]];
-                       convertedpixels[k*4+1] = inpixels[i][k*bytesperpixel+rgbmap[1]];
-                       convertedpixels[k*4+2] = inpixels[i][k*bytesperpixel+rgbmap[2]];
-                       convertedpixels[k*4+3] = 255;
-               }
-               if (loadmodel->brushq3.num_lightmapmergepower > 0)
+               realindex = i >> (int)loadmodel->brushq3.deluxemapping;
+               lightmapindex = i >> powerdxy;
+
+               // choose the destination address
+               mergebuf = (loadmodel->brushq3.deluxemapping && (i & 1)) ? mergeddeluxepixels : mergedpixels;
+               mergebuf += 4 * (realindex & (mergedcolumns-1))*size + 4 * ((realindex >> powerx) & (mergedrows-1))*mergedwidth*size;
+               if ((i & 1) == 0 || !loadmodel->brushq3.deluxemapping)
+                       Con_DPrintf("copying original lightmap %i (%ix%i) to %i (at %i,%i)\n", i, size, size, lightmapindex, (realindex & (mergedcolumns-1))*size, ((realindex >> powerx) & (mergedrows-1))*size);
+
+               // convert pixels from RGB or BGRA while copying them into the destination rectangle
+               for (j = 0;j < size;j++)
+               for (k = 0;k < size;k++)
                {
-                       // if the lightmap has not been allocated yet, create it
-                       if (!loadmodel->brushq3.data_lightmaps[lightmapindex])
-                       {
-                               // create a lightmap only as large as necessary to hold the
-                               // remaining size*size blocks
-                               // if there are multiple merged lightmap textures then they will
-                               // all be full size except the last one which may be smaller
-                               // because it only needs to the remaining blocks, and it will often
-                               // be odd sizes like 2048x512 due to only being 25% full or so.
-                               j = (count >> (loadmodel->brushq3.deluxemapping ? 1 : 0)) - (lightmapindex << power2);
-                               for (mergewidth = 1;mergewidth < j && mergewidth < (1 << power);mergewidth *= 2)
-                                       ;
-                               for (mergeheight = 1;mergewidth*mergeheight < j && mergeheight < (1 << power);mergeheight *= 2)
-                                       ;
-                               if (developer_loading.integer)
-                                       Con_Printf("lightmap merge texture #%i is %ix%i (%i of %i used)\n", lightmapindex, mergewidth*size, mergeheight*size, min(j, mergewidth*mergeheight), mergewidth*mergeheight);
-                               loadmodel->brushq3.data_lightmaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("lightmap%04i", lightmapindex), mergewidth * size, mergeheight * size, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : TEXF_ALLOWUPDATES), NULL);
-                               if (loadmodel->brushq3.data_deluxemaps)
-                                       loadmodel->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("deluxemap%04i", lightmapindex), mergewidth * size, mergeheight * size, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : TEXF_ALLOWUPDATES), NULL);
-                       }
-                       mergewidth = R_TextureWidth(loadmodel->brushq3.data_lightmaps[lightmapindex]) / size;
-                       mergeheight = R_TextureHeight(loadmodel->brushq3.data_lightmaps[lightmapindex]) / size;
-                       j = (i >> (loadmodel->brushq3.deluxemapping ? 1 : 0)) & ((1 << power2) - 1);
-                       if (loadmodel->brushq3.deluxemapping && (i & 1))
-                               R_UpdateTexture(loadmodel->brushq3.data_deluxemaps[lightmapindex], convertedpixels, (j % mergewidth) * size, (j / mergewidth) * size, size, size);
-                       else
-                               R_UpdateTexture(loadmodel->brushq3.data_lightmaps [lightmapindex], convertedpixels, (j % mergewidth) * size, (j / mergewidth) * size, size, size);
+                       mergebuf[(j*mergedwidth+k)*4+0] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[0]];
+                       mergebuf[(j*mergedwidth+k)*4+1] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[1]];
+                       mergebuf[(j*mergedwidth+k)*4+2] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[2]];
+                       mergebuf[(j*mergedwidth+k)*4+3] = 255;
                }
-               else
+
+               // upload texture if this was the last tile being written to the texture
+               if (((realindex + 1) & (mergedrowsxcolumns - 1)) == 0 || (realindex + 1) == realcount)
                {
-                       // figure out which merged lightmap texture this fits into
                        if (loadmodel->brushq3.deluxemapping && (i & 1))
-                               loadmodel->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("deluxemap%04i", lightmapindex), size, size, convertedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : 0), NULL);
+                               loadmodel->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "deluxemap%04i", lightmapindex), mergedwidth, mergedheight, mergeddeluxepixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : 0), -1, NULL);
                        else
-                               loadmodel->brushq3.data_lightmaps [lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("lightmap%04i", lightmapindex), size, size, convertedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), NULL);
+                       {
+                               if(mod_q3bsp_sRGBlightmaps.integer)
+                               {
+                                       textype_t t;
+                                       if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
+                                       {
+                                               t = TEXTYPE_BGRA; // in stupid fallback mode, we upload lightmaps in sRGB form and just fix their brightness
+                                               // we fix the brightness consistently via lightmapscale
+                                       }
+                                       else
+                                               t = TEXTYPE_SRGB_BGRA; // normally, we upload lightmaps in sRGB form (possibly downconverted to linear)
+                                       loadmodel->brushq3.data_lightmaps [lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "lightmap%04i", lightmapindex), mergedwidth, mergedheight, mergedpixels, t, TEXF_FORCELINEAR | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), -1, NULL);
+                               }
+                               else
+                               {
+                                       if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
+                                               Image_MakesRGBColorsFromLinear_Lightmap(mergedpixels, mergedpixels, mergedwidth * mergedheight);
+                                       loadmodel->brushq3.data_lightmaps [lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va(vabuf, sizeof(vabuf), "lightmap%04i", lightmapindex), mergedwidth, mergedheight, mergedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), -1, NULL);
+                               }
+                       }
                }
        }
 
-       Mem_Free(convertedpixels);
+       if (mergeddeluxepixels)
+               Mem_Free(mergeddeluxepixels);
+       Mem_Free(mergedpixels);
        if(external)
        {
                for(i = 0; i < count; ++i)
@@ -4914,9 +5350,10 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                        }
                        else
                        {
-                               out->lightmaptexture = loadmodel->brushq3.data_lightmaps[n >> (loadmodel->brushq3.num_lightmapmergepower * 2 + loadmodel->brushq3.deluxemapping)];
+                               out->lightmaptexture = loadmodel->brushq3.data_lightmaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
                                if (loadmodel->brushq3.deluxemapping)
-                                       out->deluxemaptexture = loadmodel->brushq3.data_deluxemaps[n >> (loadmodel->brushq3.num_lightmapmergepower * 2 + loadmodel->brushq3.deluxemapping)];
+                                       out->deluxemaptexture = loadmodel->brushq3.data_deluxemaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
+                               loadmodel->lit = true;
                        }
                }
 
@@ -5056,8 +5493,8 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
        Mod_AllocSurfMesh(loadmodel->mempool, meshvertices, meshtriangles, false, true, false);
        if (collisiontriangles)
        {
-               loadmodel->brush.data_collisionvertex3f = Mem_Alloc(loadmodel->mempool, collisionvertices * sizeof(float[3]));
-               loadmodel->brush.data_collisionelement3i = Mem_Alloc(loadmodel->mempool, collisiontriangles * sizeof(int[3]));
+               loadmodel->brush.data_collisionvertex3f = (float *)Mem_Alloc(loadmodel->mempool, collisionvertices * sizeof(float[3]));
+               loadmodel->brush.data_collisionelement3i = (int *)Mem_Alloc(loadmodel->mempool, collisiontriangles * sizeof(int[3]));
        }
        meshvertices = 0;
        meshtriangles = 0;
@@ -5271,13 +5708,20 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                if(out->num_vertices && out->num_triangles)
                        continue;
                if(out->num_vertices == 0)
-                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d has no vertices, ignoring\n", i);
-               if(out->num_triangles == 0)
-                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d has no triangles, ignoring\n", i);
+               {
+                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no vertices, ignoring\n", i, out->texture ? out->texture->name : "(none)");
+                       if(out->num_triangles == 0)
+                               Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)");
+               }
+               else if(out->num_triangles == 0)
+                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s, near %f %f %f) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)",
+                                       (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[0 * 3 + 0],
+                                       (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[1 * 3 + 0],
+                                       (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[2 * 3 + 0]);
        }
 
        // for per pixel lighting
-       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, true);
+       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
 
        // generate ushort elements array if possible
        if (loadmodel->surfmesh.data_element3s)
@@ -5440,6 +5884,8 @@ static void Mod_Q3BSP_LoadNodes(lump_t *l)
        if (l->filelen % sizeof(*in))
                Host_Error("Mod_Q3BSP_LoadNodes: funny lump size in %s",loadmodel->name);
        count = l->filelen / sizeof(*in);
+       if (count == 0)
+               Host_Error("Mod_Q3BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
        out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
 
        loadmodel->brush.data_nodes = out;
@@ -5486,6 +5932,7 @@ static void Mod_Q3BSP_LoadLightGrid(lump_t *l)
        q3dlightgrid_t *in;
        q3dlightgrid_t *out;
        int count;
+       int i;
 
        in = (q3dlightgrid_t *)(mod_base + l->fileofs);
        if (l->filelen % sizeof(*in))
@@ -5521,6 +5968,45 @@ static void Mod_Q3BSP_LoadLightGrid(lump_t *l)
                loadmodel->brushq3.num_lightgrid = count;
                // no swapping or validation necessary
                memcpy(out, in, count * (int)sizeof(*out));
+
+               if(mod_q3bsp_sRGBlightmaps.integer)
+               {
+                       if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
+                       {
+                               // we fix the brightness consistently via lightmapscale
+                       }
+                       else
+                       {
+                               for(i = 0; i < count; ++i)
+                               {
+                                       out[i].ambientrgb[0] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[0]) * 255.0f + 0.5f);
+                                       out[i].ambientrgb[1] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[1]) * 255.0f + 0.5f);
+                                       out[i].ambientrgb[2] = floor(Image_LinearFloatFromsRGB(out[i].ambientrgb[2]) * 255.0f + 0.5f);
+                                       out[i].diffusergb[0] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[0]) * 255.0f + 0.5f);
+                                       out[i].diffusergb[1] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[1]) * 255.0f + 0.5f);
+                                       out[i].diffusergb[2] = floor(Image_LinearFloatFromsRGB(out[i].diffusergb[2]) * 255.0f + 0.5f);
+                               }
+                       }
+               }
+               else
+               {
+                       if(vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
+                       {
+                               for(i = 0; i < count; ++i)
+                               {
+                                       out[i].ambientrgb[0] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[0]) * 255.0f + 0.5f);
+                                       out[i].ambientrgb[1] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[1]) * 255.0f + 0.5f);
+                                       out[i].ambientrgb[2] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].ambientrgb[2]) * 255.0f + 0.5f);
+                                       out[i].diffusergb[0] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[0]) * 255.0f + 0.5f);
+                                       out[i].diffusergb[1] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[1]) * 255.0f + 0.5f);
+                                       out[i].diffusergb[2] = floor(Image_sRGBFloatFromLinear_Lightmap(out[i].diffusergb[2]) * 255.0f + 0.5f);
+                               }
+                       }
+                       else
+                       {
+                               // all is good
+                       }
+               }
        }
 }
 
@@ -5565,11 +6051,27 @@ static void Mod_Q3BSP_LoadPVS(lump_t *l)
 static void Mod_Q3BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
 {
        int i, j, k, index[3];
-       float transformed[3], blend1, blend2, blend, stylescale;
+       float transformed[3], blend1, blend2, blend, stylescale = 1;
        q3dlightgrid_t *a, *s;
 
        // scale lighting by lightstyle[0] so that darkmode in dpmod works properly
-       stylescale = r_refdef.scene.rtlightstylevalue[0];
+       switch(vid.renderpath)
+       {
+       case RENDERPATH_GL20:
+       case RENDERPATH_D3D9:
+       case RENDERPATH_D3D10:
+       case RENDERPATH_D3D11:
+       case RENDERPATH_SOFT:
+       case RENDERPATH_GLES2:
+               // LordHavoc: FIXME: is this true?
+               stylescale = 1; // added while render
+               break;
+       case RENDERPATH_GL11:
+       case RENDERPATH_GL13:
+       case RENDERPATH_GLES1:
+               stylescale = r_refdef.scene.rtlightstylevalue[0];
+               break;
+       }
 
        if (!model->brushq3.num_lightgrid)
        {
@@ -5705,487 +6207,363 @@ static qboolean Mod_Q3BSP_TraceLineOfSight(struct model_s *model, const vec3_t s
        }
 }
 
-static void Mod_CollisionBIH_TracePoint_RecursiveBIHNode(trace_t *trace, dp_model_t *model, int nodenum, const vec3_t point)
+void Mod_CollisionBIH_TracePoint(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask)
 {
+       const bih_t *bih;
        const bih_leaf_t *leaf;
        const bih_node_t *node;
        const colbrushf_t *brush;
        int axis;
-       while (nodenum >= 0)
+       int nodenum;
+       int nodestackpos = 0;
+       int nodestack[1024];
+
+       memset(trace, 0, sizeof(*trace));
+       trace->fraction = 1;
+       trace->hitsupercontentsmask = hitsupercontentsmask;
+
+       bih = &model->collision_bih;
+       if(!bih->nodes)
+               return;
+
+       nodenum = bih->rootnode;
+       nodestack[nodestackpos++] = nodenum;
+       while (nodestackpos)
        {
-               node = model->collision_bih.nodes + nodenum;
-               axis = node->type - BIH_SPLITX;
-               if (point[axis] <= node->backmax)
+               nodenum = nodestack[--nodestackpos];
+               node = bih->nodes + nodenum;
+#if 1
+               if (!BoxesOverlap(start, start, node->mins, node->maxs))
+                       continue;
+#endif
+               if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
                {
-                       if (point[axis] >= node->frontmin)
-                               Mod_CollisionBIH_TracePoint_RecursiveBIHNode(trace, model, node->front, point);
-                       nodenum = node->back;
+                       axis = node->type - BIH_SPLITX;
+                       if (start[axis] >= node->frontmin)
+                               nodestack[nodestackpos++] = node->front;
+                       if (start[axis] <= node->backmax)
+                               nodestack[nodestackpos++] = node->back;
+               }
+               else if (node->type == BIH_UNORDERED)
+               {
+                       for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
+                       {
+                               leaf = bih->leafs + node->children[axis];
+#if 1
+                               if (!BoxesOverlap(start, start, leaf->mins, leaf->maxs))
+                                       continue;
+#endif
+                               switch(leaf->type)
+                               {
+                               case BIH_BRUSH:
+                                       brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
+                                       Collision_TracePointBrushFloat(trace, start, brush);
+                                       break;
+                               case BIH_COLLISIONTRIANGLE:
+                                       // collision triangle - skipped because they have no volume
+                                       break;
+                               case BIH_RENDERTRIANGLE:
+                                       // render triangle - skipped because they have no volume
+                                       break;
+                               }
+                       }
                }
-               else if (point[axis] >= node->frontmin)
-                       nodenum = node->front;
-               else // no overlap with either child?  just return
-                       return;
        }
-       if (!model->collision_bih.leafs)
+}
+
+static void Mod_CollisionBIH_TraceLineShared(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask, const bih_t *bih)
+{
+       const bih_leaf_t *leaf;
+       const bih_node_t *node;
+       const colbrushf_t *brush;
+       const int *e;
+       const texture_t *texture;
+       vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
+       vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
+       int axis, nodenum, nodestackpos = 0, nodestack[1024];
+
+       if(!bih->nodes)
                return;
-       leaf = model->collision_bih.leafs + (-1-nodenum);
-       switch(leaf->type)
+
+       if (VectorCompare(start, end))
        {
-       case BIH_BRUSH:
-               brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
-               Collision_TracePointBrushFloat(trace, point, brush);
-               break;
-       case BIH_COLLISIONTRIANGLE:
-               // collision triangle - skipped because they have no volume
-               break;
-       case BIH_RENDERTRIANGLE:
-               // render triangle - skipped because they have no volume
-               break;
+               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+               return;
+       }
+
+       nodenum = bih->rootnode;
+
+       memset(trace, 0, sizeof(*trace));
+       trace->fraction = 1;
+       trace->hitsupercontentsmask = hitsupercontentsmask;
+
+       // push first node
+       nodestackline[nodestackpos][0] = start[0];
+       nodestackline[nodestackpos][1] = start[1];
+       nodestackline[nodestackpos][2] = start[2];
+       nodestackline[nodestackpos][3] = end[0];
+       nodestackline[nodestackpos][4] = end[1];
+       nodestackline[nodestackpos][5] = end[2];
+       nodestack[nodestackpos++] = nodenum;
+       while (nodestackpos)
+       {
+               nodenum = nodestack[--nodestackpos];
+               node = bih->nodes + nodenum;
+               VectorCopy(nodestackline[nodestackpos], nodestart);
+               VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
+               sweepnodemins[0] = min(nodestart[0], nodeend[0]) - 1;
+               sweepnodemins[1] = min(nodestart[1], nodeend[1]) - 1;
+               sweepnodemins[2] = min(nodestart[2], nodeend[2]) - 1;
+               sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + 1;
+               sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + 1;
+               sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + 1;
+               if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs))
+                       continue;
+               if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
+               {
+                       // recurse children of the split
+                       axis = node->type - BIH_SPLITX;
+                       d1 = node->backmax - nodestart[axis];
+                       d2 = node->backmax - nodeend[axis];
+                       d3 = nodestart[axis] - node->frontmin;
+                       d4 = nodeend[axis] - node->frontmin;
+                       switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
+                       {
+                       case  0: /* >>>> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  1: /* <>>> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  2: /* ><>> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  4: /* >><> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  5: /* <><> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  6: /* ><<> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  8: /* >>>< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  9: /* <>>< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 10: /* ><>< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
+                       }
+               }
+               else if (node->type == BIH_UNORDERED)
+               {
+                       // calculate sweep bounds for this node
+                       // copy node bounds into local variables
+                       VectorCopy(node->mins, nodebigmins);
+                       VectorCopy(node->maxs, nodebigmaxs);
+                       // clip line to this node bounds
+                       axis = 0; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       axis = 1; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       axis = 2; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       // some of the line intersected the enlarged node box
+                       // calculate sweep bounds for this node
+                       sweepnodemins[0] = min(nodestart[0], nodeend[0]) - 1;
+                       sweepnodemins[1] = min(nodestart[1], nodeend[1]) - 1;
+                       sweepnodemins[2] = min(nodestart[2], nodeend[2]) - 1;
+                       sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + 1;
+                       sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + 1;
+                       sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + 1;
+                       for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
+                       {
+                               leaf = bih->leafs + node->children[axis];
+                               if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
+                                       continue;
+                               switch(leaf->type)
+                               {
+                               case BIH_BRUSH:
+                                       brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
+                                       Collision_TraceLineBrushFloat(trace, start, end, brush, brush);
+                                       break;
+                               case BIH_COLLISIONTRIANGLE:
+                                       if (!mod_q3bsp_curves_collisions.integer)
+                                               continue;
+                                       e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceLineTriangleFloat(trace, start, end, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               case BIH_RENDERTRIANGLE:
+                                       e = model->surfmesh.data_element3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceLineTriangleFloat(trace, start, end, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               }
+                       }
+               }
+       }
+}
+
+void Mod_CollisionBIH_TraceLine(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
+{
+       if (VectorCompare(start, end))
+       {
+               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+               return;
        }
+       Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, &model->collision_bih);
 }
 
