]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - model_brush.c
Reworked v_isometric code significantly, it now defaults to a proper isometric view...
[xonotic/darkplaces.git] / model_brush.c
index def4b1a3b2537daef17065a1b71292c4932963b4..eb37da166000f2d334051eb23946428bdad4c02f 100644 (file)
@@ -39,8 +39,10 @@ cvar_t r_subdivisions_collision_mintess = {0, "r_subdivisions_collision_mintess"
 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_q2bsp_littransparentsurfaces = {0, "mod_q2bsp_littransparentsurfaces", "0", "allows lighting on rain in 3v3gloom3 and other cases of transparent surfaces that have lightmaps that were ignored by quake2"};
 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)"};
@@ -56,6 +58,8 @@ cvar_t mod_q3shader_default_offsetmapping_bias = {CVAR_SAVE, "mod_q3shader_defau
 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"};
 cvar_t mod_recalculatenodeboxes = {0, "mod_recalculatenodeboxes", "1", "enables use of generated node bounding boxes based on BSP tree portal reconstruction, rather than the node boxes supplied by the map compiler"};
@@ -66,6 +70,8 @@ static texture_t mod_q1bsp_texture_lava;
 static texture_t mod_q1bsp_texture_slime;
 static texture_t mod_q1bsp_texture_water;
 
+static qboolean Mod_Q3BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end, const vec3_t acceptmins, const vec3_t acceptmaxs);
+
 void Mod_BrushInit(void)
 {
 //     Cvar_RegisterVariable(&r_subdivide_size);
@@ -81,8 +87,10 @@ void Mod_BrushInit(void)
        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_q2bsp_littransparentsurfaces);
        Cvar_RegisterVariable(&mod_q3bsp_curves_collisions);
        Cvar_RegisterVariable(&mod_q3bsp_curves_collisions_stride);
        Cvar_RegisterVariable(&mod_q3bsp_curves_stride);
@@ -98,6 +106,7 @@ void Mod_BrushInit(void)
        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);
@@ -631,7 +640,7 @@ static void Mod_Q1BSP_FindNonSolidLocation(dp_model_t *model, const vec3_t in, v
        VectorCopy(info.center, out);
 }
 
-int Mod_Q1BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativecontents)
+int Mod_Q1BSP_SuperContentsFromNativeContents(int nativecontents)
 {
        switch(nativecontents)
        {
@@ -651,7 +660,7 @@ int Mod_Q1BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativeconte
        return 0;
 }
 
-int Mod_Q1BSP_NativeContentsFromSuperContents(dp_model_t *model, int supercontents)
+int Mod_Q1BSP_NativeContentsFromSuperContents(int supercontents)
 {
        if (supercontents & (SUPERCONTENTS_SOLID | SUPERCONTENTS_BODY))
                return CONTENTS_SOLID;
@@ -688,7 +697,6 @@ 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
@@ -700,156 +708,151 @@ 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);
+       // we reached a leaf contents
 
-       // 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;
-
-       // front is air and back is solid, this is the impact point...
-       if (side)
+       // check for empty
+       num = Mod_Q1BSP_SuperContentsFromNativeContents(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
@@ -865,7 +868,7 @@ static int Mod_Q1BSP_RecursiveHullCheckPoint(RecursiveHullCheckTraceInfo_t *t, i
                plane = planes + nodes[num].planenum;
                num = nodes[num].children[(plane->type < 3 ? point[plane->type] : DotProduct(plane->normal, point)) < plane->dist];
        }
-       num = Mod_Q1BSP_SuperContentsFromNativeContents(NULL, num);
+       num = Mod_Q1BSP_SuperContentsFromNativeContents(num);
        t->trace->startsupercontents |= num;
        if (num & SUPERCONTENTS_LIQUIDSMASK)
                t->trace->inwater = true;
@@ -884,7 +887,7 @@ static int Mod_Q1BSP_RecursiveHullCheckPoint(RecursiveHullCheckTraceInfo_t *t, i
 }
 //#endif
 
-static void Mod_Q1BSP_TracePoint(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask)
+static void Mod_Q1BSP_TracePoint(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        RecursiveHullCheckTraceInfo_t rhc;
 
@@ -892,7 +895,6 @@ 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);
@@ -900,13 +902,22 @@ static void Mod_Q1BSP_TracePoint(struct model_s *model, const frameblend_t *fram
        Mod_Q1BSP_RecursiveHullCheckPoint(&rhc, rhc.hull->firstclipnode);
 }
 
-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)
+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, int skipsupercontentsmask, int skipmaterialflagsmask);
+
+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, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        RecursiveHullCheckTraceInfo_t rhc;
 
        if (VectorCompare(start, end))
        {
-               Mod_Q1BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+               Mod_Q1BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
+               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, skipsupercontentsmask, skipmaterialflagsmask);
                return;
        }
 
@@ -914,8 +925,9 @@ static void Mod_Q1BSP_TraceLine(struct model_s *model, const frameblend_t *frame
        memset(trace, 0, sizeof(trace_t));
        rhc.trace = trace;
        rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
+       rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
+       rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
        rhc.trace->fraction = 1;
-       rhc.trace->realfraction = 1;
        rhc.trace->allsolid = true;
        rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
        VectorCopy(start, rhc.start);
@@ -932,8 +944,9 @@ static void Mod_Q1BSP_TraceLine(struct model_s *model, const frameblend_t *frame
                memset(&testtrace, 0, sizeof(trace_t));
                rhc.trace = &testtrace;
                rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
+               rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
+               rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
                rhc.trace->fraction = 1;
-               rhc.trace->realfraction = 1;
                rhc.trace->allsolid = true;
                VectorCopy(test, rhc.start);
                VectorCopy(test, rhc.end);
@@ -952,7 +965,7 @@ static void Mod_Q1BSP_TraceLine(struct model_s *model, const frameblend_t *frame
 #endif
 }
 
-static void Mod_Q1BSP_TraceBox(struct model_s *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_Q1BSP_TraceBox(struct model_s *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, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        // this function currently only supports same size start and end
        double boxsize[3];
@@ -961,9 +974,9 @@ static void Mod_Q1BSP_TraceBox(struct model_s *model, const frameblend_t *frameb
        if (VectorCompare(boxmins, boxmaxs))
        {
                if (VectorCompare(start, end))
-                       Mod_Q1BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+                       Mod_Q1BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                else
-                       Mod_Q1BSP_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
+                       Mod_Q1BSP_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                return;
        }
 