-static void Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace_t *trace, dp_model_t *model, int nodenum, const vec3_t start, const vec3_t end, const vec3_t linestart, const vec3_t lineend)
+void Mod_CollisionBIH_TraceBrush(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, colbrushf_t *thisbrush_start, colbrushf_t *thisbrush_end, int hitsupercontentsmask)
 {
+       const bih_t *bih;
        const bih_leaf_t *leaf;
        const bih_node_t *node;
        const colbrushf_t *brush;
        const int *e;
        const texture_t *texture;
-       int axis;
-#define BIHLINECLIP
-#ifdef BIHLINECLIP
-       int sideflags;
-       vec_t frontdist1;
-       vec_t frontdist2;
-       vec_t frontfrac;
-       vec_t backdist1;
-       vec_t backdist2;
-       vec_t backfrac;
-       vec3_t clipped[2];
-#endif
-       vec3_t segmentmins;
-       vec3_t segmentmaxs;
-       segmentmins[0] = min(start[0], end[0]);
-       segmentmins[1] = min(start[1], end[1]);
-       segmentmins[2] = min(start[2], end[2]);
-       segmentmaxs[0] = max(start[0], end[0]);
-       segmentmaxs[1] = max(start[1], end[1]);
-       segmentmaxs[2] = max(start[2], end[2]);
-       while (nodenum >= 0)
-       {
-               node = model->collision_bih.nodes + nodenum;
-#if 0
-               if (!BoxesOverlap(segmentmins, segmentmaxs, node->mins, node->maxs))
-                       return;
-#endif
-               axis = node->type - BIH_SPLITX;
-#if 0
-               if (segmentmins[axis] <= node->backmax)
-               {
-                       if (segmentmaxs[axis] >= node->frontmin)
-                               Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
-                       nodenum = node->back;
-               }
-               else if (segmentmaxs[axis] >= node->frontmin)
-                       nodenum = node->front;
-               else
-                       return; // trace falls between children
-#else
-               frontdist1 = start[axis] - node->frontmin;
-               frontdist2 = end[axis] - node->frontmin;
-               backdist1 = start[axis] - node->backmax;
-               backdist2 = end[axis] - node->backmax;
-               sideflags = 0;
-               if (frontdist1 < 0)
-                       sideflags |= 1;
-               if (frontdist2 < 0)
-                       sideflags |= 2;
-               if (backdist1 < 0)
-                       sideflags |= 4;
-               if (backdist2 < 0)
-                       sideflags |= 8;
-#if 0
-               if (sideflags & 12)
-               {
-                       if ((sideflags & 3) != 3)
-                               Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
-                       nodenum = node->back;
-               }
-               else if ((sideflags & 3) != 3)
-                       nodenum = node->front;
-               else
-                       return; // trace falls between children
-#else
-               switch(sideflags)
-               {
-               case 0:
-                       // start end START END
-                       nodenum = node->front;
-                       continue;
-               case 1:
-                       // START end START END
-#ifdef BIHLINECLIP
-                       frontfrac = frontdist1 / (frontdist1 - frontdist2);
-                       VectorLerp(start, frontfrac, end, clipped[0]);
-                       start = clipped[0];
-                       segmentmins[0] = min(start[0], end[0]);
-                       segmentmins[1] = min(start[1], end[1]);
-                       segmentmins[2] = min(start[2], end[2]);
-                       segmentmaxs[0] = max(start[0], end[0]);
-                       segmentmaxs[1] = max(start[1], end[1]);
-                       segmentmaxs[2] = max(start[2], end[2]);
-#endif
-                       nodenum = node->front;
-                       break;
-               case 2:
-#ifdef BIHLINECLIP
-                       // start END START END
-                       frontfrac = frontdist1 / (frontdist1 - frontdist2);
-                       VectorLerp(start, frontfrac, end, clipped[0]);
-                       end = clipped[0];
-                       segmentmins[0] = min(start[0], end[0]);
-                       segmentmins[1] = min(start[1], end[1]);
-                       segmentmins[2] = min(start[2], end[2]);
-                       segmentmaxs[0] = max(start[0], end[0]);
-                       segmentmaxs[1] = max(start[1], end[1]);
-                       segmentmaxs[2] = max(start[2], end[2]);
-#endif
-                       nodenum = node->front;
-                       break;
-               case 3:
-                       // START END START END
-                       return; // line falls in gap between children
-               case 4:
-                       // start end start END
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
-#ifdef BIHLINECLIP
-                       backfrac = backdist1 / (backdist1 - backdist2);
-                       VectorLerp(start, backfrac, end, clipped[0]);
-                       end = clipped[0];
-                       segmentmins[0] = min(start[0], end[0]);
-                       segmentmins[1] = min(start[1], end[1]);
-                       segmentmins[2] = min(start[2], end[2]);
-                       segmentmaxs[0] = max(start[0], end[0]);
-                       segmentmaxs[1] = max(start[1], end[1]);
-                       segmentmaxs[2] = max(start[2], end[2]);
-#endif
-                       nodenum = node->back;
-                       break;
-               case 5:
-                       // START end start END
-#ifdef BIHLINECLIP
-                       frontfrac = frontdist1 / (frontdist1 - frontdist2);
-                       VectorLerp(start, frontfrac, end, clipped[1]);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, clipped[1], end, linestart, lineend);
-                       backfrac = backdist1 / (backdist1 - backdist2);
-                       VectorLerp(start, backfrac, end, clipped[0]);
-                       end = clipped[0];
-                       segmentmins[0] = min(start[0], end[0]);
-                       segmentmins[1] = min(start[1], end[1]);
-                       segmentmins[2] = min(start[2], end[2]);
-                       segmentmaxs[0] = max(start[0], end[0]);
-                       segmentmaxs[1] = max(start[1], end[1]);
-                       segmentmaxs[2] = max(start[2], end[2]);
-#else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
-#endif
-                       nodenum = node->back;
-                       break;
-               case 6:
-                       // start END start END
-#ifdef BIHLINECLIP
-                       frontfrac = frontdist1 / (frontdist1 - frontdist2);
-                       VectorLerp(start, frontfrac, end, clipped[1]);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, clipped[1], linestart, lineend);
-                       backfrac = backdist1 / (backdist1 - backdist2);
-                       VectorLerp(start, backfrac, end, clipped[0]);
-                       end = clipped[0];
-                       segmentmins[0] = min(start[0], end[0]);
-                       segmentmins[1] = min(start[1], end[1]);
-                       segmentmins[2] = min(start[2], end[2]);
-                       segmentmaxs[0] = max(start[0], end[0]);
-                       segmentmaxs[1] = max(start[1], end[1]);
-                       segmentmaxs[2] = max(start[2], end[2]);
-#else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
-#endif
-                       nodenum = node->back;
-                       break;
-               case 7:
-                       // START END start END
-#ifdef BIHLINECLIP
-                       backfrac = backdist1 / (backdist1 - backdist2);
-                       VectorLerp(start, backfrac, end, clipped[0]);
-                       end = clipped[0];
-                       segmentmins[0] = min(start[0], end[0]);
-                       segmentmins[1] = min(start[1], end[1]);
-                       segmentmins[2] = min(start[2], end[2]);
-                       segmentmaxs[0] = max(start[0], end[0]);
-                       segmentmaxs[1] = max(start[1], end[1]);
-                       segmentmaxs[2] = max(start[2], end[2]);
-#endif
-                       nodenum = node->back;
-                       break;
-               case 8:
-                       // start end START end
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
-#ifdef BIHLINECLIP
-                       backfrac = backdist1 / (backdist1 - backdist2);
-                       VectorLerp(start, backfrac, end, clipped[0]);
-                       start = clipped[0];
-                       segmentmins[0] = min(start[0], end[0]);
-                       segmentmins[1] = min(start[1], end[1]);
-                       segmentmins[2] = min(start[2], end[2]);
-                       segmentmaxs[0] = max(start[0], end[0]);
-                       segmentmaxs[1] = max(start[1], end[1]);
-                       segmentmaxs[2] = max(start[2], end[2]);
-#endif
-                       nodenum = node->back;
-                       break;
-               case 9:
-                       // START end START end
-#ifdef BIHLINECLIP
-                       frontfrac = frontdist1 / (frontdist1 - frontdist2);
-                       VectorLerp(start, frontfrac, end, clipped[1]);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, clipped[1], end, linestart, lineend);
-                       backfrac = backdist1 / (backdist1 - backdist2);
-                       VectorLerp(start, backfrac, end, clipped[0]);
-                       start = clipped[0];
-                       segmentmins[0] = min(start[0], end[0]);
-                       segmentmins[1] = min(start[1], end[1]);
-                       segmentmins[2] = min(start[2], end[2]);
-                       segmentmaxs[0] = max(start[0], end[0]);
-                       segmentmaxs[1] = max(start[1], end[1]);
-                       segmentmaxs[2] = max(start[2], end[2]);
-#else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
-#endif
-                       nodenum = node->back;
-                       break;
-               case 10:
-                       // start END START end
-#ifdef BIHLINECLIP
-                       frontfrac = frontdist1 / (frontdist1 - frontdist2);
-                       VectorLerp(start, frontfrac, end, clipped[1]);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, clipped[1], linestart, lineend);
-                       backfrac = backdist1 / (backdist1 - backdist2);
-                       VectorLerp(start, backfrac, end, clipped[0]);
-                       start = clipped[0];
-                       segmentmins[0] = min(start[0], end[0]);
-                       segmentmins[1] = min(start[1], end[1]);
-                       segmentmins[2] = min(start[2], end[2]);
-                       segmentmaxs[0] = max(start[0], end[0]);
-                       segmentmaxs[1] = max(start[1], end[1]);
-                       segmentmaxs[2] = max(start[2], end[2]);
-#else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
-#endif
-                       nodenum = node->back;
-                       break;
-               case 11:
-                       // START END START end
-#ifdef BIHLINECLIP
-                       backfrac = backdist1 / (backdist1 - backdist2);
-                       VectorLerp(start, backfrac, end, clipped[0]);
-                       start = clipped[0];
-                       segmentmins[0] = min(start[0], end[0]);
-                       segmentmins[1] = min(start[1], end[1]);
-                       segmentmins[2] = min(start[2], end[2]);
-                       segmentmaxs[0] = max(start[0], end[0]);
-                       segmentmaxs[1] = max(start[1], end[1]);
-                       segmentmaxs[2] = max(start[2], end[2]);
-#endif
-                       nodenum = node->back;
-                       break;
-               case 12:
-                       // start end start end
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
-                       nodenum = node->back;
-                       break;
-               case 13:
-                       // START end start end
-#ifdef BIHLINECLIP
-                       frontfrac = frontdist1 / (frontdist1 - frontdist2);
-                       VectorLerp(start, frontfrac, end, clipped[1]);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, clipped[1], end, linestart, lineend);
-#else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
-#endif
-                       nodenum = node->back;
-                       break;
-               case 14:
-                       // start END start end
-#ifdef BIHLINECLIP
-                       frontfrac = frontdist1 / (frontdist1 - frontdist2);
-                       VectorLerp(start, frontfrac, end, clipped[1]);
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, clipped[1], linestart, lineend);
-#else
-                       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, node->front, start, end, linestart, lineend);
-#endif
-                       nodenum = node->back;
-                       break;
-               case 15:
-                       // START END start end
-                       nodenum = node->back;
-                       continue;
-               }
-#endif
-#endif
-       }
-       if (!model->collision_bih.leafs)
-               return;
-       leaf = model->collision_bih.leafs + (-1-nodenum);
-#if 1
-       if (!BoxesOverlap(segmentmins, segmentmaxs, leaf->mins, leaf->maxs))
-               return;
-#endif
-       switch(leaf->type)
-       {
-       case BIH_BRUSH:
-               brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
-               Collision_TraceLineBrushFloat(trace, linestart, lineend, brush, brush);
-               break;
-       case BIH_COLLISIONTRIANGLE:
-               if (!mod_q3bsp_curves_collisions.integer)
-                       return;
-               e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
-               texture = model->data_textures + leaf->textureindex;
-               Collision_TraceLineTriangleFloat(trace, linestart, lineend, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
-               break;
-       case BIH_RENDERTRIANGLE:
-               e = model->surfmesh.data_element3i + 3*leaf->itemindex;
-               texture = model->data_textures + leaf->textureindex;
-               Collision_TraceLineTriangleFloat(trace, linestart, lineend, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
-               break;
-       }
-}
+       vec3_t start, end, startmins, startmaxs, endmins, endmaxs, mins, maxs;
+       vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
+       vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
+       int axis, nodenum, nodestackpos = 0, nodestack[1024];
 
-static void Mod_CollisionBIH_TraceBrush_RecursiveBIHNode(trace_t *trace, dp_model_t *model, int nodenum, const colbrushf_t *thisbrush_start, const colbrushf_t *thisbrush_end, const vec3_t segmentmins, const vec3_t segmentmaxs)
-{
-       const bih_leaf_t *leaf;
-       const bih_node_t *node;
-       const colbrushf_t *brush;
-       const int *e;
-       const texture_t *texture;
-       int axis;
-       while (nodenum >= 0)
+       if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(thisbrush_start->mins, thisbrush_start->maxs) && VectorCompare(thisbrush_end->mins, thisbrush_end->maxs))
        {
-               node = model->collision_bih.nodes + nodenum;
-               axis = node->type - BIH_SPLITX;
-#if 1
-               if (!BoxesOverlap(segmentmins, segmentmaxs, node->mins, node->maxs))
-                       return;
-#endif
-#if 0
-               Mod_CollisionBIH_TraceBrush_RecursiveBIHNode(trace, model, node->front, thisbrush_start, thisbrush_end, segmentmins, segmentmaxs);
-               nodenum = node->back;
-               continue;
-#endif
-               if (segmentmins[axis] <= node->backmax)
-               {
-                       if (segmentmaxs[axis] >= node->frontmin)
-                               Mod_CollisionBIH_TraceBrush_RecursiveBIHNode(trace, model, node->front, thisbrush_start, thisbrush_end, segmentmins, segmentmaxs);
-                       nodenum = node->back;
-               }
-               else if (segmentmaxs[axis] >= node->frontmin)
-                       nodenum = node->front;
+               if (VectorCompare(thisbrush_start->mins, thisbrush_end->mins))
+                       Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, thisbrush_start->mins, hitsupercontentsmask);
                else
-                       return; // trace falls between children
-       }
-       if (!model->collision_bih.leafs)
+                       Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, thisbrush_start->mins, thisbrush_end->mins, hitsupercontentsmask);
                return;
-       leaf = model->collision_bih.leafs + (-1-nodenum);
-#if 1
-       if (!BoxesOverlap(segmentmins, segmentmaxs, leaf->mins, leaf->maxs))
-               return;
-#endif
-       switch(leaf->type)
-       {
-       case BIH_BRUSH:
-               brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
-               Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, brush, brush);
-               break;
-       case BIH_COLLISIONTRIANGLE:
-               if (!mod_q3bsp_curves_collisions.integer)
-                       return;
-               e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
-               texture = model->data_textures + leaf->textureindex;
-               Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
-               break;
-       case BIH_RENDERTRIANGLE:
-               e = model->surfmesh.data_element3i + 3*leaf->itemindex;
-               texture = model->data_textures + leaf->textureindex;
-               Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
-               break;
        }
-}
-
-void Mod_CollisionBIH_TracePoint(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask)
-{
-       memset(trace, 0, sizeof(*trace));
-       trace->fraction = 1;
-       trace->realfraction = 1;
-       trace->hitsupercontentsmask = hitsupercontentsmask;
-       Mod_CollisionBIH_TracePoint_RecursiveBIHNode(trace, model, model->collision_bih.rootnode, start);
-}
 
-void Mod_CollisionBIH_TraceLine(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
-{
-       if (VectorCompare(start, end))
-       {
-               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+       bih = &model->collision_bih;
+       if(!bih->nodes)
                return;
-       }
+       nodenum = bih->rootnode;
 
+       // box trace, performed as brush trace
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
-       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, model->collision_bih.rootnode, start, end, start, end);
+
+       // calculate tracebox-like parameters for efficient culling
+       VectorMAM(0.5f, thisbrush_start->mins, 0.5f, thisbrush_start->maxs, start);
+       VectorMAM(0.5f, thisbrush_end->mins, 0.5f, thisbrush_end->maxs, end);
+       VectorSubtract(thisbrush_start->mins, start, startmins);
+       VectorSubtract(thisbrush_start->maxs, start, startmaxs);
+       VectorSubtract(thisbrush_end->mins, end, endmins);
+       VectorSubtract(thisbrush_end->maxs, end, endmaxs);
+       mins[0] = min(startmins[0], endmins[0]);
+       mins[1] = min(startmins[1], endmins[1]);
+       mins[2] = min(startmins[2], endmins[2]);
+       maxs[0] = max(startmaxs[0], endmaxs[0]);
+       maxs[1] = max(startmaxs[1], endmaxs[1]);
+       maxs[2] = max(startmaxs[2], endmaxs[2]);
+
+       // push first node
+       nodestackline[nodestackpos][0] = start[0];
+       nodestackline[nodestackpos][1] = start[1];
+       nodestackline[nodestackpos][2] = start[2];
+       nodestackline[nodestackpos][3] = end[0];
+       nodestackline[nodestackpos][4] = end[1];
+       nodestackline[nodestackpos][5] = end[2];
+       nodestack[nodestackpos++] = nodenum;
+       while (nodestackpos)
+       {
+               nodenum = nodestack[--nodestackpos];
+               node = bih->nodes + nodenum;
+               VectorCopy(nodestackline[nodestackpos], nodestart);
+               VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
+               sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0] - 1;
+               sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1] - 1;
+               sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2] - 1;
+               sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0] + 1;
+               sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1] + 1;
+               sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2] + 1;
+               if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs))
+                       continue;
+               if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
+               {
+                       // recurse children of the split
+                       axis = node->type - BIH_SPLITX;
+                       d1 = node->backmax - nodestart[axis] - mins[axis];
+                       d2 = node->backmax - nodeend[axis] - mins[axis];
+                       d3 = nodestart[axis] - node->frontmin + maxs[axis];
+                       d4 = nodeend[axis] - node->frontmin + maxs[axis];
+                       switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
+                       {
+                       case  0: /* >>>> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  1: /* <>>> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  2: /* ><>> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  4: /* >><> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  5: /* <><> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  6: /* ><<> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  8: /* >>>< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  9: /* <>>< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 10: /* ><>< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
+                       }
+               }
+               else if (node->type == BIH_UNORDERED)
+               {
+                       // calculate sweep bounds for this node
+                       // copy node bounds into local variables and expand to get Minkowski Sum of the two shapes
+                       VectorSubtract(node->mins, maxs, nodebigmins);
+                       VectorSubtract(node->maxs, mins, nodebigmaxs);
+                       // clip line to this node bounds
+                       axis = 0; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       axis = 1; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       axis = 2; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       // some of the line intersected the enlarged node box
+                       // calculate sweep bounds for this node
+                       sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0] - 1;
+                       sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1] - 1;
+                       sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2] - 1;
+                       sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0] + 1;
+                       sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1] + 1;
+                       sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2] + 1;
+                       for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
+                       {
+                               leaf = bih->leafs + node->children[axis];
+                               if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
+                                       continue;
+                               switch(leaf->type)
+                               {
+                               case BIH_BRUSH:
+                                       brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
+                                       Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, brush, brush);
+                                       break;
+                               case BIH_COLLISIONTRIANGLE:
+                                       if (!mod_q3bsp_curves_collisions.integer)
+                                               continue;
+                                       e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               case BIH_RENDERTRIANGLE:
+                                       e = model->surfmesh.data_element3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               }
+                       }
+               }
+       }
 }
 
 void Mod_CollisionBIH_TraceBox(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask)
 {
-       float segmentmins[3], segmentmaxs[3];
        colboxbrushf_t thisbrush_start, thisbrush_end;
        vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
 
-       if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(boxmins, boxmaxs))
-       {
-               vec3_t shiftstart, shiftend;
-               VectorAdd(start, boxmins, shiftstart);
-               VectorAdd(end, boxmins, shiftend);
-               if (VectorCompare(start, end))
-                       Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, shiftstart, hitsupercontentsmask);
-               else
-               {
-                       Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, shiftstart, shiftend, hitsupercontentsmask);
-                       VectorSubtract(trace->endpos, boxmins, trace->endpos);
-               }
-               return;
-       }
-
        // box trace, performed as brush trace
-       memset(trace, 0, sizeof(*trace));
-       trace->fraction = 1;
-       trace->realfraction = 1;
-       trace->hitsupercontentsmask = hitsupercontentsmask;
-       segmentmins[0] = min(start[0], end[0]) + boxmins[0] - 1;
-       segmentmins[1] = min(start[1], end[1]) + boxmins[1] - 1;
-       segmentmins[2] = min(start[2], end[2]) + boxmins[2] - 1;
-       segmentmaxs[0] = max(start[0], end[0]) + boxmaxs[0] + 1;
-       segmentmaxs[1] = max(start[1], end[1]) + boxmaxs[1] + 1;
-       segmentmaxs[2] = max(start[2], end[2]) + boxmaxs[2] + 1;
        VectorAdd(start, boxmins, boxstartmins);
        VectorAdd(start, boxmaxs, boxstartmaxs);
        VectorAdd(end, boxmins, boxendmins);
        VectorAdd(end, boxmaxs, boxendmaxs);
        Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
        Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
-       Mod_CollisionBIH_TraceBrush_RecursiveBIHNode(trace, model, model->collision_bih.rootnode, &thisbrush_start.brush, &thisbrush_end.brush, segmentmins, segmentmaxs);
+       Mod_CollisionBIH_TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask);
 }
 
-int Mod_CollisionBIH_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
+
+static int Mod_CollisionBIH_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
 {
        trace_t trace;
        Mod_CollisionBIH_TracePoint(model, NULL, NULL, &trace, point, 0);
@@ -6202,14 +6580,12 @@ void Mod_CollisionBIH_TracePoint_Mesh(dp_model_t *model, const frameblend_t *fra
 #endif
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
 #if 0
-       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, model->collision_bih.rootnode, start, end, start, end);
+       Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
        hitsupercontents = trace->hitsupercontents;
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
        trace->startsupercontents = hitsupercontents;
 #endif
@@ -6224,9 +6600,8 @@ int Mod_CollisionBIH_PointSuperContents_Mesh(struct model_s *model, int frame, c
        VectorSet(end, start[0], start[1], model->normalmins[2]);
        memset(&trace, 0, sizeof(trace));
        trace.fraction = 1;
-       trace.realfraction = 1;
        trace.hitsupercontentsmask = 0;
-       Mod_CollisionBIH_TraceLine_RecursiveBIHNode(&trace, model, model->collision_bih.rootnode, start, end, start, end);
+       Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
        return trace.hitsupercontents;
 #else
        return 0;
@@ -6306,7 +6681,7 @@ static void Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace_t *trace, dp_model_t *mod
                        Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, node->children[startside], start, mid, startfrac, midfrac, linestart, lineend, markframe, segmentmins, segmentmaxs);
                        // if we found an impact on the front side, don't waste time
                        // exploring the far side
-                       if (midfrac <= trace->realfraction)
+                       if (midfrac <= trace->fraction)
                                Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, node->children[endside], mid, end, midfrac, endfrac, linestart, lineend, markframe, segmentmins, segmentmaxs);
                        return;
                }
@@ -6454,10 +6829,9 @@ static void Mod_Q3BSP_TracePoint(dp_model_t *model, const frameblend_t *frameble
        q3mbrush_t *brush;
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
        if (mod_collision_bih.integer)
-               Mod_CollisionBIH_TracePoint_RecursiveBIHNode(trace, model, model->collision_bih.rootnode, start);
+               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
        else if (model->brush.submodel)
        {
                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
@@ -6483,7 +6857,6 @@ static void Mod_Q3BSP_TraceLine(dp_model_t *model, const frameblend_t *frameblen
 
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
        segmentmins[0] = min(start[0], end[0]) - 1;
        segmentmins[1] = min(start[1], end[1]) - 1;
@@ -6492,7 +6865,7 @@ static void Mod_Q3BSP_TraceLine(dp_model_t *model, const frameblend_t *frameblen
        segmentmaxs[1] = max(start[1], end[1]) + 1;
        segmentmaxs[2] = max(start[2], end[2]) + 1;
        if (mod_collision_bih.integer)
-               Mod_CollisionBIH_TraceLine_RecursiveBIHNode(trace, model, model->collision_bih.rootnode, start, end, start, end);
+               Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
        else if (model->brush.submodel)
        {
                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
@@ -6507,61 +6880,61 @@ static void Mod_Q3BSP_TraceLine(dp_model_t *model, const frameblend_t *frameblen
                Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, model->brush.data_nodes, start, end, 0, 1, start, end, ++markframe, segmentmins, segmentmaxs);
 }
 
-static void Mod_Q3BSP_TraceBox(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask)
+static void Mod_Q3BSP_TraceBrush(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, colbrushf_t *start, colbrushf_t *end, int hitsupercontentsmask)
 {
-       int i;
        float segmentmins[3], segmentmaxs[3];
+       int i;
        msurface_t *surface;
        q3mbrush_t *brush;
-       colboxbrushf_t thisbrush_start, thisbrush_end;
-       vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
 
-       if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(boxmins, boxmaxs))
+       if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(start->mins, start->maxs) && VectorCompare(end->mins, end->maxs))
        {
-               vec3_t shiftstart, shiftend;
-               VectorAdd(start, boxmins, shiftstart);
-               VectorAdd(end, boxmins, shiftend);
-               if (VectorCompare(start, end))
-                       Mod_Q3BSP_TracePoint(model, frameblend, skeleton, trace, shiftstart, hitsupercontentsmask);
+               if (VectorCompare(start->mins, end->mins))
+                       Mod_Q3BSP_TracePoint(model, frameblend, skeleton, trace, start->mins, hitsupercontentsmask);
                else
-               {
-                       Mod_Q3BSP_TraceLine(model, frameblend, skeleton, trace, shiftstart, shiftend, hitsupercontentsmask);
-                       VectorSubtract(trace->endpos, boxmins, trace->endpos);
-               }
+                       Mod_Q3BSP_TraceLine(model, frameblend, skeleton, trace, start->mins, end->mins, hitsupercontentsmask);
                return;
        }
 
        // box trace, performed as brush trace
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
-       segmentmins[0] = min(start[0], end[0]) + boxmins[0] - 1;
-       segmentmins[1] = min(start[1], end[1]) + boxmins[1] - 1;
-       segmentmins[2] = min(start[2], end[2]) + boxmins[2] - 1;
-       segmentmaxs[0] = max(start[0], end[0]) + boxmaxs[0] + 1;
-       segmentmaxs[1] = max(start[1], end[1]) + boxmaxs[1] + 1;
-       segmentmaxs[2] = max(start[2], end[2]) + boxmaxs[2] + 1;
-       VectorAdd(start, boxmins, boxstartmins);
-       VectorAdd(start, boxmaxs, boxstartmaxs);
-       VectorAdd(end, boxmins, boxendmins);
-       VectorAdd(end, boxmaxs, boxendmaxs);
-       Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
-       Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
+       segmentmins[0] = min(start->mins[0], end->mins[0]) - 1;
+       segmentmins[1] = min(start->mins[1], end->mins[1]) - 1;
+       segmentmins[2] = min(start->mins[2], end->mins[2]) - 1;
+       segmentmaxs[0] = max(start->maxs[0], end->maxs[0]) + 1;
+       segmentmaxs[1] = max(start->maxs[1], end->maxs[1]) + 1;
+       segmentmaxs[2] = max(start->maxs[2], end->maxs[2]) + 1;
        if (mod_collision_bih.integer)
-               Mod_CollisionBIH_TraceBrush_RecursiveBIHNode(trace, model, model->collision_bih.rootnode, &thisbrush_start.brush, &thisbrush_end.brush, segmentmins, segmentmaxs);
+               Mod_CollisionBIH_TraceBrush(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
        else if (model->brush.submodel)
        {
                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
                        if (brush->colbrushf && BoxesOverlap(segmentmins, segmentmaxs, brush->colbrushf->mins, brush->colbrushf->maxs))
-                               Collision_TraceBrushBrushFloat(trace, &thisbrush_start.brush, &thisbrush_end.brush, brush->colbrushf, brush->colbrushf);
+                               Collision_TraceBrushBrushFloat(trace, start, end, brush->colbrushf, brush->colbrushf);
                if (mod_q3bsp_curves_collisions.integer)
                        for (i = 0, surface = model->data_surfaces + model->firstmodelsurface;i < model->nummodelsurfaces;i++, surface++)
                                if (surface->num_collisiontriangles && BoxesOverlap(segmentmins, segmentmaxs, surface->mins, surface->maxs))
-                                       Collision_TraceBrushTriangleMeshFloat(trace, &thisbrush_start.brush, &thisbrush_end.brush, surface->num_collisiontriangles, surface->deprecatedq3data_collisionelement3i, surface->deprecatedq3data_collisionvertex3f, surface->deprecatedq3num_collisionbboxstride, surface->deprecatedq3data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
+                                       Collision_TraceBrushTriangleMeshFloat(trace, start, end, surface->num_collisiontriangles, surface->deprecatedq3data_collisionelement3i, surface->deprecatedq3data_collisionvertex3f, surface->deprecatedq3num_collisionbboxstride, surface->deprecatedq3data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
        }
        else
-               Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace, model, model->brush.data_nodes, &thisbrush_start.brush, &thisbrush_end.brush, ++markframe, segmentmins, segmentmaxs);
+               Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace, model, model->brush.data_nodes, start, end, ++markframe, segmentmins, segmentmaxs);
+}
+
+static void Mod_Q3BSP_TraceBox(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask)
+{
+       colboxbrushf_t thisbrush_start, thisbrush_end;
+       vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
+
+       // box trace, performed as brush trace
+       VectorAdd(start, boxmins, boxstartmins);
+       VectorAdd(start, boxmaxs, boxstartmaxs);
+       VectorAdd(end, boxmins, boxendmins);
+       VectorAdd(end, boxmaxs, boxendmaxs);
+       Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
+       Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
+       Mod_Q3BSP_TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask);
 }
 
 static int Mod_Q3BSP_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
@@ -6571,9 +6944,7 @@ static int Mod_Q3BSP_PointSuperContents(struct model_s *model, int frame, const
        q3mbrush_t *brush;
        if (mod_collision_bih.integer)
        {
-               trace_t trace;
-               Mod_Q3BSP_TracePoint(model, NULL, NULL, &trace, point, 0);
-               supercontents = trace.startsupercontents;
+               supercontents = Mod_CollisionBIH_PointSuperContents(model, frame, point);
        }
        // test if the point is inside each brush
        else if (model->brush.submodel)
@@ -6602,7 +6973,13 @@ static int Mod_Q3BSP_PointSuperContents(struct model_s *model, int frame, const
        return supercontents;
 }
 