@@ -971,8 +984,9 @@ static void Mod_Q1BSP_TraceBox(struct model_s *model, const frameblend_t *frameb
        memset(trace, 0, sizeof(trace_t));
        rhc.trace = trace;
        rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
+       rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
+       rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
        rhc.trace->fraction = 1;
-       rhc.trace->realfraction = 1;
        rhc.trace->allsolid = true;
        VectorSubtract(boxmaxs, boxmins, boxsize);
        if (boxsize[0] < 3)
@@ -1014,8 +1028,9 @@ static void Mod_Q1BSP_TraceBox(struct model_s *model, const frameblend_t *frameb
                memset(&testtrace, 0, sizeof(trace_t));
                rhc.trace = &testtrace;
                rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
+               rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
+               rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
                rhc.trace->fraction = 1;
-               rhc.trace->realfraction = 1;
                rhc.trace->allsolid = true;
                VectorCopy(test, rhc.start);
                VectorCopy(test, rhc.end);
@@ -1045,10 +1060,10 @@ static int Mod_Q1BSP_PointSuperContents(struct model_s *model, int frame, const
                plane = planes + nodes[num].planenum;
                num = nodes[num].children[(plane->type < 3 ? point[plane->type] : DotProduct(plane->normal, point)) < plane->dist];
        }
-       return Mod_Q1BSP_SuperContentsFromNativeContents(NULL, num);
+       return Mod_Q1BSP_SuperContentsFromNativeContents(num);
 }
 
-void Collision_ClipTrace_Box(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int hitsupercontentsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture)
+void Collision_ClipTrace_Box(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture)
 {
 #if 1
        colbrushf_t cbox;
@@ -1083,8 +1098,9 @@ void Collision_ClipTrace_Box(trace_t *trace, const vec3_t cmins, const vec3_t cm
        cbox_planes[5].q3surfaceflags = boxq3surfaceflags;cbox_planes[5].texture = boxtexture;
        memset(trace, 0, sizeof(trace_t));
        trace->hitsupercontentsmask = hitsupercontentsmask;
+       trace->skipsupercontentsmask = skipsupercontentsmask;
+       trace->skipmaterialflagsmask = skipmaterialflagsmask;
        trace->fraction = 1;
-       trace->realfraction = 1;
        Collision_TraceLineBrushFloat(trace, start, end, &cbox, &cbox);
 #else
        RecursiveHullCheckTraceInfo_t rhc;
@@ -1141,8 +1157,9 @@ void Collision_ClipTrace_Box(trace_t *trace, const vec3_t cmins, const vec3_t cm
        rhc.hull = &box_hull;
        rhc.trace = trace;
        rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
+       rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
+       rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
        rhc.trace->fraction = 1;
-       rhc.trace->realfraction = 1;
        rhc.trace->allsolid = true;
        VectorCopy(start, rhc.start);
        VectorCopy(end, rhc.end);
@@ -1154,15 +1171,17 @@ void Collision_ClipTrace_Box(trace_t *trace, const vec3_t cmins, const vec3_t cm
 #endif
 }
 
-void Collision_ClipTrace_Point(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, int hitsupercontentsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture)
+void Collision_ClipTrace_Point(trace_t *trace, const vec3_t cmins, const vec3_t cmaxs, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, int boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture)
 {
        memset(trace, 0, sizeof(trace_t));
        trace->fraction = 1;
-       trace->realfraction = 1;
+       trace->hitsupercontentsmask = hitsupercontentsmask;
+       trace->skipsupercontentsmask = skipsupercontentsmask;
+       trace->skipmaterialflagsmask = skipmaterialflagsmask;
        if (BoxesOverlap(start, start, cmins, cmaxs))
        {
                trace->startsupercontents |= boxsupercontents;
-               if (hitsupercontentsmask & boxsupercontents)
+               if ((hitsupercontentsmask & boxsupercontents) && !(skipsupercontentsmask & boxsupercontents))
                {
                        trace->startsolid = true;
                        trace->allsolid = true;
@@ -1170,11 +1189,11 @@ 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)
+static qboolean Mod_Q1BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end, const vec3_t acceptmins, const vec3_t acceptmaxs)
 {
        trace_t trace;
-       Mod_Q1BSP_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK);
-       return trace.fraction == 1;
+       Mod_Q1BSP_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK, 0, MATERIALFLAGMASK_TRANSLUCENT);
+       return trace.fraction == 1 || BoxesOverlap(trace.endpos, trace.endpos, acceptmins, acceptmaxs);
 }
 
 static int Mod_Q1BSP_LightPoint_RecursiveBSPNode(dp_model_t *model, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal, const mnode_t *node, float x, float y, float startz, float endz)
@@ -1183,52 +1202,50 @@ 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;
@@ -1248,22 +1265,44 @@ 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
@@ -1275,7 +1314,7 @@ 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);
@@ -1292,8 +1331,11 @@ 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;
 }
 
 static void Mod_Q1BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
@@ -1313,7 +1355,7 @@ static void Mod_Q1BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambie
 
 static const texture_t *Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(RecursiveHullCheckTraceInfo_t *t, const dp_model_t *model, const mnode_t *node, double mid[3])
 {
-       int i;
+       unsigned int i;
        int j;
        int k;
        const msurface_t *surface;
@@ -1337,6 +1379,12 @@ static const texture_t *Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(Recu
                // skip faces with contents we don't care about
                if (!(t->trace->hitsupercontentsmask & surface->texture->supercontents))
                        continue;
+               // ignore surfaces matching the skipsupercontentsmask (this is rare)
+               if (t->trace->skipsupercontentsmask & surface->texture->supercontents)
+                       continue;
+               // skip surfaces matching the skipmaterialflagsmask (e.g. MATERIALFLAG_NOSHADOW)
+               if (t->trace->skipmaterialflagsmask & surface->texture->currentmaterialflags)
+                       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
@@ -1360,19 +1408,12 @@ static const texture_t *Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(Recu
                VectorCopy(normal, t->trace->plane.normal);
                t->trace->plane.dist = DotProduct(normal, p);
 
-               // calculate the true fraction
+               // 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 / (t1 - t2);
-               t->trace->realfraction = midf;
-
-               // calculate the return fraction which is nudged off the surface a bit
-               midf = (t1 - DIST_EPSILON) / (t1 - t2);
+               midf = (t1 - collision_impactnudge.value) / (t1 - t2);
                t->trace->fraction = bound(0, midf, 1);
 
-               if (collision_prefernudgedfraction.integer)
-                       t->trace->realfraction = t->trace->fraction;
-
                t->trace->hittexture = surface->texture->currentframe;
                t->trace->hitq3surfaceflags = t->trace->hittexture->surfaceflags;
                t->trace->hitsupercontents = t->trace->hittexture->supercontents;
@@ -1450,7 +1491,7 @@ static int Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(RecursiveHullCheck
                return Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side ^ 1], mid, p2);
        }
        leaf = (const mleaf_t *)node;
-       side = Mod_Q1BSP_SuperContentsFromNativeContents(NULL, leaf->contents);
+       side = Mod_Q1BSP_SuperContentsFromNativeContents(leaf->contents);
        if (!t->trace->startfound)
        {
                t->trace->startfound = true;
@@ -1474,7 +1515,7 @@ static int Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(RecursiveHullCheck
        }
 }
 
-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_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, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        RecursiveHullCheckTraceInfo_t rhc;
 