-void Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces)
+void Mod_CollisionBIH_TraceLineAgainstSurfaces(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
+{
+       Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, &model->render_bih);
+}
+
+
+bih_t *Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces, bih_t *out)
 {
        int j;
        int bihnumleafs;
@@ -6639,17 +7016,17 @@ void Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces)
                for (j = 0, surface = model->data_surfaces + model->firstmodelsurface;j < nummodelsurfaces;j++, surface++)
                {
                        if (surface->texture->basematerialflags & MATERIALFLAG_MESHCOLLISIONS)
-                               bihnumleafs += surface->num_triangles;
+                               bihnumleafs += surface->num_triangles + surface->num_collisiontriangles;
                        else
                                bihnumleafs += surface->num_collisiontriangles;
                }
        }
 
        if (!bihnumleafs)
-               return;
+               return NULL;
 
        // allocate the memory for the BIH leaf nodes
-       bihleafs = Mem_Alloc(loadmodel->mempool, sizeof(bih_leaf_t) * bihnumleafs);
+       bihleafs = (bih_leaf_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_leaf_t) * bihnumleafs);
 
        // now populate the BIH leaf nodes
        bihleafindex = 0;
@@ -6665,6 +7042,7 @@ void Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces)
                                continue;
                        bihleafs[bihleafindex].type = BIH_RENDERTRIANGLE;
                        bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
+                       bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
                        bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firsttriangle;
                        bihleafs[bihleafindex].mins[0] = min(rendervertex3f[3*e[0]+0], min(rendervertex3f[3*e[1]+0], rendervertex3f[3*e[2]+0])) - 1;
                        bihleafs[bihleafindex].mins[1] = min(rendervertex3f[3*e[0]+1], min(rendervertex3f[3*e[1]+1], rendervertex3f[3*e[2]+1])) - 1;
@@ -6685,6 +7063,7 @@ void Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces)
                                continue;
                        bihleafs[bihleafindex].type = BIH_BRUSH;
                        bihleafs[bihleafindex].textureindex = brush->texture - model->data_textures;
+                       bihleafs[bihleafindex].surfaceindex = -1;
                        bihleafs[bihleafindex].itemindex = brushindex+model->firstmodelbrush;
                        VectorCopy(brush->colbrushf->mins, bihleafs[bihleafindex].mins);
                        VectorCopy(brush->colbrushf->maxs, bihleafs[bihleafindex].maxs);
@@ -6700,6 +7079,7 @@ void Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces)
                        {
                                bihleafs[bihleafindex].type = BIH_COLLISIONTRIANGLE;
                                bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
+                               bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
                                bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firstcollisiontriangle;
                                bihleafs[bihleafindex].mins[0] = min(collisionvertex3f[3*e[0]+0], min(collisionvertex3f[3*e[1]+0], collisionvertex3f[3*e[2]+0])) - 1;
                                bihleafs[bihleafindex].mins[1] = min(collisionvertex3f[3*e[0]+1], min(collisionvertex3f[3*e[1]+1], collisionvertex3f[3*e[2]+1])) - 1;
@@ -6713,23 +7093,25 @@ void Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces)
        }
 
        // allocate buffers for the produced and temporary data
-       bihmaxnodes = bihnumleafs - 1;
-       bihnodes = Mem_Alloc(loadmodel->mempool, sizeof(bih_node_t) * bihmaxnodes);
-       temp_leafsort = Mem_Alloc(loadmodel->mempool, sizeof(int) * bihnumleafs * 2);
+       bihmaxnodes = bihnumleafs + 1;
+       bihnodes = (bih_node_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_node_t) * bihmaxnodes);
+       temp_leafsort = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * bihnumleafs * 2);
        temp_leafsortscratch = temp_leafsort + bihnumleafs;
 
        // now build it
-       BIH_Build(&model->collision_bih, bihnumleafs, bihleafs, bihmaxnodes, bihnodes, temp_leafsort, temp_leafsortscratch);
+       BIH_Build(out, bihnumleafs, bihleafs, bihmaxnodes, bihnodes, temp_leafsort, temp_leafsortscratch);
 
        // we're done with the temporary data
        Mem_Free(temp_leafsort);
 
        // resize the BIH nodes array if it over-allocated
-       if (model->collision_bih.maxnodes > model->collision_bih.numnodes)
+       if (out->maxnodes > out->numnodes)
        {
-               model->collision_bih.maxnodes = model->collision_bih.numnodes;
-               model->collision_bih.nodes = Mem_Realloc(loadmodel->mempool, model->collision_bih.nodes, model->collision_bih.numnodes * sizeof(bih_node_t));
+               out->maxnodes = out->numnodes;
+               out->nodes = (bih_node_t *)Mem_Realloc(loadmodel->mempool, out->nodes, out->numnodes * sizeof(bih_node_t));
        }
+
+       return out;
 }
 
 static int Mod_Q3BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativecontents)
@@ -6792,7 +7174,7 @@ static int Mod_Q3BSP_NativeContentsFromSuperContents(dp_model_t *model, int supe
        return nativecontents;
 }
 
-void Mod_Q3BSP_RecursiveFindNumLeafs(mnode_t *node)
+static void Mod_Q3BSP_RecursiveFindNumLeafs(mnode_t *node)
 {
        int numleafs;
        while (node->plane)
@@ -6805,12 +7187,11 @@ void Mod_Q3BSP_RecursiveFindNumLeafs(mnode_t *node)
                loadmodel->brush.num_leafs = numleafs;
 }
 
-void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
+static void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
-       int i, j, numshadowmeshtriangles, lumps;
+       int i, j, lumps;
        q3dheader_t *header;
        float corner[3], yawradius, modelradius;
-       msurface_t *surface;
 
        mod->modeldatatypestring = "Q3BSP";
 
@@ -6828,9 +7209,11 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 
        mod->soundfromcenter = true;
        mod->TraceBox = Mod_Q3BSP_TraceBox;
+       mod->TraceBrush = Mod_Q3BSP_TraceBrush;
        mod->TraceLine = Mod_Q3BSP_TraceLine;
        mod->TracePoint = Mod_Q3BSP_TracePoint;
        mod->PointSuperContents = Mod_Q3BSP_PointSuperContents;
+       mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
        mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
        mod->brush.SuperContentsFromNativeContents = Mod_Q3BSP_SuperContentsFromNativeContents;
        mod->brush.NativeContentsFromSuperContents = Mod_Q3BSP_NativeContentsFromSuperContents;
@@ -6922,28 +7305,14 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        loadmodel->brush.numsubmodels = loadmodel->brushq3.num_models;
 
        // the MakePortals code works fine on the q3bsp data as well
-       Mod_Q1BSP_MakePortals();
+       if (mod_bsp_portalize.integer)
+               Mod_Q1BSP_MakePortals();
 
        // FIXME: shader alpha should replace r_wateralpha support in q3bsp
        loadmodel->brush.supportwateralpha = true;
 
        // make a single combined shadow mesh to allow optimized shadow volume creation
-       numshadowmeshtriangles = 0;
-       if (cls.state != ca_dedicated)
-       {
-               for (j = 0, surface = loadmodel->data_surfaces;j < loadmodel->num_surfaces;j++, surface++)
-               {
-                       surface->num_firstshadowmeshtriangle = numshadowmeshtriangles;
-                       numshadowmeshtriangles += surface->num_triangles;
-               }
-               loadmodel->brush.shadowmesh = Mod_ShadowMesh_Begin(loadmodel->mempool, numshadowmeshtriangles * 3, numshadowmeshtriangles, NULL, NULL, NULL, false, false, true);
-               for (j = 0, surface = loadmodel->data_surfaces;j < loadmodel->num_surfaces;j++, surface++)
-                       if (surface->num_triangles > 0)
-                               Mod_ShadowMesh_AddMesh(loadmodel->mempool, loadmodel->brush.shadowmesh, NULL, NULL, NULL, loadmodel->surfmesh.data_vertex3f, NULL, NULL, NULL, NULL, surface->num_triangles, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
-               loadmodel->brush.shadowmesh = Mod_ShadowMesh_Finish(loadmodel->mempool, loadmodel->brush.shadowmesh, false, true, false);
-               if (loadmodel->brush.shadowmesh)
-                       Mod_BuildTriangleNeighbors(loadmodel->brush.shadowmesh->neighbor3i, loadmodel->brush.shadowmesh->element3i, loadmodel->brush.shadowmesh->numtriangles);
-       }
+       Mod_Q1BSP_CreateShadowMesh(loadmodel);
 
        loadmodel->brush.num_leafs = 0;
        Mod_Q3BSP_RecursiveFindNumLeafs(loadmodel->brush.data_nodes);
@@ -7045,13 +7414,38 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                if (j < mod->nummodelsurfaces)
                        mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
 
-               Mod_MakeCollisionBIH(mod, false);
+               Mod_MakeCollisionBIH(mod, false, &mod->collision_bih);
+               Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
 
                // generate VBOs and other shared data before cloning submodels
                if (i == 0)
                        Mod_BuildVBOs();
        }
 
+       if (mod_q3bsp_sRGBlightmaps.integer)
+       {
+               if (vid_sRGB.integer && vid_sRGB_fallback.integer && !vid.sRGB3D)
+               {
+                       // actually we do in sRGB fallback with sRGB lightmaps: Image_sRGBFloatFromLinear_Lightmap(Image_LinearFloatFromsRGBFloat(x))
+                       // neutral point is at Image_sRGBFloatFromLinearFloat(0.5)
+                       // so we need to map Image_sRGBFloatFromLinearFloat(0.5) to 0.5
+                       // factor is 0.5 / Image_sRGBFloatFromLinearFloat(0.5)
+                       //loadmodel->lightmapscale *= 0.679942f; // fixes neutral level
+               }
+               else // if this is NOT set, regular rendering looks right by this requirement anyway
+               {
+                       /*
+                       // we want color 1 to do the same as without sRGB
+                       // so, we want to map 1 to Image_LinearFloatFromsRGBFloat(2) instead of to 2
+                       loadmodel->lightmapscale *= 2.476923f; // fixes max level
+                       */
+
+                       // neutral level 0.5 gets uploaded as sRGB and becomes Image_LinearFloatFromsRGBFloat(0.5)
+                       // we need to undo that
+                       loadmodel->lightmapscale *= 2.336f; // fixes neutral level
+               }
+       }
+
        Con_DPrintf("Stats for q3bsp model \"%s\": %i faces, %i nodes, %i leafs, %i clusters, %i clusterportals, mesh: %i vertices, %i triangles, %i surfaces\n", loadmodel->name, loadmodel->num_surfaces, loadmodel->brush.num_nodes, loadmodel->brush.num_leafs, mod->brush.num_pvsclusters, loadmodel->brush.num_portals, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->num_surfaces);
 }
 
@@ -7071,12 +7465,10 @@ void Mod_MAP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        Host_Error("Mod_MAP_Load: not yet implemented");
 }
 
-#define OBJASMODEL
-
-#ifdef OBJASMODEL
 typedef struct objvertex_s
 {
        int nextindex;
+       int submodelindex;
        int textureindex;
        float v[3];
        float vt[2];
@@ -7084,6 +7476,8 @@ typedef struct objvertex_s
 }
 objvertex_t;
 
+static unsigned char nobsp_pvs[1] = {1};
+
 void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
        const char *textbase = (char *)buffer, *text = textbase;
@@ -7091,7 +7485,7 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        char *argv[512];
        char line[1024];
        char materialname[MAX_QPATH];
-       int i, j, numvertices, firstvertex, firsttriangle, elementindex, vertexindex, numsurfaces, surfacevertices, surfacetriangles, surfaceelements;
+       int i, j, l, numvertices, firstvertex, firsttriangle, elementindex, vertexindex, surfacevertices, surfacetriangles, surfaceelements, submodelindex = 0;
        int index1, index2, index3;
        objvertex_t vfirst, vprev, vcurrent;
        int argc;
@@ -7105,12 +7499,13 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        int maxvt = 0, numvt = 1;
        int maxvn = 0, numvn = 1;
        char *texturenames = NULL;
-       float dist, modelradius, modelyawradius;
+       float dist, modelradius, modelyawradius, yawradius;
        float *v = NULL;
        float *vt = NULL;
        float *vn = NULL;
        float mins[3];
        float maxs[3];
+       float corner[3];
        objvertex_t *thisvertex = NULL;
        int vertexhashindex;
        int *vertexhashtable = NULL;
@@ -7120,6 +7515,9 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        int vertexhashcount = 0;
        skinfile_t *skinfiles = NULL;
        unsigned char *data = NULL;
+       int *submodelfirstsurface;
+       msurface_t *surface;
+       msurface_t *tempsurfaces;
 
        memset(&vfirst, 0, sizeof(vfirst));
        memset(&vprev, 0, sizeof(vprev));
@@ -7132,8 +7530,10 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        loadmodel->type = mod_obj;
        loadmodel->soundfromcenter = true;
        loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
+       loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
        loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
        loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
+       loadmodel->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
        loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
        loadmodel->brush.TraceLineOfSight = NULL;
        loadmodel->brush.SuperContentsFromNativeContents = NULL;
@@ -7177,9 +7577,13 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        VectorClear(mins);
        VectorClear(maxs);
 
+       // we always have model 0, i.e. the first "submodel"
+       loadmodel->brush.numsubmodels = 1;
+
        // parse the OBJ text now
        for(;;)
        {
+               static char emptyarg[1] = "";
                if (!*text)
                        break;
                linenumber++;
@@ -7188,7 +7592,7 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                        line[linelen] = text[linelen];
                line[linelen] = 0;
                for (argc = 0;argc < 4;argc++)
-                       argv[argc] = "";
+                       argv[argc] = emptyarg;
                argc = 0;
                s = line;
                while (*s == ' ' || *s == '\t')
@@ -7220,9 +7624,18 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                                maxv = max(maxv * 2, 1024);
                                v = (float *)Mem_Realloc(tempmempool, v, maxv * sizeof(float[3]));
                        }
-                       v[numv*3+0] = atof(argv[1]);
-                       v[numv*3+2] = atof(argv[2]);
-                       v[numv*3+1] = atof(argv[3]);
+                       if(mod_obj_orientation.integer)
+                       {
+                               v[numv*3+0] = atof(argv[1]);
+                               v[numv*3+2] = atof(argv[2]);
+                               v[numv*3+1] = atof(argv[3]);
+                       }
+                       else
+                       {
+                               v[numv*3+0] = atof(argv[1]);
+                               v[numv*3+1] = atof(argv[2]);
+                               v[numv*3+2] = atof(argv[3]);
+                       }
                        numv++;
                }
                else if (!strcmp(argv[0], "vt"))
@@ -7243,9 +7656,18 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                                maxvn = max(maxvn * 2, 1024);
                                vn = (float *)Mem_Realloc(tempmempool, vn, maxvn * sizeof(float[3]));
                        }
-                       vn[numvn*3+0] = atof(argv[1]);
-                       vn[numvn*3+2] = atof(argv[2]);
-                       vn[numvn*3+1] = atof(argv[3]);
+                       if(mod_obj_orientation.integer)
+                       {
+                               vn[numvn*3+0] = atof(argv[1]);
+                               vn[numvn*3+2] = atof(argv[2]);
+                               vn[numvn*3+1] = atof(argv[3]);
+                       }
+                       else
+                       {
+                               vn[numvn*3+0] = atof(argv[1]);
+                               vn[numvn*3+1] = atof(argv[2]);
+                               vn[numvn*3+2] = atof(argv[3]);
+                       }
                        numvn++;
                }
                else if (!strcmp(argv[0], "f"))
@@ -7284,9 +7706,13 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                                        index3 = numvn - index3;
                                vcurrent.nextindex = -1;
                                vcurrent.textureindex = textureindex;
-                               VectorCopy(v + 3*index1, vcurrent.v);
-                               Vector2Copy(vt + 2*index2, vcurrent.vt);
-                               VectorCopy(vn + 3*index3, vcurrent.vn);
+                               vcurrent.submodelindex = submodelindex;
+                               if (v && index1 >= 0 && index1 < numv)
+                                       VectorCopy(v + 3*index1, vcurrent.v);
+                               if (vt && index2 >= 0 && index2 < numvt)
+                                       Vector2Copy(vt + 2*index2, vcurrent.vt);
+                               if (vn && index3 >= 0 && index3 < numvn)
+                                       VectorCopy(vn + 3*index3, vcurrent.vn);
                                if (numtriangles == 0)
                                {
                                        VectorCopy(vcurrent.v, mins);
@@ -7310,16 +7736,28 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                                                maxtriangles = max(maxtriangles * 2, 32768);
                                                vertices = (objvertex_t*)Mem_Realloc(loadmodel->mempool, vertices, maxtriangles * sizeof(objvertex_t[3]));
                                        }
-                                       vertices[numtriangles*3+0] = vfirst;
-                                       vertices[numtriangles*3+1] = vprev;
-                                       vertices[numtriangles*3+2] = vcurrent;
+                                       if(mod_obj_orientation.integer)
+                                       {
+                                               vertices[numtriangles*3+0] = vfirst;
+                                               vertices[numtriangles*3+1] = vprev;
+                                               vertices[numtriangles*3+2] = vcurrent;
+                                       }
+                                       else
+                                       {
+                                               vertices[numtriangles*3+0] = vfirst;
+                                               vertices[numtriangles*3+2] = vprev;
+                                               vertices[numtriangles*3+1] = vcurrent;
+                                       }
                                        numtriangles++;
                                }
                                vprev = vcurrent;
                        }
                }
                else if (!strcmp(argv[0], "o") || !strcmp(argv[0], "g"))
-                       ;
+               {
+                       submodelindex = atof(argv[1]);
+                       loadmodel->brush.numsubmodels = max(submodelindex + 1, loadmodel->brush.numsubmodels);
+               }
                else if (!strcmp(argv[0], "usemtl"))
                {
                        for (i = 0;i < numtextures;i++)
@@ -7362,78 +7800,107 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        loadmodel->radius2 = modelradius * modelradius;
 
        // allocate storage for triangles
-       loadmodel->num_surfaces = loadmodel->nummodelsurfaces = numsurfaces = numtextures;
-       loadmodel->surfmesh.data_element3i = Mem_Alloc(loadmodel->mempool, numtriangles * sizeof(int[3]));
-       loadmodel->data_surfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(msurface_t));
+       loadmodel->surfmesh.data_element3i = (int *)Mem_Alloc(loadmodel->mempool, numtriangles * sizeof(int[3]));
        // allocate vertex hash structures to build an optimal vertex subset
        vertexhashsize = numtriangles*2;
-       vertexhashtable = Mem_Alloc(loadmodel->mempool, sizeof(int) * vertexhashsize);
+       vertexhashtable = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * vertexhashsize);
        memset(vertexhashtable, 0xFF, sizeof(int) * vertexhashsize);
-       vertexhashdata = Mem_Alloc(loadmodel->mempool, sizeof(*vertexhashdata) * numtriangles*3);
+       vertexhashdata = (objvertex_t *)Mem_Alloc(loadmodel->mempool, sizeof(*vertexhashdata) * numtriangles*3);
        vertexhashcount = 0;
 
        // gather surface stats for assigning vertex/triangle ranges
        firstvertex = 0;
        firsttriangle = 0;
        elementindex = 0;
-       for (textureindex = 0;textureindex < numtextures;textureindex++)
+       loadmodel->num_surfaces = 0;
+       // allocate storage for the worst case number of surfaces, later we resize
+       tempsurfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, numtextures * loadmodel->brush.numsubmodels * sizeof(msurface_t));
+       submodelfirstsurface = (int *)Mem_Alloc(loadmodel->mempool, (loadmodel->brush.numsubmodels+1) * sizeof(int));
+       surface = tempsurfaces;
+       for (submodelindex = 0;submodelindex < loadmodel->brush.numsubmodels;submodelindex++)
        {
-               msurface_t *surface = loadmodel->data_surfaces + textureindex;
-               // copy the mins/maxs of the model backwards so that the first vertex
-               // added will set the surface bounds to a point
-               VectorCopy(loadmodel->normalmaxs, surface->mins);
-               VectorCopy(loadmodel->normalmins, surface->maxs);
-               surfacevertices = 0;
-               surfaceelements = 0;
-               for (vertexindex = 0;vertexindex < numtriangles*3;vertexindex++)
-               {
-                       thisvertex = vertices + vertexindex;
-                       if (thisvertex->textureindex != textureindex)
-                               continue;
-                       surface->mins[0] = min(surface->mins[0], thisvertex->v[0]);
-                       surface->mins[1] = min(surface->mins[1], thisvertex->v[1]);
-                       surface->mins[2] = min(surface->mins[2], thisvertex->v[2]);
-                       surface->maxs[0] = max(surface->maxs[0], thisvertex->v[0]);
-                       surface->maxs[1] = max(surface->maxs[1], thisvertex->v[1]);
-                       surface->maxs[2] = max(surface->maxs[2], thisvertex->v[2]);
-                       vertexhashindex = (unsigned int)(thisvertex->v[0] * 3571 + thisvertex->v[0] * 1777 + thisvertex->v[0] * 457) % (unsigned int)vertexhashsize;
-                       for (i = vertexhashtable[vertexhashindex];i >= 0;i = vertexhashdata[i].nextindex)
+               submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
+               for (textureindex = 0;textureindex < numtextures;textureindex++)
+               {
+                       for (vertexindex = 0;vertexindex < numtriangles*3;vertexindex++)
                        {
-                               vdata = vertexhashdata + i;
-                               if (vdata->textureindex == thisvertex->textureindex && VectorCompare(thisvertex->v, vdata->v) && VectorCompare(thisvertex->vn, vdata->vn) && Vector2Compare(thisvertex->vt, vdata->vt))
+                               thisvertex = vertices + vertexindex;
+                               if (thisvertex->submodelindex == submodelindex && thisvertex->textureindex == textureindex)
                                        break;
                        }
-                       if (i < 0)
+                       // skip the surface creation if there are no triangles for it
+                       if (vertexindex == numtriangles*3)
+                               continue;
+                       // create a surface for these vertices
+                       surfacevertices = 0;
+                       surfaceelements = 0;
+                       // we hack in a texture index in the surface to be fixed up later...
+                       surface->texture = (texture_t *)((size_t)textureindex);
+                       // calculate bounds as we go
+                       VectorCopy(thisvertex->v, surface->mins);
+                       VectorCopy(thisvertex->v, surface->maxs);
+                       for (;vertexindex < numtriangles*3;vertexindex++)
                        {
-                               i = vertexhashcount++;
-                               vdata = vertexhashdata + i;
-                               *vdata = *thisvertex;
-                               vdata->nextindex = vertexhashtable[vertexhashindex];
-                               vertexhashtable[vertexhashindex] = i;
-                               surfacevertices++;
+                               thisvertex = vertices + vertexindex;
+                               if (thisvertex->submodelindex != submodelindex)
+                                       continue;
+                               if (thisvertex->textureindex != textureindex)
+                                       continue;
+                               // add vertex to surface bounds
+                               surface->mins[0] = min(surface->mins[0], thisvertex->v[0]);
+                               surface->mins[1] = min(surface->mins[1], thisvertex->v[1]);
+                               surface->mins[2] = min(surface->mins[2], thisvertex->v[2]);
+                               surface->maxs[0] = max(surface->maxs[0], thisvertex->v[0]);
+                               surface->maxs[1] = max(surface->maxs[1], thisvertex->v[1]);
+                               surface->maxs[2] = max(surface->maxs[2], thisvertex->v[2]);
+                               // add the vertex if it is not found in the merged set, and
+                               // get its index (triangle element) for the surface
+                               vertexhashindex = (unsigned int)(thisvertex->v[0] * 3571 + thisvertex->v[0] * 1777 + thisvertex->v[0] * 457) % (unsigned int)vertexhashsize;
+                               for (i = vertexhashtable[vertexhashindex];i >= 0;i = vertexhashdata[i].nextindex)
+                               {
+                                       vdata = vertexhashdata + i;
+                                       if (vdata->submodelindex == thisvertex->submodelindex && vdata->textureindex == thisvertex->textureindex && VectorCompare(thisvertex->v, vdata->v) && VectorCompare(thisvertex->vn, vdata->vn) && Vector2Compare(thisvertex->vt, vdata->vt))
+                                               break;
+                               }
+                               if (i < 0)
+                               {
+                                       i = vertexhashcount++;
+                                       vdata = vertexhashdata + i;
+                                       *vdata = *thisvertex;
+                                       vdata->nextindex = vertexhashtable[vertexhashindex];
+                                       vertexhashtable[vertexhashindex] = i;
+                                       surfacevertices++;
+                               }
+                               loadmodel->surfmesh.data_element3i[elementindex++] = i;
+                               surfaceelements++;
                        }
-                       loadmodel->surfmesh.data_element3i[elementindex++] = i;
-                       surfaceelements++;
-               }
-               surfacetriangles = surfaceelements / 3;
-               surface->num_vertices = surfacevertices;
-               surface->num_triangles = surfacetriangles;
-               surface->num_firstvertex = firstvertex;
-               surface->num_firsttriangle = firsttriangle;
-               firstvertex += surface->num_vertices;
-               firsttriangle += surface->num_triangles;
-       }
+                       surfacetriangles = surfaceelements / 3;
+                       surface->num_vertices = surfacevertices;
+                       surface->num_triangles = surfacetriangles;
+                       surface->num_firstvertex = firstvertex;
+                       surface->num_firsttriangle = firsttriangle;
+                       firstvertex += surface->num_vertices;
+                       firsttriangle += surface->num_triangles;
+                       surface++;
+                       loadmodel->num_surfaces++;
+               }
+       }
+       submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
        numvertices = firstvertex;
+       loadmodel->data_surfaces = (msurface_t *)Mem_Realloc(loadmodel->mempool, tempsurfaces, loadmodel->num_surfaces * sizeof(msurface_t));
+       tempsurfaces = NULL;
 
        // allocate storage for final mesh data
        loadmodel->num_textures = numtextures * loadmodel->numskins;
        loadmodel->num_texturesperskin = numtextures;
-       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, numsurfaces * sizeof(int) + numsurfaces * loadmodel->numskins * sizeof(texture_t) + numtriangles * sizeof(int[3]) + (numvertices <= 65536 ? numtriangles * sizeof(unsigned short[3]) : 0) + numvertices * sizeof(float[14]));
-       loadmodel->sortedmodelsurfaces = (int *)data;data += numsurfaces * sizeof(int);
-       loadmodel->data_textures = (texture_t *)data;data += numsurfaces * loadmodel->numskins * sizeof(texture_t);
+       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(int) + loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t) + numtriangles * sizeof(int[3]) + (numvertices <= 65536 ? numtriangles * sizeof(unsigned short[3]) : 0) + (r_enableshadowvolumes.integer ? numtriangles * sizeof(int[3]) : 0) + numvertices * sizeof(float[14]) + loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
+       loadmodel->brush.submodels = (dp_model_t **)data;data += loadmodel->brush.numsubmodels * sizeof(dp_model_t *);
+       loadmodel->sortedmodelsurfaces = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
+       loadmodel->data_textures = (texture_t *)data;data += loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t);
        loadmodel->surfmesh.num_vertices = numvertices;
        loadmodel->surfmesh.num_triangles = numtriangles;
-       loadmodel->surfmesh.data_neighbor3i = (int *)data;data += numtriangles * sizeof(int[3]);
+       if (r_enableshadowvolumes.integer)
+               loadmodel->surfmesh.data_neighbor3i = (int *)data;data += numtriangles * sizeof(int[3]);
        loadmodel->surfmesh.data_vertex3f = (float *)data;data += numvertices * sizeof(float[3]);
        loadmodel->surfmesh.data_svector3f = (float *)data;data += numvertices * sizeof(float[3]);
        loadmodel->surfmesh.data_tvector3f = (float *)data;data += numvertices * sizeof(float[3]);
@@ -7454,12 +7921,9 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures + textureindex, skinfiles, texturenames + textureindex*MAX_QPATH, texturenames + textureindex*MAX_QPATH);
        Mod_FreeSkinFiles(skinfiles);
 
-       // set the surface textures
-       for (textureindex = 0;textureindex < numtextures;textureindex++)
-       {
-               msurface_t *surface = loadmodel->data_surfaces + textureindex;
-               surface->texture = loadmodel->data_textures + textureindex;
-       }
+       // set the surface textures to their real values now that we loaded them...
+       for (i = 0;i < loadmodel->num_surfaces;i++)
+               loadmodel->data_surfaces[i].texture = loadmodel->data_textures + (size_t)loadmodel->data_surfaces[i].texture;
 
        // free data
        Mem_Free(vertices);
@@ -7470,987 +7934,151 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        Mem_Free(vertexhashtable);
        Mem_Free(vertexhashdata);
 
+       // make a single combined shadow mesh to allow optimized shadow volume creation
+       Mod_Q1BSP_CreateShadowMesh(loadmodel);
+
        // compute all the mesh information that was not loaded from the file
-       Mod_MakeSortedSurfaces(loadmodel);
        if (loadmodel->surfmesh.data_element3s)
                for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
                        loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
        Mod_ValidateElements(loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles, 0, loadmodel->surfmesh.num_vertices, __FILE__, __LINE__);
        // generate normals if the file did not have them
        if (!VectorLength2(loadmodel->surfmesh.data_normal3f))
-               Mod_BuildNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_normal3f, true);
-       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, true);
-       Mod_BuildTriangleNeighbors(loadmodel->surfmesh.data_neighbor3i, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles);
-
-       Mod_MakeCollisionBIH(loadmodel, true);
-}
-
-
-
+               Mod_BuildNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
+       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
+       if (loadmodel->surfmesh.data_neighbor3i)
+               Mod_BuildTriangleNeighbors(loadmodel->surfmesh.data_neighbor3i, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles);
+
+       // if this is a worldmodel and has no BSP tree, create a fake one for the purpose
+       loadmodel->brush.num_visleafs = 1;
+       loadmodel->brush.num_leafs = 1;
+       loadmodel->brush.num_nodes = 0;
+       loadmodel->brush.num_leafsurfaces = loadmodel->num_surfaces;
+       loadmodel->brush.data_leafs = (mleaf_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafs * sizeof(mleaf_t));
+       loadmodel->brush.data_nodes = (mnode_t *)loadmodel->brush.data_leafs;
+       loadmodel->brush.num_pvsclusters = 1;
+       loadmodel->brush.num_pvsclusterbytes = 1;
+       loadmodel->brush.data_pvsclusters = nobsp_pvs;
+       //if (loadmodel->num_nodes) loadmodel->data_nodes = (mnode_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_nodes * sizeof(mnode_t));
+       //loadmodel->data_leafsurfaces = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->num_leafsurfaces * sizeof(int));
+       loadmodel->brush.data_leafsurfaces = loadmodel->sortedmodelsurfaces;
+       VectorCopy(loadmodel->normalmins, loadmodel->brush.data_leafs->mins);
+       VectorCopy(loadmodel->normalmaxs, loadmodel->brush.data_leafs->maxs);
+       loadmodel->brush.data_leafs->combinedsupercontents = 0; // FIXME?
+       loadmodel->brush.data_leafs->clusterindex = 0;
+       loadmodel->brush.data_leafs->areaindex = 0;
+       loadmodel->brush.data_leafs->numleafsurfaces = loadmodel->brush.num_leafsurfaces;
+       loadmodel->brush.data_leafs->firstleafsurface = loadmodel->brush.data_leafsurfaces;
+       loadmodel->brush.data_leafs->numleafbrushes = 0;
+       loadmodel->brush.data_leafs->firstleafbrush = NULL;
+       loadmodel->brush.supportwateralpha = true;
 