@@ -1482,8 +1523,9 @@ static void Mod_Q1BSP_TraceLineAgainstSurfaces(struct model_s *model, const fram
        memset(trace, 0, sizeof(trace_t));
        rhc.trace = trace;
        rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
+       rhc.trace->skipsupercontentsmask = skipsupercontentsmask;
+       rhc.trace->skipmaterialflagsmask = skipmaterialflagsmask;
        rhc.trace->fraction = 1;
-       rhc.trace->realfraction = 1;
        rhc.trace->allsolid = true;
        rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
        VectorCopy(start, rhc.start);
@@ -1602,9 +1644,9 @@ static void R_Q1BSP_LoadSplitSky (unsigned char *src, int width, int height, int
 
 static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
 {
-       int i, j, k, num, max, altmax, mtwidth, mtheight, doffset, incomplete, nummiptex = 0;
-       skinframe_t *skinframe;
-       texture_t *tx, *tx2, *anims[10], *altanims[10];
+       int i, j, k, num, max, altmax, mtwidth, mtheight, doffset, incomplete, nummiptex = 0, firstskynoshadowtexture = 0;
+       skinframe_t *skinframemissing;
+       texture_t *tx, *tx2, *anims[10], *altanims[10], *currentskynoshadowtexture;
        texture_t backuptex;
        unsigned char *data, *mtdata;
        const char *s;
@@ -1617,38 +1659,75 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
 
        loadmodel->data_textures = NULL;
 
-       // add two slots for notexture walls and notexture liquids
+       // add two slots for notexture walls and notexture liquids, and duplicate
+       // all sky textures; sky surfaces can be shadow-casting or not, the surface
+       // loading will choose according to the contents behind the surface
+       // (necessary to support e1m5 logo shadow which has a SKY contents brush,
+       // while correctly treating sky textures as occluders in other situations).
        if (sb->cursize)
        {
+               int numsky = 0;
+               size_t watermark;
                nummiptex = MSG_ReadLittleLong(sb);
                loadmodel->num_textures = nummiptex + 2;
-               loadmodel->num_texturesperskin = loadmodel->num_textures;
+               // save the position so we can go back to it
+               watermark = sb->readcount;
+               for (i = 0; i < nummiptex; i++)
+               {
+                       doffset = MSG_ReadLittleLong(sb);
+                       if (r_nosurftextures.integer)
+                               continue;
+                       if (doffset == -1)
+                       {
+                               Con_DPrintf("%s: miptex #%i missing\n", loadmodel->name, i);
+                               continue;
+                       }
+
+                       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; j++)
+                               name[j] = MSG_ReadByte(&miptexsb);
+                       name[j] = 0;
+                       // pretty up the buffer (replacing any trailing garbage with 0)
+                       for (j = (int)strlen(name); j < 16; j++)
+                               name[j] = 0;
+
+                       if (!strncmp(name, "sky", 3))
+                               numsky++;
+               }
+
+               // bump it back to where we started parsing
+               sb->readcount = watermark;
+
+               firstskynoshadowtexture = loadmodel->num_textures;
+               loadmodel->num_textures += numsky;
        }
        else
        {
                loadmodel->num_textures = 2;
-               loadmodel->num_texturesperskin = loadmodel->num_textures;
+               firstskynoshadowtexture = loadmodel->num_textures;
        }
+       loadmodel->num_texturesperskin = loadmodel->num_textures;
 
        loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_textures * sizeof(texture_t));
 
+       // we'll be writing to these in parallel for sky textures
+       currentskynoshadowtexture = loadmodel->data_textures + firstskynoshadowtexture;
+
        // fill out all slots with notexture
-       if (cls.state != ca_dedicated)
-               skinframe = R_SkinFrame_LoadMissing();
-       else
-               skinframe = NULL;
+       skinframemissing = R_SkinFrame_LoadMissing();
        for (i = 0, tx = loadmodel->data_textures;i < loadmodel->num_textures;i++, tx++)
        {
                strlcpy(tx->name, "NO TEXTURE FOUND", sizeof(tx->name));
                tx->width = 16;
                tx->height = 16;
-               if (cls.state != ca_dedicated)
-               {
-                       tx->numskinframes = 1;
-                       tx->skinframerate = 1;
-                       tx->skinframes[0] = skinframe;
-                       tx->currentskinframe = tx->skinframes[0];
-               }
+               tx->basealpha = 1.0f;
+               tx->materialshaderpass = tx->shaderpasses[0] = Mod_CreateShaderPass(loadmodel->mempool, skinframemissing);
+               tx->materialshaderpass->skinframes[0] = skinframemissing;
+               tx->currentskinframe = skinframemissing;
                tx->basematerialflags = MATERIALFLAG_WALL;
                if (i == loadmodel->num_textures - 1)
                {
@@ -1676,6 +1755,9 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                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 (!sb->cursize)
@@ -1689,7 +1771,6 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                s += 5;
        FS_StripExtension(s, mapname, sizeof(mapname));
 
-       // just to work around bounds checking when debugging with it (array index out of bounds error thing)
        // LordHavoc: mostly rewritten map texture loader
        for (i = 0;i < nummiptex;i++)
        {
@@ -1711,7 +1792,7 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                        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++)
+               for (j = (int)strlen(name);j < 16;j++)
                        name[j] = 0;
 
                if (!name[0])
@@ -1745,7 +1826,7 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
 
                // 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))
+               if (name[0] && Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, loadmodel->data_textures + i, name, false, false, 0, MATERIALFLAG_WALL))
                        continue;
                loadmodel->data_textures[i] = backuptex;
 
@@ -1753,6 +1834,11 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                strlcpy(tx->name, name, sizeof(tx->name));
                tx->width = mtwidth;
                tx->height = mtheight;
+               tx->basealpha = 1.0f;
+
+               // start out with no animation
+               tx->currentframe = tx;
+               tx->currentskinframe = tx->materialshaderpass != NULL ? tx->materialshaderpass->skinframes[0] : NULL;
 
                if (tx->name[0] == '*')
                {
@@ -1776,7 +1862,8 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                {
                        tx->supercontents = mod_q1bsp_texture_sky.supercontents;
                        tx->surfaceflags = mod_q1bsp_texture_sky.surfaceflags;
-                       tx->supercontents |= SUPERCONTENTS_SOLID; // for the surface traceline we need to hit this surface as a solid...
+                       // for the surface traceline we need to hit this surface as a solid...
+                       tx->supercontents |= SUPERCONTENTS_SOLID;
                }
                else
                {
@@ -1802,9 +1889,9 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                        }
                        else
                        {
-                               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);
+                               skinframe_t *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, false);
                                if (!skinframe)
-                                       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);
+                                       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, false);
                                if (skinframe)
                                        tx->offsetmapping = OFFSETMAPPING_DEFAULT; // allow offsetmapping on external textures without a q3 shader
                                if (!skinframe)
@@ -1831,15 +1918,16 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                                        else if (mtdata) // texture included
                                                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 is still NULL the "missing" texture has already been assigned to this
                                if (skinframe)
-                                       tx->skinframes[0] = skinframe;
+                                       tx->materialshaderpass->skinframes[0] = skinframe;
                        }
                        // 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);
+                               tx->materialshaderpass->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_MIPMAP | TEXF_ALPHA, zerotrans, 1, 1, false);
                        else if (!strncmp(tx->name, "mirror", 6)) // Tenebrae
-                               tx->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, 0, zeroopaque, 1, 1, false);
+                               tx->materialshaderpass->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, 0, zeroopaque, 1, 1, false);
+                       tx->currentskinframe = tx->materialshaderpass->skinframes[0];
                }
 