+       if (loadmodel->brush.numsubmodels)
+               loadmodel->brush.submodels = (dp_model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
 
+       mod = loadmodel;
+       for (i = 0;i < loadmodel->brush.numsubmodels;i++)
+       {
+               if (i > 0)
+               {
+                       char name[10];
+                       // duplicate the basic information
+                       dpsnprintf(name, sizeof(name), "*%i", i);
+                       mod = Mod_FindName(name, loadmodel->name);
+                       // copy the base model to this one
+                       *mod = *loadmodel;
+                       // rename the clone back to its proper name
+                       strlcpy(mod->name, name, sizeof(mod->name));
+                       mod->brush.parentmodel = loadmodel;
+                       // textures and memory belong to the main model
+                       mod->texturepool = NULL;
+                       mod->mempool = NULL;
+                       mod->brush.GetPVS = NULL;
+                       mod->brush.FatPVS = NULL;
+                       mod->brush.BoxTouchingPVS = NULL;
+                       mod->brush.BoxTouchingLeafPVS = NULL;
+                       mod->brush.BoxTouchingVisibleLeafs = NULL;
+                       mod->brush.FindBoxClusters = NULL;
+                       mod->brush.LightPoint = NULL;
+                       mod->brush.AmbientSoundLevelsForPoint = NULL;
+               }
+               mod->brush.submodel = i;
+               if (loadmodel->brush.submodels)
+                       loadmodel->brush.submodels[i] = mod;
 
+               // make the model surface list (used by shadowing/lighting)
+               mod->firstmodelsurface = submodelfirstsurface[i];
+               mod->nummodelsurfaces = submodelfirstsurface[i+1] - submodelfirstsurface[i];
+               mod->firstmodelbrush = 0;
+               mod->nummodelbrushes = 0;
+               mod->sortedmodelsurfaces = loadmodel->sortedmodelsurfaces + mod->firstmodelsurface;
+               Mod_MakeSortedSurfaces(mod);
 
-
-
-
-#else // OBJASMODEL
-
-#ifdef OBJWORKS
-typedef struct objvertex_s
-{
-       float v[3];
-       float vt[2];
-       float vn[3];
-}
-objvertex_t;
-
-typedef struct objtriangle_s
-{
-       objvertex_t vertex[3];
-       int textureindex;
-       // these fields are used only in conversion to surfaces
-       int axis;
-       int surfaceindex;
-       int surfacevertexindex[3];
-       float edgeplane[3][4];
-}
-objtriangle_t;
-
-typedef objnode_s
-{
-       struct objnode_s *children[2];
-       struct objnode_s *parent;
-       objtriangle_t *triangles;
-       float normal[3];
-       float dist;
-       float mins[3];
-       float maxs[3];
-       int numtriangles;
-}
-objnode_t;
-
-objnode_t *Mod_OBJ_BSPNodeForTriangles(objnode_t *parent, objtriangle_t *triangles, int numtriangles, const float *mins, const float *maxs, mem_expandablearray_t *nodesarray, int maxclippedtriangles, objtriangle_t *clippedfronttriangles, objtriangle_t *clippedbacktriangles)
-{
-       int i, j;
-       float normal[3];
-       float dist;
-       int score;
-       float bestnormal[3];
-       float bestdist;
-       int bestscore;
-       float mins[3];
-       float maxs[3];
-       int numfronttriangles;
-       int numbacktriangles;
-       int count_front;
-       int count_back;
-       int count_both;
-       int count_on;
-       float outfrontpoints[5][3];
-       float outbackpoints[5][3];
-       int neededfrontpoints;
-       int neededbackpoints;
-       int countonpoints;
-       objnode_t *node;
-
-       node = (objnode_t *)Mem_ExpandableArray_AllocRecord(array);
-       node->parent = parent;
-       if (numtriangles)
-       {
-               VectorCopy(triangles[0].vertex[0].v, mins);
-               VectorCopy(triangles[0].vertex[0].v, maxs);
-       }
-       else if (parent && parent->children[0] == node)
-       {
-               VectorCopy(parent->mins, mins);
-               Vectorcopy(parent->maxs, maxs);
-       }
-       else if (parent && parent->children[1] == node)
-       {
-               VectorCopy(parent->mins, mins);
-               Vectorcopy(parent->maxs, maxs);
-       }
-       else
-       {
-               VectorClear(mins);
-               VectorClear(maxs);
-       }
-       for (i = 0;i < numtriangles;i++)
-       {
-               for (j = 0;j < 3;j++)
-               {
-                       mins[0] = min(mins[0], triangles[i].vertex[j].v[0]);
-                       mins[1] = min(mins[1], triangles[i].vertex[j].v[1]);
-                       mins[2] = min(mins[2], triangles[i].vertex[j].v[2]);
-                       maxs[0] = max(maxs[0], triangles[i].vertex[j].v[0]);
-                       maxs[1] = max(maxs[1], triangles[i].vertex[j].v[1]);
-                       maxs[2] = max(maxs[2], triangles[i].vertex[j].v[2]);
-               }
-       }
-       VectorCopy(mins, node->mins);
-       VectorCopy(maxs, node->maxs);
-       if (numtriangles <= mod_obj_leaftriangles.integer)
-       {
-               // create a leaf
-               loadmodel->brush.num_leafs++;
-               node->triangles = triangles;
-               node->numtriangles = numtriangles;
-               return node;
-       }
-
-       // create a node
-       loadmodel->brush.num_nodes++;
-       // pick a splitting plane from the various choices available to us...
-       // early splits simply halve the interval
-       bestscore = 0;
-       VectorClear(bestnormal);
-       bestdist = 0;
-       if (numtriangles <= mod_obj_splitterlimit.integer)
-               limit = numtriangles;
-       else
-               limit = 0;
-       for (i = -3;i < limit;i++)
-       {
-               if (i < 0)
-               {
-                       // first we try 3 axial splits (kdtree-like)
-                       j = i + 3;
-                       VectorClear(normal);
-                       normal[j] = 1;
-                       dist = (mins[j] + maxs[j]) * 0.5f;
-               }
-               else
+               VectorClear(mod->normalmins);
+               VectorClear(mod->normalmaxs);
+               l = false;
+               for (j = 0;j < mod->nummodelsurfaces;j++)
                {
-                       // then we try each triangle plane
-                       TriangleNormal(triangles[i].vertex[0].v, triangles[i].vertex[1].v, triangles[i].vertex[2].v, normal);
-                       VectorNormalize(normal);
-                       dist = DotProduct(normal, triangles[i].vertex[0].v);
-                       // use positive axial values whenever possible
-                       if (normal[0] == -1)
-                               normal[0] = 1;
-                       if (normal[1] == -1)
-                               normal[1] = 1;
-                       if (normal[2] == -1)
-                               normal[2] = 1;
-                       // skip planes that match the current best
-                       if (VectorCompare(normal, bestnormal) && dist == bestdist)
+                       const msurface_t *surface = mod->data_surfaces + j + mod->firstmodelsurface;
+                       const float *v = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
+                       int k;
+                       if (!surface->num_vertices)
                                continue;
-               }
-               count_on = 0;
-               count_front = 0;
-               count_back = 0;
-               count_both = 0;
-               for (j = 0;j < numtriangles;j++)
-               {
-                       dists[0] = DotProduct(normal, triangles[j].vertex[0].v) - dist;
-                       dists[1] = DotProduct(normal, triangles[j].vertex[1].v) - dist;
-                       dists[2] = DotProduct(normal, triangles[j].vertex[2].v) - dist;
-                       if (dists[0] < -DIST_EPSILON || dists[1] < -DIST_EPSILON || dists[2] < -DIST_EPSILON)
+                       if (!l)
                        {
-                               if (dists[0] > DIST_EPSILON || dists[1] > DIST_EPSILON || dists[2] > DIST_EPSILON)
-                                       count_both++;
-                               else
-                                       count_back++;
-                       }
-                       else if (dists[0] > DIST_EPSILON || dists[1] > DIST_EPSILON || dists[2] > DIST_EPSILON)
-                               count_front++;
-                       else
-                               count_on++;
-               }
-               // score is supposed to:
-               // prefer axial splits
-               // prefer evenly dividing the input triangles
-               // prefer triangles on the plane
-               // avoid triangles crossing the plane
-               score = count_on*count_on - count_both*count_both + min(count_front, count_back)*(count_front+count_back);
-               if (normal[0] == 1 || normal[1] == 1 || normal[2] == 1)
-                       score *= 2;
-               if (i == -3 || bestscore < score)
-               {
-                       VectorCopy(normal, bestnormal);
-                       bestdist = dist;
-                       bestscore = score;
-               }
-       }
-
-       // now we have chosen an optimal split plane...
-
-       // divide triangles by the splitting plane
-       numfronttriangles = 0;
-       numbacktriangles = 0;
-       for (i = 0;i < numtriangles;i++)
-       {
-               neededfrontpoints = 0;
-               neededbackpoints = 0;
-               countonpoints = 0;
-               PolygonF_Divide(3, triangles[i].vertex[0].v, bestnormal[0], bestnormal[1], bestnormal[2], bestdist, DIST_EPSILON, 5, outfrontpoints[0], &neededfrontpoints, 5, outbackpoints[0], &neededbackpoints, &countonpoints);
-               if (countonpoints > 1)
-               {
-                       // triangle lies on plane, assign it to one child only
-                       TriangleNormal(triangles[i].vertex[0].v, triangles[i].vertex[1].v, triangles[i].vertex[2].v, normal);
-                       if (DotProduct(bestnormal, normal) >= 0)
-                       {
-                               // assign to front side child
-                               obj_fronttriangles[numfronttriangles++] = triangles[i];
+                               l = true;
+                               VectorCopy(v, mod->normalmins);
+                               VectorCopy(v, mod->normalmaxs);
                        }
-                       else
-                       {
-                               // assign to back side child
-                               obj_backtriangles[numbacktriangles++] = triangles[i];
-                       }
-               }
-               else
-               {
-                       // convert clipped polygons to triangles
-                       for (j = 0;j < neededfrontpoints-2;j++)
-                       {
-                               obj_fronttriangles[numfronttriangles] = triangles[i];
-                               VectorCopy(outfrontpoints[0], obj_fronttriangles[numfronttriangles].vertex[0].v);
-                               VectorCopy(outfrontpoints[j+1], obj_fronttriangles[numfronttriangles].vertex[1].v);
-                               VectorCopy(outfrontpoints[j+2], obj_fronttriangles[numfronttriangles].vertex[2].v);
-                               numfronttriangles++;
-                       }
-                       for (j = 0;j < neededbackpoints-2;j++)
-                       {
-                               obj_backtriangles[numbacktriangles] = triangles[i];
-                               VectorCopy(outbackpoints[0], obj_backtriangles[numbacktriangles].vertex[0].v);
-                               VectorCopy(outbackpoints[j+1], obj_backtriangles[numbacktriangles].vertex[1].v);
-                               VectorCopy(outbackpoints[j+2], obj_backtriangles[numbacktriangles].vertex[2].v);
-                               numbacktriangles++;
-                       }
-               }
-       }
-
-       // now copy the triangles out of the big buffer
-       if (numfronttriangles)
-       {
-               fronttriangles = Mem_Alloc(loadmodel->mempool, fronttriangles * sizeof(*fronttriangles));
-               memcpy(fronttriangles, obj_fronttriangles, numfronttriangles * sizeof(*fronttriangles));
-       }
-       else
-               fronttriangles = NULL;
-       if (numbacktriangles)
-       {
-               backtriangles = Mem_Alloc(loadmodel->mempool, backtriangles * sizeof(*backtriangles));
-               memcpy(backtriangles, obj_backtriangles, numbacktriangles * sizeof(*backtriangles));
-       }
-       else
-               backtriangles = NULL;
-
-       // free the original triangles we were given
-       if (triangles)
-               Mem_Free(triangles);
-       triangles = NULL;
-       numtriangles = 0;
-
-       // now create the children...
-       node->children[0] = Mod_OBJ_BSPNodeForTriangles(node, fronttriangles, numfronttriangles, frontmins, frontmaxs, nodesarray, maxclippedtriangles, clippedfronttriangles, clippedbacktriangles);
-       node->children[1] = Mod_OBJ_BSPNodeForTriangles(node, backtriangles, numbacktriangles, backmins, backmaxs, nodesarray, maxclippedtriangles, clippedfronttriangles, clippedbacktriangles);
-       return node;
-}
-
-void Mod_OBJ_SnapVertex(float *v)
-{
-       int i;
-       float a = mod_obj_vertexprecision.value;
-       float b = 1.0f / a;
-       v[0] -= floor(v[0] * a + 0.5f) * b;
-       v[1] -= floor(v[1] * a + 0.5f) * b;
-       v[2] -= floor(v[2] * a + 0.5f) * b;
-}
-
-void Mod_OBJ_ConvertBSPNode(objnode_t *objnode, mnode_t *mnodeparent)
-{
-       if (objnode->children[0])
-       {
-               // convert to mnode_t
-               mnode_t *mnode = loadmodel->brush.data_nodes + loadmodel->brush.num_nodes++;
-               mnode->parent = mnodeparent;
-               mnode->plane = loadmodel->brush.data_planes + loadmodel->brush.num_planes++;
-               VectorCopy(objnode->normal, mnode->plane->normal);
-               mnode->plane->dist = objnode->dist;