                tx->basematerialflags = MATERIALFLAG_WALL;
@@ -1854,25 +1942,34 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                                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)
+                       if (tx->currentskinframe != NULL && tx->currentskinframe->hasalpha)
                                tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
                }
+               else if (tx->name[0] == '{') // fence textures
+               {
+                       tx->basematerialflags |= MATERIALFLAG_ALPHATEST | 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;
+                       tx->basematerialflags = MATERIALFLAG_SKY;
                else if (!strcmp(tx->name, "caulk"))
                        tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
-               else if (tx->skinframes[0] && tx->skinframes[0]->hasalpha)
+               else if (tx->currentskinframe != NULL && tx->currentskinframe->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;
+
+               // duplicate of sky with NOSHADOW
+               if (tx->basematerialflags & MATERIALFLAG_SKY)
+               {
+                       *currentskynoshadowtexture = *tx;
+                       currentskynoshadowtexture->basematerialflags |= MATERIALFLAG_NOSHADOW;
+                       tx->skynoshadowtexture = currentskynoshadowtexture;
+                       currentskynoshadowtexture++;
+               }
        }
 
        // sequence the animations
@@ -1881,6 +1978,12 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                tx = loadmodel->data_textures + i;
                if (!tx || tx->name[0] != '+' || tx->name[1] == 0 || tx->name[2] == 0)
                        continue;
+               num = tx->name[1];
+               if ((num < '0' || num > '9') && (num < 'a' || num > 'j'))
+               {
+                       Con_Printf("Bad animating texture %s\n", tx->name);
+                       continue;
+               }
                if (tx->anim_total[0] || tx->anim_total[1])
                        continue;       // already sequenced
 
@@ -1899,8 +2002,7 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                                anims[num - '0'] = tx2;
                        else if (num >= 'a' && num <= 'j')
                                altanims[num - 'a'] = tx2;
-                       else
-                               Con_Printf("Bad animating texture %s\n", tx->name);
+                       // No need to warn otherwise - we already did above.
                }
 
                max = altmax = 0;
@@ -1933,6 +2035,12 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                if (incomplete)
                        continue;
 
+               // If we have exactly one frame, something's wrong.
+               if (max + altmax <= 1)
+               {
+                       Con_Printf("Texture %s is animated (leading +) but has only one frame\n", tx->name);
+               }
+
                if (altmax < 1)
                {
                        // if there is no alternate animation, duplicate the primary
@@ -1942,11 +2050,23 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                                altanims[k] = anims[k];
                }
 
+               if (max < 1)
+               {
+                       // Warn.
+                       Con_Printf("Missing frame 0 of %s\n", tx->name);
+
+                       // however, we can handle this by duplicating the alternate animation into the primary
+                       max = altmax;
+                       for (k = 0;k < 10;k++)
+                               anims[k] = altanims[k];
+               }
+
+
                // link together the primary animation
                for (j = 0;j < max;j++)
                {
                        tx2 = anims[j];
-                       tx2->animated = true;
+                       tx2->animated = 1; // q1bsp
                        tx2->anim_total[0] = max;
                        tx2->anim_total[1] = altmax;
                        for (k = 0;k < 10;k++)
@@ -1963,7 +2083,7 @@ static void Mod_Q1BSP_LoadTextures(sizebuf_t *sb)
                        for (j = 0;j < altmax;j++)
                        {
                                tx2 = altanims[j];
-                               tx2->animated = true;
+                               tx2->animated = 1; // q1bsp
                                // the primary/alternate are reversed here
                                tx2->anim_total[0] = altmax;
                                tx2->anim_total[1] = max;
@@ -2106,7 +2226,7 @@ static void Mod_Q1BSP_ParseWadsFromEntityLump(const char *data)
                                for (i = 0;i < (int)sizeof(value);i++)
                                        if (value[i] != ';' && value[i] != '\\' && value[i] != '/' && value[i] != ':')
                                                break;
-                               if (value[i])
+                               if (i < (int)sizeof(value) && value[i])
                                {
                                        for (;i < (int)sizeof(value);i++)
                                        {
@@ -2146,7 +2266,7 @@ static void Mod_Q1BSP_LoadVertexes(sizebuf_t *sb)
 {
        mvertex_t       *out;
        int                     i, count;
-       size_t          structsize = 12;
+       int                     structsize = 12;
 
        if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadVertexes: funny lump size in %s",loadmodel->name);
@@ -2168,7 +2288,7 @@ static void Mod_Q1BSP_LoadSubmodels(sizebuf_t *sb, hullinfo_t *hullinfo)
 {
        mmodel_t        *out;
        int                     i, j, count;
-       size_t structsize = (48+4*hullinfo->filehulls);
+       int                     structsize = (48+4*hullinfo->filehulls);
 
        if (sb->cursize % structsize)
                Host_Error ("Mod_Q1BSP_LoadSubmodels: funny lump size in %s", loadmodel->name);
@@ -2203,7 +2323,7 @@ static void Mod_Q1BSP_LoadEdges(sizebuf_t *sb)
 {
        medge_t *out;
        int     i, count;
-       size_t  structsize = loadmodel->brush.isbsp2 ? 8 : 4;
+       int             structsize = loadmodel->brush.isbsp2 ? 8 : 4;
 
        if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadEdges: funny lump size in %s",loadmodel->name);
@@ -2225,7 +2345,7 @@ static void Mod_Q1BSP_LoadEdges(sizebuf_t *sb)
                        out->v[0] = (unsigned short)MSG_ReadLittleShort(sb);
                        out->v[1] = (unsigned short)MSG_ReadLittleShort(sb);
                }
-               if (out->v[0] >= loadmodel->brushq1.numvertexes || out->v[1] >= loadmodel->brushq1.numvertexes)
+               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)
@@ -2241,7 +2361,7 @@ static void Mod_Q1BSP_LoadTexinfo(sizebuf_t *sb)
 {
        mtexinfo_t *out;
        int i, j, k, count, miptex;
-       size_t structsize = 40;
+       int structsize = 40;
 
        if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
@@ -2258,28 +2378,26 @@ static void Mod_Q1BSP_LoadTexinfo(sizebuf_t *sb)
                                out->vecs[k][j] = MSG_ReadLittleFloat(sb);
 
                miptex = MSG_ReadLittleLong(sb);
-               out->flags = MSG_ReadLittleLong(sb);
+               out->q1flags = MSG_ReadLittleLong(sb);
 