-               PlaneClassify(mnode->plane);
-               VectorCopy(objnode->mins, mnode->mins);
-               VectorCopy(objnode->maxs, mnode->maxs);
-               // push combinedsupercontents up to the parent
-               if (mnodeparent)
-                       mnodeparent->combinedsupercontents |= mnode->combinedsupercontents;
-               mnode->children[0] = Mod_OBJ_ConvertBSPNode(objnode->children[0], mnode);
-               mnode->children[1] = Mod_OBJ_ConvertBSPNode(objnode->children[1], mnode);
-       }
-       else
-       {
-               // convert to mleaf_t
-               mleaf_t *mleaf = loadmodel->brush.data_leafs + loadmodel->brush.num_leafs++;
-               mleaf->parent = mnodeparent;
-               VectorCopy(objnode->mins, mleaf->mins);
-               VectorCopy(objnode->maxs, mleaf->maxs);
-               mleaf->clusterindex = loadmodel->brush.num_leafs - 1;
-               if (objnode->numtriangles)
-               {
-                       objtriangle_t *triangles = objnode->triangles;
-                       int numtriangles = objnode->numtriangles;
-                       texture_t *texture;
-                       float edge[3][3];
-                       float normal[3];
-                       objvertex_t vertex[3];
-                       numsurfaces = 0;
-                       maxsurfaces = numtriangles;
-                       surfaces = NULL;
-                       // calculate some more data on each triangle for surface gathering
-                       for (i = 0;i < numtriangles;i++)
-                       {
-                               triangle = triangles + i;
-                               texture = loadmodel->data_textures + triangle->textureindex;
-                               Mod_OBJ_SnapVertex(triangle->vertex[0].v);
-                               Mod_OBJ_SnapVertex(triangle->vertex[1].v);
-                               Mod_OBJ_SnapVertex(triangle->vertex[2].v);
-                               TriangleNormal(triangle->vertex[0].v, triangle->vertex[1].v, triangle->vertex[2].v, normal);
-                               axis = 0;
-                               if (fabs(normal[axis]) < fabs(normal[1]))
-                                       axis = 1;
-                               if (fabs(normal[axis]) < fabs(normal[2]))
-                                       axis = 2;
-                               VectorClear(normal);
-                               normal[axis] = 1;
-                               triangle->axis = axis;
-                               VectorSubtract(triangle->vertex[1].v, triangle->vertex[0].v, edge[0]);
-                               VectorSubtract(triangle->vertex[2].v, triangle->vertex[1].v, edge[1]);
-                               VectorSubtract(triangle->vertex[0].v, triangle->vertex[2].v, edge[2]);
-                               CrossProduct(edge[0], normal, triangle->edgeplane[0]);
-                               CrossProduct(edge[1], normal, triangle->edgeplane[1]);
-                               CrossProduct(edge[2], normal, triangle->edgeplane[2]);
-                               VectorNormalize(triangle->edgeplane[0]);
-                               VectorNormalize(triangle->edgeplane[1]);
-                               VectorNormalize(triangle->edgeplane[2]);
-                               triangle->edgeplane[0][3] = DotProduct(triangle->edgeplane[0], triangle->vertex[0].v);
-                               triangle->edgeplane[1][3] = DotProduct(triangle->edgeplane[1], triangle->vertex[1].v);
-                               triangle->edgeplane[2][3] = DotProduct(triangle->edgeplane[2], triangle->vertex[2].v);
-                               triangle->surfaceindex = 0;
-                               // add to the combined supercontents while we're here...
-                               mleaf->combinedsupercontents |= texture->supercontents;
-                       }
-                       surfaceindex = 1;
-                       for (i = 0;i < numtriangles;i++)
+                       for (k = 0;k < surface->num_vertices;k++, v += 3)
                        {
-                               // skip already-assigned triangles
-                               if (triangles[i].surfaceindex)
-                                       continue;
-                               texture = loadmodel->data_textures + triangles[i].textureindex;
-                               // assign a new surface to this triangle
-                               triangles[i].surfaceindex = surfaceindex++;
-                               axis = triangles[i].axis;
-                               numvertices = 3;
-                               // find the triangle's neighbors, this can take multiple passes
-                               retry = true;
-                               while (retry)
-                               {
-                                       retry = false;
-                                       for (j = i+1;j < numtriangles;j++)
-                                       {
-                                               if (triangles[j].surfaceindex || triangles[j].axis != axis || triangles[j].texture != texture)
-                                                       continue;
-                                               triangle = triangles + j;
-                                               for (k = i;k < j;k++)
-                                               {
-                                                       if (triangles[k].surfaceindex != surfaceindex)
-                                                               continue;
-                                                       if (VectorCompare(triangles[k].vertex[0].v, triangles[j].vertex[0].v)
-                                                        || VectorCompare(triangles[k].vertex[0].v, triangles[j].vertex[1].v)
-                                                        || VectorCompare(triangles[k].vertex[0].v, triangles[j].vertex[2].v)
-                                                        || VectorCompare(triangles[k].vertex[1].v, triangles[j].vertex[0].v)
-                                                        || VectorCompare(triangles[k].vertex[1].v, triangles[j].vertex[1].v)
-                                                        || VectorCompare(triangles[k].vertex[1].v, triangles[j].vertex[2].v)
-                                                        || VectorCompare(triangles[k].vertex[2].v, triangles[j].vertex[0].v)
-                                                        || VectorCompare(triangles[k].vertex[2].v, triangles[j].vertex[1].v)
-                                                        || VectorCompare(triangles[k].vertex[2].v, triangles[j].vertex[2].v))
-                                                       {
-                                                               // shares a vertex position
-                                                               --- FIXME ---
-                                                       }
-                                               }
-                                               for (k = 0;k < numvertices;k++)
-                                                       if (!VectorCompare(vertex[k].v, triangles[j].vertex[0].v) || !VectorCompare(vertex[k].v, triangles[j].vertex[1].v) || !VectorCompare(vertex[k].v, triangles[j].vertex[2].v))
-                                                               break;
-                                               if (k == numvertices)
-                                                       break; // not a neighbor
-                                               // this triangle is a neighbor and has the same axis and texture
-                                               // check now if it overlaps in lightmap projection space
-                                               triangles[j].surfaceindex;
-                                               if (triangles[j].
-                                       }
-                               }
-                               //triangles[i].surfaceindex = surfaceindex++;
-                               for (surfaceindex = 0;surfaceindex < numsurfaces;surfaceindex++)
-                               {
-                                       if (surfaces[surfaceindex].texture != texture)
-                                               continue;
-                                       // check if any triangles already in this surface overlap in lightmap projection space
-                                       
-                                       {
-                                       }
-                                       break;
-                               }
+                               mod->normalmins[0] = min(mod->normalmins[0], v[0]);
+                               mod->normalmins[1] = min(mod->normalmins[1], v[1]);
+                               mod->normalmins[2] = min(mod->normalmins[2], v[2]);
+                               mod->normalmaxs[0] = max(mod->normalmaxs[0], v[0]);
+                               mod->normalmaxs[1] = max(mod->normalmaxs[1], v[1]);
+                               mod->normalmaxs[2] = max(mod->normalmaxs[2], v[2]);
                        }
-                       // let the collision code simply use the surfaces
-                       mleaf->containscollisionsurfaces = mleaf->combinedsupercontents != 0;
-                       mleaf->numleafsurfaces = ?;
-                       mleaf->firstleafsurface = ?;
                }
-               // push combinedsupercontents up to the parent
-               if (mnodeparent)
-                       mnodeparent->combinedsupercontents |= mleaf->combinedsupercontents;
-       }
-}
-#endif
-
-void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
-{
-#ifdef OBJWORKS
-       const char *textbase = (char *)buffer, *text = textbase;
-       char *s;
-       char *argv[512];
-       char line[1024];
-       char materialname[MAX_QPATH];
-       int j, index1, index2, index3, first, prev, index;
-       int argc;
-       int linelen;
-       int numtriangles = 0;
-       int maxtriangles = 131072;
-       objtriangle_t *triangles = Mem_Alloc(tempmempool, maxtriangles * sizeof(*triangles));
-       int linenumber = 0;
-       int maxtextures = 256, numtextures = 0, textureindex = 0;
-       int maxv = 1024, numv = 0;
-       int maxvt = 1024, numvt = 0;
-       int maxvn = 1024, numvn = 0;
-       char **texturenames;
-       float *v = Mem_Alloc(tempmempool, maxv * sizeof(float[3]));
-       float *vt = Mem_Alloc(tempmempool, maxvt * sizeof(float[2]));
-       float *vn = Mem_Alloc(tempmempool, maxvn * sizeof(float[3]));
-       objvertex_t vfirst, vprev, vcurrent;
-       float mins[3];
-       float maxs[3];
-#if 0
-       int hashindex;
-       int maxverthash = 65536, numverthash = 0;
-       int numhashindex = 65536;
-       struct objverthash_s
-       {
-               struct objverthash_s *next;
-               int s;
-               int v;
-               int vt;
-               int vn;
-       }
-       *hash, **verthash = Mem_Alloc(tempmempool, numhashindex * sizeof(*verthash)), *verthashdata = Mem_Alloc(tempmempool, maxverthash * sizeof(*verthashdata)), *oldverthashdata;
-#endif
-
-       dpsnprintf(materialname, sizeof(materialname), "%s", loadmodel->name);
-
-       loadmodel->modeldatatypestring = "OBJ";
-
-       loadmodel->type = mod_obj;
-       loadmodel->soundfromcenter = true;
-       loadmodel->TraceBox = Mod_OBJ_TraceBox;
-       loadmodel->TraceLine = Mod_OBJ_TraceLine;
-       loadmodel->TracePoint = Mod_OBJ_TracePoint;
-       loadmodel->PointSuperContents = Mod_OBJ_PointSuperContents;
-       loadmodel->brush.TraceLineOfSight = Mod_OBJ_TraceLineOfSight;
-       loadmodel->brush.SuperContentsFromNativeContents = Mod_OBJ_SuperContentsFromNativeContents;
-       loadmodel->brush.NativeContentsFromSuperContents = Mod_OBJ_NativeContentsFromSuperContents;
-       loadmodel->brush.GetPVS = Mod_OBJ_GetPVS;
-       loadmodel->brush.FatPVS = Mod_OBJ_FatPVS;
-       loadmodel->brush.BoxTouchingPVS = Mod_OBJ_BoxTouchingPVS;
-       loadmodel->brush.BoxTouchingLeafPVS = Mod_OBJ_BoxTouchingLeafPVS;
-       loadmodel->brush.BoxTouchingVisibleLeafs = Mod_OBJ_BoxTouchingVisibleLeafs;
-       loadmodel->brush.FindBoxClusters = Mod_OBJ_FindBoxClusters;
-       loadmodel->brush.LightPoint = Mod_OBJ_LightPoint;
-       loadmodel->brush.FindNonSolidLocation = Mod_OBJ_FindNonSolidLocation;
-       loadmodel->brush.AmbientSoundLevelsForPoint = NULL;
-       loadmodel->brush.RoundUpToHullSize = NULL;
-       loadmodel->brush.PointInLeaf = Mod_OBJ_PointInLeaf;
-       loadmodel->Draw = R_Q1BSP_Draw;
-       loadmodel->DrawDepth = R_Q1BSP_DrawDepth;
-       loadmodel->DrawDebug = R_Q1BSP_DrawDebug;
-       loadmodel->DrawPrepass = R_Q1BSP_DrawPrepass;
-       loadmodel->GetLightInfo = R_Q1BSP_GetLightInfo;
-       loadmodel->CompileShadowMap = R_Q1BSP_CompileShadowMap;
-       loadmodel->DrawShadowMap = R_Q1BSP_DrawShadowMap;
-       loadmodel->CompileShadowVolume = R_Q1BSP_CompileShadowVolume;
-       loadmodel->DrawShadowVolume = R_Q1BSP_DrawShadowVolume;
-       loadmodel->DrawLight = R_Q1BSP_DrawLight;
+               corner[0] = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
+               corner[1] = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
+               corner[2] = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
+               modelradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]+corner[2]*corner[2]);
+               yawradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]);
+               mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
+               mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] = modelradius;
+               mod->yawmaxs[0] = mod->yawmaxs[1] = yawradius;
+               mod->yawmins[0] = mod->yawmins[1] = -yawradius;
+               mod->yawmins[2] = mod->normalmins[2];
+               mod->yawmaxs[2] = mod->normalmaxs[2];
+               mod->radius = modelradius;
+               mod->radius2 = modelradius * modelradius;
 