-               out->texture = NULL;
-               if (loadmodel->data_textures)
-               {
-                       if ((unsigned int) miptex >= (unsigned int) loadmodel->num_textures)
-                               Con_Printf("error in model \"%s\": invalid miptex index %i(of %i)\n", loadmodel->name, miptex, loadmodel->num_textures);
-                       else
-                               out->texture = loadmodel->data_textures + miptex;
-               }
-               if (out->flags & TEX_SPECIAL)
+               if (out->q1flags & TEX_SPECIAL)
                {
                        // if texture chosen is NULL or the shader needs a lightmap,
                        // force to notexture water shader
-                       if (out->texture == NULL)
-                               out->texture = loadmodel->data_textures + (loadmodel->num_textures - 1);
+                       out->textureindex = loadmodel->num_textures - 1;
                }
                else
                {
                        // if texture chosen is NULL, force to notexture
-                       if (out->texture == NULL)
-                               out->texture = loadmodel->data_textures + (loadmodel->num_textures - 2);
+                       out->textureindex = loadmodel->num_textures - 2;
+               }
+               // see if the specified miptex is valid and try to use it instead
+               if (loadmodel->data_textures)
+               {
+                       if ((unsigned int) miptex >= (unsigned int) loadmodel->num_textures)
+                               Con_Printf("error in model \"%s\": invalid miptex index %i(of %i)\n", loadmodel->name, miptex, loadmodel->num_textures);
+                       else
+                               out->textureindex = miptex;
                }
        }
 }
@@ -2444,7 +2562,7 @@ static void Mod_Q1BSP_LoadFaces(sizebuf_t *sb)
        float texmins[2], texmaxs[2], val;
        rtexture_t *lightmaptexture, *deluxemaptexture;
        char vabuf[1024];
-       size_t structsize = loadmodel->brush.isbsp2 ? 28 : 20;
+       int structsize = loadmodel->brush.isbsp2 ? 28 : 20;
 
        if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadFaces: funny lump size in %s",loadmodel->name);
@@ -2482,6 +2600,7 @@ static void Mod_Q1BSP_LoadFaces(sizebuf_t *sb)
        for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
        {
                surface->lightmapinfo = loadmodel->data_surfaces_lightmapinfo + surfacenum;
+               // the struct on disk is the same in BSP29 (Q1), BSP30 (HL1), and IBSP38 (Q2)
                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);
@@ -2500,7 +2619,11 @@ static void Mod_Q1BSP_LoadFaces(sizebuf_t *sb)
                        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->texture = loadmodel->data_textures + surface->lightmapinfo->texinfo->textureindex;
+
+               // Q2BSP doesn't use lightmaps on sky or warped surfaces (water), but still has a lightofs of 0
+               if (lightmapoffset == 0 && (surface->texture->q2flags & (Q2SURF_SKY | Q2SURF_WARP)))
+                       lightmapoffset = -1;
 
                //surface->flags = surface->texture->flags;
                //if (LittleShort(in->side))
@@ -2576,7 +2699,7 @@ static void Mod_Q1BSP_LoadFaces(sizebuf_t *sb)
                        surface->lightmapinfo->samples = NULL;
 #if 1
                        // give non-lightmapped water a 1x white lightmap
-                       if (surface->texture->name[0] == '*' && (surface->lightmapinfo->texinfo->flags & TEX_SPECIAL) && ssize <= 256 && tsize <= 256)
+                       if (!loadmodel->brush.isq2bsp && surface->texture->name[0] == '*' && (surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) && ssize <= 256 && tsize <= 256)
                        {
                                surface->lightmapinfo->samples = (unsigned char *)Mem_Alloc(loadmodel->mempool, ssize * tsize * 3);
                                surface->lightmapinfo->styles[0] = 0;
@@ -2584,7 +2707,7 @@ static void Mod_Q1BSP_LoadFaces(sizebuf_t *sb)
                        }
 #endif
                }
-               else if (loadmodel->brush.ishlbsp) // LordHavoc: HalfLife map (bsp version 30)
+               else if (loadmodel->brush.ishlbsp || loadmodel->brush.isq2bsp) // LordHavoc: HalfLife map (bsp version 30)
                        surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + lightmapoffset;
                else // LordHavoc: white lighting (bsp version 29)
                {
@@ -2594,7 +2717,7 @@ static void Mod_Q1BSP_LoadFaces(sizebuf_t *sb)
                }
 
                // check if we should apply a lightmap to this
-               if (!(surface->lightmapinfo->texinfo->flags & TEX_SPECIAL) || surface->lightmapinfo->samples)
+               if (!(surface->lightmapinfo->texinfo->q1flags & TEX_SPECIAL) || surface->lightmapinfo->samples)
                {
                        if (ssize > 256 || tsize > 256)
                                Host_Error("Bad surface extents");
@@ -2632,10 +2755,10 @@ static void Mod_Q1BSP_LoadFaces(sizebuf_t *sb)
                int stainmapsize = 0;
                mod_alloclightmap_state_t allocState;
 
-               Mod_AllocLightmap_Init(&allocState, lightmapsize, lightmapsize);
+               Mod_AllocLightmap_Init(&allocState, loadmodel->mempool, lightmapsize, lightmapsize);
                for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
                {
-                       int i, iu, iv, lightmapx = 0, lightmapy = 0;
+                       int iu, iv, lightmapx = 0, lightmapy = 0;
                        float u, v, ubase, vbase, uscale, vscale;
 
                        if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
@@ -2752,7 +2875,7 @@ static void Mod_Q1BSP_LoadNodes(sizebuf_t *sb)
 {
        int                     i, j, count, p, child[2];
        mnode_t         *out;
-       size_t structsize = loadmodel->brush.isbsp2 ? 44 : 24;
+       int structsize = loadmodel->brush.isbsp2rmqe ? 32 : (loadmodel->brush.isbsp2 ? 44 : 24);
 
        if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadNodes: funny lump size in %s",loadmodel->name);
@@ -2769,7 +2892,20 @@ static void Mod_Q1BSP_LoadNodes(sizebuf_t *sb)
                p = MSG_ReadLittleLong(sb);
                out->plane = loadmodel->brush.data_planes + p;
 
-               if (loadmodel->brush.isbsp2)
+               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);
@@ -2843,7 +2979,7 @@ static void Mod_Q1BSP_LoadLeafs(sizebuf_t *sb)
 {
        mleaf_t *out;
        int i, j, count, p, firstmarksurface, nummarksurfaces;
-       size_t structsize = loadmodel->brush.isbsp2 ? 44 : 28;
+       int structsize = loadmodel->brush.isbsp2rmqe ? 32 : (loadmodel->brush.isbsp2 ? 44 : 28);
 
        if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
@@ -2877,7 +3013,19 @@ static void Mod_Q1BSP_LoadLeafs(sizebuf_t *sb)
                                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);
                }
 