-       VectorClear(mins);
-       VectorClear(maxs);
+               // this gets altered below if sky or water is used
+               mod->DrawSky = NULL;
+               mod->DrawAddWaterPlanes = NULL;
 
-       // parse the OBJ text now
-       for(;;)
-       {
-               if (!*text)
-                       break;
-               linenumber++;
-               linelen = 0;
-               for (linelen = 0;text[linelen] && text[linelen] != '\r' && text[linelen] != '\n';linelen++)
-                       line[linelen] = text[linelen];
-               line[linelen] = 0;
-               for (argc = 0;argc < (int)(sizeof(argv)/sizeof(argv[0]));argc++)
-                       argv[argc] = "";
-               argc = 0;
-               s = line;
-               while (*s == ' ' || *s == '\t')
-                       s++;
-               while (*s)
-               {
-                       argv[argc++] = s;
-                       while (*s > ' ')
-                               s++;
-                       if (!*s)
+               for (j = 0;j < mod->nummodelsurfaces;j++)
+                       if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & MATERIALFLAG_SKY)
                                break;
-                       *s++ = 0;
-                       while (*s == ' ' || *s == '\t')
-                               s++;
-               }
-               if (!argc)
-                       continue;
-               if (argv[0][0] == '#')
-                       continue;
-               if (!strcmp(argv[0], "v"))
-               {
-                       if (maxv <= numv)
-                       {
-                               float *oldv = v;
-                               maxv *= 2;
-                               v = Mem_Alloc(tempmempool, maxv * sizeof(float[3]));
-                               if (oldv)
-                               {
-                                       memcpy(v, oldv, numv * sizeof(float[3]));
-                                       Mem_Free(oldv);
-                               }
-                       }
-                       v[numv*3+0] = atof(argv[1]);
-                       v[numv*3+1] = atof(argv[2]);
-                       v[numv*3+2] = atof(argv[3]);
-                       numv++;
-               }
-               else if (!strcmp(argv[0], "vt"))
-               {
-                       if (maxvt <= numvt)
-                       {
-                               float *oldvt = vt;
-                               maxvt *= 2;
-                               vt = Mem_Alloc(tempmempool, maxvt * sizeof(float[2]));
-                               if (oldvt)
-                               {
-                                       memcpy(vt, oldvt, numvt * sizeof(float[2]));
-                                       Mem_Free(oldvt);
-                               }
-                       }
-                       vt[numvt*2+0] = atof(argv[1]);
-                       vt[numvt*2+1] = atof(argv[2]);
-                       numvt++;
-               }
-               else if (!strcmp(argv[0], "vn"))
-               {
-                       if (maxvn <= numvn)
-                       {
-                               float *oldvn = vn;
-                               maxvn *= 2;
-                               vn = Mem_Alloc(tempmempool, maxvn * sizeof(float[3]));
-                               if (oldvn)
-                               {
-                                       memcpy(vn, oldvn, numvn * sizeof(float[3]));
-                                       Mem_Free(oldvn);
-                               }
-                       }
-                       vn[numvn*3+0] = atof(argv[1]);
-                       vn[numvn*3+1] = atof(argv[2]);
-                       vn[numvn*3+2] = atof(argv[3]);
-                       numvn++;
-               }
-               else if (!strcmp(argv[0], "f"))
-               {
-                       for (j = 1;j < argc;j++)
-                       {
-                               index1 = atoi(argv[j]);
-                               while(argv[j][0] && argv[j][0] != '/')
-                                       argv[j]++;
-                               if (argv[j][0])
-                                       argv[j]++;
-                               index2 = atoi(argv[j]);
-                               while(argv[j][0] && argv[j][0] != '/')
-                                       argv[j]++;
-                               if (argv[j][0])
-                                       argv[j]++;
-                               index3 = atoi(argv[j]);
-                               // negative refers to a recent vertex
-                               // zero means not specified
-                               // positive means an absolute vertex index
-                               if (index1 < 0)
-                                       index1 = numv - index1;
-                               if (index2 < 0)
-                                       index2 = numvt - index2;
-                               if (index3 < 0)
-                                       index3 = numvn - index3;
-                               VectorCopy(v + 3*index1, vcurrent.v);
-                               Vector2Copy(vt + 2*index2, vcurrent.vt);
-                               VectorCopy(vn + 3*index3, vcurrent.vn);
-                               if (numtriangles == 0)
-                               {
-                                       VectorCopy(vcurrent.v, mins);
-                                       VectorCopy(vcurrent.v, maxs);
-                               }
-                               else
-                               {
-                                       mins[0] = min(mins[0], vcurrent.v[0]);
-                                       mins[1] = min(mins[1], vcurrent.v[1]);
-                                       mins[2] = min(mins[2], vcurrent.v[2]);
-                                       maxs[0] = max(maxs[0], vcurrent.v[0]);
-                                       maxs[1] = max(maxs[1], vcurrent.v[1]);
-                                       maxs[2] = max(maxs[2], vcurrent.v[2]);
-                               }
-                               if (j == 1)
-                                       vfirst = vcurrent;
-                               else if (j >= 3)
-                               {
-                                       if (maxtriangles <= numtriangles)
-                                       {
-                                               objtriangle_t *oldtriangles = triangles;
-                                               maxtriangles *= 2;
-                                               triangles = Mem_Alloc(tempmempool, maxtriangles * sizeof(*triangles));
-                                               if (oldtriangles)
-                                               {
-                                                       memcpy(triangles, oldtriangles, maxtriangles * sizeof(*triangles));
-                                                       Mem_Free(oldtriangles);
-                                               }
-                                       }
-                                       triangles[numtriangles].textureindex = textureindex;
-                                       triangles[numtriangles].vertex[0] = vfirst;
-                                       triangles[numtriangles].vertex[1] = vprev;
-                                       triangles[numtriangles].vertex[2] = vcurrent;
-                                       numtriangles++;
-                               }
-                               vprev = vcurrent;
-                               prev = index;
-                       }
-               }
-               else if (!strcmp(argv[0], "o") || !strcmp(argv[0], "g"))
-                       ;
-               else if (!!strcmp(argv[0], "usemtl"))
-               {
-                       for (i = 0;i < numtextures;i++)
-                               if (!strcmp(texturenames[numtextures], argv[1]))
-                                       break;
-                       if (i < numtextures)
-                               texture = textures + i;
-                       else
-                       {
-                               if (maxtextures <= numtextures)
-                               {
-                                       texture_t *oldtextures = textures;
-                                       maxtextures *= 2;
-                                       textures = Mem_Alloc(tempmempool, maxtextures * sizeof(*textures));
-                                       if (oldtextures)
-                                       {
-                                               memcpy(textures, oldtextures, numtextures * sizeof(*textures));
-                                               Mem_Free(oldtextures);
-                                       }
-                               }
-                               textureindex = numtextures++;
-                               texturenames[textureindex] = Mem_Alloc(tempmempool, strlen(argv[1]) + 1);
-                               memcpy(texturenames[textureindex], argv[1], strlen(argv[1]) + 1);
-                       }
-               }
-               text += linelen;
-               if (*text == '\r')
-                       text++;
-               if (*text == '\n')
-                       text++;
-       }
-
-       // now that we have the OBJ data loaded as-is, we can convert it
-
-       // load the textures
-       loadmodel->num_textures = numtextures;
-       loadmodel->data_textures = Mem_Alloc(loadmodel->mempool, loadmodel->num_textures * sizeof(texture_t));
-       for (i = 0;i < numtextures;i++)
-               Mod_LoadTextureFromQ3Shader(loadmodel->data_textures + i, texturenames[i], true, true, TEXF_MIPMAP | TEXF_ALPHA | (r_picmipworld.integer ? TEXF_PICMIP : 0) | TEXF_COMPRESS);
-
-       // free the texturenames array since we are now done with it
-       for (i = 0;i < numtextures;i++)
-       {
-               Mem_Free(texturenames[i]);
-               texturenames[i] = NULL;
-       }
-       Mem_Free(texturenames);
-       texturenames = NULL;
-
-       // copy the model bounds, then enlarge the yaw and rotated bounds according to radius
-       VectorCopy(mins, loadmodel->normalmins);
-       VectorCopy(maxs, loadmodel->normalmaxs);
-       dist = max(fabs(loadmodel->normalmins[0]), fabs(loadmodel->normalmaxs[0]));
-       modelyawradius = max(fabs(loadmodel->normalmins[1]), fabs(loadmodel->normalmaxs[1]));
-       modelyawradius = dist*dist+modelyawradius*modelyawradius;
-       modelradius = max(fabs(loadmodel->normalmins[2]), fabs(loadmodel->normalmaxs[2]));
-       modelradius = modelyawradius + modelradius * modelradius;
-       modelyawradius = sqrt(modelyawradius);
-       modelradius = sqrt(modelradius);
-       loadmodel->yawmins[0] = loadmodel->yawmins[1] = -modelyawradius;
-       loadmodel->yawmins[2] = loadmodel->normalmins[2];
-       loadmodel->yawmaxs[0] = loadmodel->yawmaxs[1] =  modelyawradius;
-       loadmodel->yawmaxs[2] = loadmodel->normalmaxs[2];
-       loadmodel->rotatedmins[0] = loadmodel->rotatedmins[1] = loadmodel->rotatedmins[2] = -modelradius;
-       loadmodel->rotatedmaxs[0] = loadmodel->rotatedmaxs[1] = loadmodel->rotatedmaxs[2] =  modelradius;
-       loadmodel->radius = modelradius;
-       loadmodel->radius2 = modelradius * modelradius;
-
-       // make sure the temp triangle buffer is big enough for BSP building
-       maxclippedtriangles = numtriangles*4;
-       if (numtriangles > 0)
-       {
-               clippedfronttriangles = Mem_Alloc(loadmodel->mempool, maxclippedtriangles * 2 * sizeof(objtriangle_t));
-               clippedbacktriangles = clippedfronttriangles + maxclippedtriangles;
-       }
-
-       // generate a rough BSP tree from triangle data, we don't have to be too careful here, it only has to define the basic areas of the map
-       loadmodel->brush.num_leafs = 0;
-       loadmodel->brush.num_nodes = 0;
-       Mem_ExpandableArray_NewArray(&nodesarray, loadmodel->mempool, sizeof(objnode_t), 1024);
-       rootnode = Mod_OBJ_BSPNodeForTriangles(triangles, numtriangles, mins, maxs, &nodesarray, maxclippedtriangles, clippedfronttriangles, clippedbacktriangles);
-
-       // convert the BSP tree to mnode_t and mleaf_t structures and convert the triangles to msurface_t...
-       loadmodel->brush.data_leafs = Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafs * sizeof(mleaf_t));
-       loadmodel->brush.data_nodes = Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_nodes * sizeof(mnode_t));
-       loadmodel->brush.data_planes = Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_nodes * sizeof(mplane_t));
-       loadmodel->brush.num_leafs = 0;
-       loadmodel->brush.num_nodes = 0;
-       loadmodel->brush.num_planes = 0;
-       Mod_OBJ_ConvertAndFreeBSPNode(rootnode);
-
-       if (clippedfronttriangles)
-               Mem_Free(clippedfronttriangles);
-       maxclippedtriangles = 0;
-       clippedfronttriangles = NULL;
-       clippedbacktriangles = NULL;
-
---- NOTHING DONE PAST THIS POINT ---
-
-       loadmodel->numskins = LittleLong(pinmodel->num_skins);
-       numxyz = LittleLong(pinmodel->num_xyz);
-       numst = LittleLong(pinmodel->num_st);
-       loadmodel->surfmesh.num_triangles = LittleLong(pinmodel->num_tris);
-       loadmodel->numframes = LittleLong(pinmodel->num_frames);
-       loadmodel->surfmesh.num_morphframes = loadmodel->numframes;
-       loadmodel->num_poses = loadmodel->surfmesh.num_morphframes;
-       skinwidth = LittleLong(pinmodel->skinwidth);
-       skinheight = LittleLong(pinmodel->skinheight);
-       iskinwidth = 1.0f / skinwidth;
-       iskinheight = 1.0f / skinheight;
-
-       loadmodel->num_surfaces = 1;
-       loadmodel->nummodelsurfaces = loadmodel->num_surfaces;
-       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(msurface_t) + loadmodel->num_surfaces * sizeof(int) + loadmodel->numframes * sizeof(animscene_t) + loadmodel->numframes * sizeof(float[6]) + loadmodel->surfmesh.num_triangles * sizeof(int[3]) + loadmodel->surfmesh.num_triangles * sizeof(int[3]));
-       loadmodel->data_surfaces = (msurface_t *)data;data += loadmodel->num_surfaces * sizeof(msurface_t);
-       loadmodel->sortedmodelsurfaces = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
-       loadmodel->sortedmodelsurfaces[0] = 0;
-       loadmodel->animscenes = (animscene_t *)data;data += loadmodel->numframes * sizeof(animscene_t);
-       loadmodel->surfmesh.data_morphmd2framesize6f = (float *)data;data += loadmodel->numframes * sizeof(float[6]);
-       loadmodel->surfmesh.data_element3i = (int *)data;data += loadmodel->surfmesh.num_triangles * sizeof(int[3]);
-       loadmodel->surfmesh.data_neighbor3i = (int *)data;data += loadmodel->surfmesh.num_triangles * sizeof(int[3]);
-
-       loadmodel->synctype = ST_RAND;
-
-       // load the skins
-       inskin = (char *)(base + LittleLong(pinmodel->ofs_skins));
-       skinfiles = Mod_LoadSkinFiles();
-       if (skinfiles)
-       {
-               loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
-               loadmodel->num_texturesperskin = loadmodel->num_surfaces;
-               loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
-               Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures, skinfiles, "default", "");
-               Mod_FreeSkinFiles(skinfiles);
-       }
-       else if (loadmodel->numskins)
-       {
-               // skins found (most likely not a player model)
-               loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
-               loadmodel->num_texturesperskin = loadmodel->num_surfaces;
-               loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
-               for (i = 0;i < loadmodel->numskins;i++, inskin += MD2_SKINNAME)
-                       Mod_LoadTextureFromQ3Shader(loadmodel->data_textures + i * loadmodel->num_surfaces, inskin, true, true, (r_mipskins.integer ? TEXF_MIPMAP : 0) | TEXF_ALPHA | TEXF_PICMIP | TEXF_COMPRESS);
-       }
-       else
-       {
-               // no skins (most likely a player model)
-               loadmodel->numskins = 1;
-               loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
-               loadmodel->num_texturesperskin = loadmodel->num_surfaces;
-               loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
-               Mod_BuildAliasSkinFromSkinFrame(loadmodel->data_textures, NULL);
-       }
-
-       loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, sizeof(animscene_t) * loadmodel->numskins);
-       for (i = 0;i < loadmodel->numskins;i++)
-       {
-               loadmodel->skinscenes[i].firstframe = i;
-               loadmodel->skinscenes[i].framecount = 1;
-               loadmodel->skinscenes[i].loop = true;
-               loadmodel->skinscenes[i].framerate = 10;
-       }
-
-       // load the triangles and stvert data
-       inst = (unsigned short *)(base + LittleLong(pinmodel->ofs_st));
-       intri = (md2triangle_t *)(base + LittleLong(pinmodel->ofs_tris));
-       md2verthash = (struct md2verthash_s **)Mem_Alloc(tempmempool, 65536 * sizeof(hash));
-       md2verthashdata = (struct md2verthash_s *)Mem_Alloc(tempmempool, loadmodel->surfmesh.num_triangles * 3 * sizeof(*hash));
-       // swap the triangle list
-       loadmodel->surfmesh.num_vertices = 0;
-       for (i = 0;i < loadmodel->surfmesh.num_triangles;i++)
-       {
-               for (j = 0;j < 3;j++)
-               {
-                       xyz = (unsigned short) LittleShort (intri[i].index_xyz[j]);
-                       st = (unsigned short) LittleShort (intri[i].index_st[j]);
-                       if (xyz >= numxyz)
-                       {
-                               Con_Printf("%s has an invalid xyz index (%i) on triangle %i, resetting to 0\n", loadmodel->name, xyz, i);
-                               xyz = 0;
-                       }
-                       if (st >= numst)
-                       {
-                               Con_Printf("%s has an invalid st index (%i) on triangle %i, resetting to 0\n", loadmodel->name, st, i);
-                               st = 0;
-                       }
-                       hashindex = (xyz * 256 + st) & 65535;
-                       for (hash = md2verthash[hashindex];hash;hash = hash->next)
-                               if (hash->xyz == xyz && hash->st == st)
-                                       break;
-                       if (hash == NULL)
-                       {
-                               hash = md2verthashdata + loadmodel->surfmesh.num_vertices++;
-                               hash->xyz = xyz;
-                               hash->st = st;
-                               hash->next = md2verthash[hashindex];
-                               md2verthash[hashindex] = hash;
-                       }
-                       loadmodel->surfmesh.data_element3i[i*3+j] = (hash - md2verthashdata);
-               }
-       }
-
-       vertremap = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->surfmesh.num_vertices * sizeof(int));
-       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->surfmesh.num_vertices * sizeof(float[2]) + loadmodel->surfmesh.num_vertices * loadmodel->surfmesh.num_morphframes * sizeof(trivertx_t));
-       loadmodel->surfmesh.data_texcoordtexture2f = (float *)data;data += loadmodel->surfmesh.num_vertices * sizeof(float[2]);
-       loadmodel->surfmesh.data_morphmdlvertex = (trivertx_t *)data;data += loadmodel->surfmesh.num_vertices * loadmodel->surfmesh.num_morphframes * sizeof(trivertx_t);
-       for (i = 0;i < loadmodel->surfmesh.num_vertices;i++)
-       {
-               int sts, stt;
-               hash = md2verthashdata + i;
-               vertremap[i] = hash->xyz;
-               sts = LittleShort(inst[hash->st*2+0]);
-               stt = LittleShort(inst[hash->st*2+1]);
-               if (sts < 0 || sts >= skinwidth || stt < 0 || stt >= skinheight)
-               {
-                       Con_Printf("%s has an invalid skin coordinate (%i %i) on vert %i, changing to 0 0\n", loadmodel->name, sts, stt, i);
-                       sts = 0;
-                       stt = 0;
-               }
-               loadmodel->surfmesh.data_texcoordtexture2f[i*2+0] = sts * iskinwidth;
-               loadmodel->surfmesh.data_texcoordtexture2f[i*2+1] = stt * iskinheight;
-       }
-
-       Mem_Free(md2verthash);
-       Mem_Free(md2verthashdata);
-
-       // generate ushort elements array if possible
-       if (loadmodel->surfmesh.num_vertices <= 65536)
-               loadmodel->surfmesh.data_element3s = (unsigned short *)Mem_Alloc(loadmodel->mempool, sizeof(unsigned short[3]) * loadmodel->surfmesh.num_triangles);
-
-       // load the frames
-       datapointer = (base + LittleLong(pinmodel->ofs_frames));
-       for (i = 0;i < loadmodel->surfmesh.num_morphframes;i++)
-       {
-               int k;
-               trivertx_t *v;
-               trivertx_t *out;
-               pinframe = (md2frame_t *)datapointer;
-               datapointer += sizeof(md2frame_t);
-               // store the frame scale/translate into the appropriate array
-               for (j = 0;j < 3;j++)
-               {
-                       loadmodel->surfmesh.data_morphmd2framesize6f[i*6+j] = LittleFloat(pinframe->scale[j]);
-                       loadmodel->surfmesh.data_morphmd2framesize6f[i*6+3+j] = LittleFloat(pinframe->translate[j]);
-               }
-               // convert the vertices
-               v = (trivertx_t *)datapointer;
-               out = loadmodel->surfmesh.data_morphmdlvertex + i * loadmodel->surfmesh.num_vertices;
-               for (k = 0;k < loadmodel->surfmesh.num_vertices;k++)
-                       out[k] = v[vertremap[k]];
-               datapointer += numxyz * sizeof(trivertx_t);
-
-               strlcpy(loadmodel->animscenes[i].name, pinframe->name, sizeof(loadmodel->animscenes[i].name));
-               loadmodel->animscenes[i].firstframe = i;
-               loadmodel->animscenes[i].framecount = 1;
-               loadmodel->animscenes[i].framerate = 10;
-               loadmodel->animscenes[i].loop = true;
-       }
-
-       Mem_Free(vertremap);
-
-       Mod_MakeSortedSurfaces(loadmodel);
-       Mod_BuildTriangleNeighbors(loadmodel->surfmesh.data_neighbor3i, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles);
-       Mod_Alias_CalculateBoundingBox();
-       Mod_Alias_MorphMesh_CompileFrames();
-
-       surface = loadmodel->data_surfaces;
-       surface->texture = loadmodel->data_textures;
-       surface->num_firsttriangle = 0;
-       surface->num_triangles = loadmodel->surfmesh.num_triangles;
-       surface->num_firstvertex = 0;
-       surface->num_vertices = loadmodel->surfmesh.num_vertices;
-
-       loadmodel->surfmesh.isanimated = false;
-
-       if (loadmodel->surfmesh.data_element3s)
-               for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
-                       loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
-#endif
-}
-#endif // !OBJASMODEL
-
-qboolean Mod_CanSeeBox_Trace(int numsamples, float t, dp_model_t *model, vec3_t eye, vec3_t minsX, vec3_t maxsX)
-{
-       // we already have done PVS culling at this point...
-       // so we don't need to do it again.
-
-       int i;
-       vec3_t testorigin, mins, maxs;
-
-       testorigin[0] = (minsX[0] + maxsX[0]) * 0.5;
-       testorigin[1] = (minsX[1] + maxsX[1]) * 0.5;
-       testorigin[2] = (minsX[2] + maxsX[2]) * 0.5;
-
-       if(model->brush.TraceLineOfSight(model, eye, testorigin))
-               return 1;
+               if (j < mod->nummodelsurfaces)
+                       mod->DrawSky = R_Q1BSP_DrawSky;
 
-       // expand the box a little
-       mins[0] = (t+1) * minsX[0] - t * maxsX[0];
-       maxs[0] = (t+1) * maxsX[0] - t * minsX[0];
-       mins[1] = (t+1) * minsX[1] - t * maxsX[1];
-       maxs[1] = (t+1) * maxsX[1] - t * minsX[1];
-       mins[2] = (t+1) * minsX[2] - t * maxsX[2];
-       maxs[2] = (t+1) * maxsX[2] - t * minsX[2];
+               for (j = 0;j < mod->nummodelsurfaces;j++)
+                       if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA))
+                               break;
+               if (j < mod->nummodelsurfaces)
+                       mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
 
-       for(i = 0; i != numsamples; ++i)
-       {
-               testorigin[0] = lhrandom(mins[0], maxs[0]);
-               testorigin[1] = lhrandom(mins[1], maxs[1]);
-               testorigin[2] = lhrandom(mins[2], maxs[2]);
+               Mod_MakeCollisionBIH(mod, true, &mod->collision_bih);
+               mod->render_bih = mod->collision_bih;
 
-               if(model->brush.TraceLineOfSight(model, eye, testorigin))
-                       return 1;
+               // generate VBOs and other shared data before cloning submodels
+               if (i == 0)
+                       Mod_BuildVBOs();
        }
+       mod = loadmodel;
+       Mem_Free(submodelfirstsurface);
 
-       return 0;
+       Con_DPrintf("Stats for obj model \"%s\": %i faces, %i nodes, %i leafs, %i clusters, %i clusterportals, mesh: %i vertices, %i triangles, %i surfaces\n", loadmodel->name, loadmodel->num_surfaces, loadmodel->brush.num_nodes, loadmodel->brush.num_leafs, mod->brush.num_pvsclusters, loadmodel->brush.num_portals, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->num_surfaces);
 }
-