-               if (loadmodel->brush.isbsp2)
+               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);
@@ -2947,7 +3095,7 @@ static void Mod_Q1BSP_LoadClipnodes(sizebuf_t *sb, hullinfo_t *hullinfo)
        mclipnode_t *out;
        int                     i, count;
        hull_t          *hull;
-       size_t structsize = loadmodel->brush.isbsp2 ? 12 : 8;
+       int structsize = loadmodel->brush.isbsp2 ? 12 : 8;
 
        if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadClipnodes: funny lump size in %s",loadmodel->name);
@@ -3029,7 +3177,7 @@ static void Mod_Q1BSP_MakeHull0(void)
 static void Mod_Q1BSP_LoadLeaffaces(sizebuf_t *sb)
 {
        int i, j;
-       size_t structsize = loadmodel->brush.isbsp2 ? 4 : 2;
+       int structsize = loadmodel->brush.isbsp2 ? 4 : 2;
 
        if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadLeaffaces: funny lump size in %s",loadmodel->name);
@@ -3061,7 +3209,7 @@ static void Mod_Q1BSP_LoadLeaffaces(sizebuf_t *sb)
 static void Mod_Q1BSP_LoadSurfedges(sizebuf_t *sb)
 {
        int             i;
-       size_t structsize = 4;
+       int structsize = 4;
 
        if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadSurfedges: funny lump size in %s",loadmodel->name);
@@ -3077,7 +3225,7 @@ static void Mod_Q1BSP_LoadPlanes(sizebuf_t *sb)
 {
        int                     i;
        mplane_t        *out;
-       size_t structsize = 20;
+       int structsize = 20;
 
        if (sb->cursize % structsize)
                Host_Error("Mod_Q1BSP_LoadPlanes: funny lump size in %s", loadmodel->name);
@@ -3095,6 +3243,26 @@ static void Mod_Q1BSP_LoadPlanes(sizebuf_t *sb)
        }
 }
 
+// fixes up sky surfaces that have SKY contents behind them, so that they do not cast shadows (e1m5 logo shadow trick).
+static void Mod_Q1BSP_AssignNoShadowSkySurfaces(dp_model_t *mod)
+{
+       int i;
+       msurface_t *surface;
+       vec3_t center;
+       int contents;
+       for (i = 0, surface = mod->data_surfaces + mod->firstmodelsurface; i < mod->nummodelsurfaces; i++, surface++)
+       {
+               if (surface->texture->basematerialflags & MATERIALFLAG_SKY)
+               {
+                       // check if the point behind the surface polygon is SOLID or SKY contents
+                       VectorMAMAM(0.5f, surface->mins, 0.5f, surface->maxs, -0.25f, mod->surfmesh.data_normal3f + 3*surface->num_firstvertex, center);
+                       contents = Mod_Q1BSP_PointSuperContents(mod, 0, center);
+                       if (!(contents & SUPERCONTENTS_SOLID))
+                               surface->texture = surface->texture->skynoshadowtexture;
+               }
+       }
+}
+
 static void Mod_Q1BSP_LoadMapBrushes(void)
 {
 #if 0
@@ -3227,7 +3395,7 @@ static void Mod_Q1BSP_RecursiveRecalcNodeBBox(mnode_t *node)
 
 static void Mod_Q1BSP_FinalizePortals(void)
 {
-       int i, j, numportals, numpoints, portalindex, portalrange = Mem_ExpandableArray_IndexRange(&portalarray);
+       int i, j, numportals, numpoints, portalindex, portalrange = (int)Mem_ExpandableArray_IndexRange(&portalarray);
        portal_t *p;
        mportal_t *portal;
        mvertex_t *point;
@@ -3467,7 +3635,7 @@ 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;
@@ -3482,7 +3650,10 @@ 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];
@@ -3515,7 +3686,10 @@ 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;
@@ -3703,7 +3877,7 @@ static int Mod_Q1BSP_CreateShadowMesh(dp_model_t *mod)
        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_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, int skipsupercontentsmask, int skipmaterialflagsmask);
 
 void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
@@ -3718,12 +3892,16 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        unsigned char *datapointer;
        sizebuf_t sb;
 
-       MSG_InitReadBuffer(&sb, (unsigned char *)buffer, bufferend - buffer);
+       MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
 
        mod->type = mod_brushq1;
 
-       mod->brush.isbsp2 = false;
        mod->brush.ishlbsp = false;
+       mod->brush.isbsp2rmqe = false;
+       mod->brush.isbsp2 = false;
+       mod->brush.isq2bsp = false;
+       mod->brush.isq3bsp = false;
+       mod->brush.skymasking = true;
        i = MSG_ReadLittleLong(&sb);
        switch(i)
        {
@@ -3734,13 +3912,18 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                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\"", mod->name, i);
+               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;
        }
 
@@ -3778,10 +3961,7 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 
        mod->soundfromcenter = true;
        mod->TraceBox = Mod_Q1BSP_TraceBox;
-       if (sv_gameplayfix_q1bsptracelinereportstexture.integer)
-               mod->TraceLine = Mod_Q1BSP_TraceLineAgainstSurfaces; // LordHavoc: use the surface-hitting version of TraceLine in all cases
-       else
-               mod->TraceLine = Mod_Q1BSP_TraceLine;
+       mod->TraceLine = Mod_Q1BSP_TraceLine;
        mod->TracePoint = Mod_Q1BSP_TracePoint;
        mod->PointSuperContents = Mod_Q1BSP_PointSuperContents;
        mod->TraceLineAgainstSurfaces = Mod_Q1BSP_TraceLineAgainstSurfaces;
@@ -3850,6 +4030,7 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        // check if the map supports transparent water rendering
        loadmodel->brush.supportwateralpha = Mod_Q1BSP_CheckWaterAlphaSupport();
 
+       // we don't need the compressed pvs data anymore
        if (mod->brushq1.data_compressedpvs)
                Mem_Free(mod->brushq1.data_compressedpvs);
        mod->brushq1.data_compressedpvs = NULL;
@@ -3950,6 +4131,9 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                // set node/leaf parents for this submodel
                Mod_Q1BSP_LoadNodes_RecursiveSetParent(mod->brush.data_nodes + mod->brushq1.hulls[0].firstclipnode, NULL);
 
+               // this has to occur after hull info has been set, as it uses Mod_Q1BSP_PointSuperContents
+               Mod_Q1BSP_AssignNoShadowSkySurfaces(mod);
+
                // make the model surface list (used by shadowing/lighting)
                mod->sortedmodelsurfaces = (int *)datapointer;datapointer += mod->nummodelsurfaces * sizeof(int);
                Mod_MakeSortedSurfaces(mod);
@@ -4064,442 +4248,979 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        Con_DPrintf("Stats for q1bsp model \"%s\": %i faces, %i nodes, %i leafs, %i visleafs, %i visleafportals, 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);
 }
 
-static void Mod_Q2BSP_LoadEntities(lump_t *l)
+int Mod_Q2BSP_SuperContentsFromNativeContents(int nativecontents)
 {
+       int supercontents = 0;
+       if (nativecontents & CONTENTSQ2_SOLID)
+               supercontents |= SUPERCONTENTS_SOLID;
+       if (nativecontents & CONTENTSQ2_WATER)
+               supercontents |= SUPERCONTENTS_WATER;
+       if (nativecontents & CONTENTSQ2_SLIME)
+               supercontents |= SUPERCONTENTS_SLIME;
+       if (nativecontents & CONTENTSQ2_LAVA)
+               supercontents |= SUPERCONTENTS_LAVA;
+       if (nativecontents & CONTENTSQ2_MONSTER)
+               supercontents |= SUPERCONTENTS_BODY;
+       if (nativecontents & CONTENTSQ2_DEADMONSTER)
+               supercontents |= SUPERCONTENTS_CORPSE;
+       if (nativecontents & CONTENTSQ2_PLAYERCLIP)
+               supercontents |= SUPERCONTENTS_PLAYERCLIP;
+       if (nativecontents & CONTENTSQ2_MONSTERCLIP)
+               supercontents |= SUPERCONTENTS_MONSTERCLIP;
+       if (!(nativecontents & CONTENTSQ2_TRANSLUCENT))
+               supercontents |= SUPERCONTENTS_OPAQUE;
+       return supercontents;
 }
 
-static void Mod_Q2BSP_LoadPlanes(lump_t *l)
+int Mod_Q2BSP_NativeContentsFromSuperContents(int supercontents)
+{
+       int nativecontents = 0;
+       if (supercontents & SUPERCONTENTS_SOLID)
+               nativecontents |= CONTENTSQ2_SOLID;
+       if (supercontents & SUPERCONTENTS_WATER)
+               nativecontents |= CONTENTSQ2_WATER;
+       if (supercontents & SUPERCONTENTS_SLIME)
+               nativecontents |= CONTENTSQ2_SLIME;
+       if (supercontents & SUPERCONTENTS_LAVA)
+               nativecontents |= CONTENTSQ2_LAVA;
+       if (supercontents & SUPERCONTENTS_BODY)
+               nativecontents |= CONTENTSQ2_MONSTER;
+       if (supercontents & SUPERCONTENTS_CORPSE)
+               nativecontents |= CONTENTSQ2_DEADMONSTER;
+       if (supercontents & SUPERCONTENTS_PLAYERCLIP)
+               nativecontents |= CONTENTSQ2_PLAYERCLIP;
+       if (supercontents & SUPERCONTENTS_MONSTERCLIP)
+               nativecontents |= CONTENTSQ2_MONSTERCLIP;
+       if (!(supercontents & SUPERCONTENTS_OPAQUE))
+               nativecontents |= CONTENTSQ2_TRANSLUCENT;
+       return nativecontents;
+}
+
+static void Mod_Q2BSP_LoadVisibility(sizebuf_t *sb)
 {
-/*
-       d_t *in;
-       m_t *out;
        int i, count;
+       loadmodel->brushq1.num_compressedpvs = 0;
+       loadmodel->brushq1.data_compressedpvs = NULL;
+       loadmodel->brush.num_pvsclusters = 0;
+       loadmodel->brush.num_pvsclusterbytes = 0;
+       loadmodel->brush.data_pvsclusters = NULL;
 
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadPlanes: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       if (!sb->cursize)
+               return;
 
-       loadmodel-> = out;
-       loadmodel->num = count;
-
-       for (i = 0;i < count;i++, in++, out++)
+       count = MSG_ReadLittleLong(sb);
+       loadmodel->brush.num_pvsclusters = count;
+       loadmodel->brush.num_pvsclusterbytes = (count+7)>>3;
+       loadmodel->brush.data_pvsclusters = (unsigned char *)Mem_Alloc(loadmodel->mempool, count*loadmodel->brush.num_pvsclusterbytes);
+       for (i = 0;i < count;i++)
        {
+               int pvsofs = MSG_ReadLittleLong(sb);
+               /*int phsofs = */MSG_ReadLittleLong(sb);
+               // decompress the vis data for this cluster
+               // (note this accesses the underlying data store of sb, which is kind of evil)
+               Mod_Q1BSP_DecompressVis(sb->data + pvsofs, sb->data + sb->cursize, loadmodel->brush.data_pvsclusters + i * loadmodel->brush.num_pvsclusterbytes, loadmodel->brush.data_pvsclusters + (i+1) * loadmodel->brush.num_pvsclusterbytes);
        }
-*/
+       // hush the loading error check later - we had to do random access on this lump, so we didn't read to the end
+       sb->readcount = sb->cursize;
 }
 
-static void Mod_Q2BSP_LoadVertices(lump_t *l)
+static void Mod_Q2BSP_LoadNodes(sizebuf_t *sb)
 {
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
+       int                     i, j, count, p, child[2];
+       mnode_t         *out;
+       int structsize = 28;
 
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadVertices: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       if (sb->cursize % structsize)
+               Host_Error("Mod_Q2BSP_LoadNodes: funny lump size in %s",loadmodel->name);
+       count = sb->cursize / structsize;
+       if (count == 0)
+               Host_Error("Mod_Q2BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
+       out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+       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++)
        {
+               p = MSG_ReadLittleLong(sb);
+               out->plane = loadmodel->brush.data_planes + p;
+               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 = (unsigned short)MSG_ReadLittleShort(sb);
+               out->numsurfaces = (unsigned short)MSG_ReadLittleShort(sb);
+               if (out->firstsurface + out->numsurfaces > (unsigned int)loadmodel->num_surfaces)
+               {
+                       Con_Printf("Mod_Q2BSP_LoadNodes: invalid surface index range %i+%i (file has only %i surfaces)\n", out->firstsurface, out->numsurfaces, loadmodel->num_surfaces);
+                       out->firstsurface = 0;
+                       out->numsurfaces = 0;
+               }
+               for (j=0 ; j<2 ; j++)
+               {
+                       p = child[j];
+                       if (p >= 0)
+                       {
+                               if (p < loadmodel->brush.num_nodes)
+                                       out->children[j] = loadmodel->brush.data_nodes + p;
+                               else
+                               {
+                                       Con_Printf("Mod_Q2BSP_LoadNodes: invalid node index %i (file has only %i nodes)\n", p, loadmodel->brush.num_nodes);
+                                       // map it to the solid leaf
+                                       out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
+                               }
+                       }
+                       else
+                       {
+                               // 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
+                               {
+                                       Con_Printf("Mod_Q2BSP_LoadNodes: invalid leaf index %i (file has only %i leafs)\n", p, loadmodel->brush.num_leafs);
+                                       // map it to the solid leaf
+                                       out->children[j] = (mnode_t *)loadmodel->brush.data_leafs;
+                               }
+                       }
+               }
        }
-*/
+
+       Mod_Q1BSP_LoadNodes_RecursiveSetParent(loadmodel->brush.data_nodes, NULL);      // sets nodes and leafs
 }
 
-static void Mod_Q2BSP_LoadVisibility(lump_t *l)
+static void Mod_Q2BSP_LoadTexinfo(sizebuf_t *sb)
 {
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
-
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadVisibility: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       mtexinfo_t *out;
+       int i, l, count;
+       int structsize = 76;
+       int maxtextures = 1024; // hardcoded limit of quake2 engine, so we may as well use it as an upper bound
+       char filename[MAX_QPATH];
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+       if (sb->cursize % structsize)
+               Host_Error("Mod_Q2BSP_LoadTexinfo: funny lump size in %s",loadmodel->name);
+       count = sb->cursize / structsize;
+       out = (mtexinfo_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       loadmodel->brushq1.texinfo = out;
+       loadmodel->brushq1.numtexinfo = count;
+       loadmodel->num_texturesperskin = 0;
+       loadmodel->data_textures = (texture_t*)Mem_Alloc(loadmodel->mempool, maxtextures * sizeof(texture_t));
 
-       for (i = 0;i < count;i++, in++, out++)
+       for (i = 0;i < count;i++, out++)
        {
+               int j, k;
+               for (k = 0;k < 2;k++)
+                       for (j = 0;j < 4;j++)
+                               out->vecs[k][j] = MSG_ReadLittleFloat(sb);
+
+               out->q2flags = MSG_ReadLittleLong(sb);
+               out->q2value = MSG_ReadLittleLong(sb);
+               MSG_ReadBytes(sb, 32, (unsigned char*)out->q2texture);
+               out->q2texture[31] = 0; // make absolutely sure it is terminated
+               out->q2nexttexinfo = MSG_ReadLittleLong(sb);
+
+               // find an existing match for the texture if possible
+               dpsnprintf(filename, sizeof(filename), "textures/%s.wal", out->q2texture);
+               for (j = 0;j < loadmodel->num_texturesperskin;j++)
+                       if (!strcmp(filename, loadmodel->data_textures[j].name)
+                        && out->q2flags == loadmodel->data_textures[j].q2flags
+                        && out->q2value == loadmodel->data_textures[j].q2value)
+                               break;
+               // if we don't find the texture, store the new texture
+               if (j == loadmodel->num_texturesperskin)
+               {
+                       if (loadmodel->num_texturesperskin < maxtextures)
+                       {
+                               texture_t *tx = loadmodel->data_textures + j;
+                               int q2flags = out->q2flags;
+                               unsigned char *walfile = NULL;
+                               fs_offset_t walfilesize = 0;
+                               Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, tx, filename, true, true, TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL);
+                               // now read the .wal file to get metadata (even if a .tga was overriding it, we still need the wal data)
+                               walfile = FS_LoadFile(filename, tempmempool, true, &walfilesize);
+                               if (walfile)
+                               {
+                                       int w, h;
+                                       LoadWAL_GetMetadata(walfile, (int)walfilesize, &w, &h, NULL, NULL, &tx->q2contents, NULL);
+                                       tx->width = w;
+                                       tx->height = h;
+                                       Mem_Free(walfile);
+                               }
+                               else
+                               {
+                                       tx->width = 16;
+                                       tx->height = 16;
+                               }
+                               tx->q2flags = out->q2flags;
+                               tx->q2value = out->q2value;
+                               // also modify the texture to have the correct contents and such based on flags
+                               // note that we create multiple texture_t structures if q2flags differs
+                               if (q2flags & Q2SURF_LIGHT)
+                               {
+                                       // doesn't mean anything to us
+                               }
+                               if (q2flags & Q2SURF_SLICK)
+                               {
+                                       // would be nice to support...
+                               }
+                               if (q2flags & Q2SURF_SKY)
+                               {
+                                       // sky is a rather specific thing
+                                       q2flags &= ~Q2SURF_NODRAW; // quake2 had a slightly different meaning than we have in mind here...
+                                       tx->basematerialflags = MATERIALFLAG_SKY;
+                                       tx->supercontents = SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP | SUPERCONTENTS_OPAQUE;
+                                       tx->surfaceflags = Q3SURFACEFLAG_SKY | Q3SURFACEFLAG_NOIMPACT | Q3SURFACEFLAG_NOMARKS | Q3SURFACEFLAG_NODLIGHT | Q3SURFACEFLAG_NOLIGHTMAP;
+                               }
+                               if (q2flags & Q2SURF_WARP)
+                               {
+                                       // we use a scroll instead of a warp
+                                       tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_FULLBRIGHT;
+                                       // if it's also transparent, we can enable the WATERSHADER
+                                       // but we do not set the WATERALPHA flag because we don't
+                                       // want to honor r_wateralpha in q2bsp
+                                       // (it would go against the artistic intent)
+                                       if (q2flags & (Q2SURF_TRANS33 | Q2SURF_TRANS66))
+                                               tx->basematerialflags |= MATERIALFLAG_WATERSHADER;
+                               }
+                               if (q2flags & Q2SURF_TRANS33)
+                               {
+                                       tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED;
+                                       tx->basealpha = 1.0f / 3.0f;
+                                       tx->supercontents &= ~SUPERCONTENTS_OPAQUE;
+                                       if (tx->q2contents & Q2CONTENTS_SOLID)
+                                               tx->q2contents = (tx->q2contents & ~Q2CONTENTS_SOLID) | Q2CONTENTS_WINDOW;
+                               }
+                               if (q2flags & Q2SURF_TRANS66)
+                               {
+                                       tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED;
+                                       tx->basealpha = 2.0f / 3.0f;
+                                       tx->supercontents &= ~SUPERCONTENTS_OPAQUE;
+                                       if (tx->q2contents & Q2CONTENTS_SOLID)
+                                               tx->q2contents = (tx->q2contents & ~Q2CONTENTS_SOLID) | Q2CONTENTS_WINDOW;
+                               }
+                               if ((q2flags & Q2SURF_FLOWING) && tx->materialshaderpass != NULL)
+                               {
+                                       tx->materialshaderpass->tcmods[0].tcmod = Q3TCMOD_SCROLL;
+                                       if (q2flags & Q2SURF_WARP)
+                                               tx->materialshaderpass->tcmods[0].parms[0] = -0.5f;
+                                       else
+                                               tx->materialshaderpass->tcmods[0].parms[0] = -1.6f;
+                                       tx->materialshaderpass->tcmods[0].parms[1] = 0.0f;
+                               }
+                               if (q2flags & Q2SURF_ALPHATEST)
+                               {
+                                       // KMQUAKE2 and other modded engines added this flag for lit alpha tested surfaces
+                                       tx->basematerialflags |= MATERIALFLAG_ALPHATEST | MATERIALFLAG_NOSHADOW;
+                               }
+                               else if (q2flags & (Q2SURF_TRANS33 | Q2SURF_TRANS66 | Q2SURF_WARP))
+                               {
+                                       if (!mod_q2bsp_littransparentsurfaces.integer)
+                                               tx->basematerialflags |= MATERIALFLAG_FULLBRIGHT;
+                               }
+                               if (q2flags & Q2SURF_NODRAW)
+                               {
+                                       tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
+                               }
+                               if (tx->q2contents & (Q2CONTENTS_TRANSLUCENT | Q2CONTENTS_MONSTERCLIP | Q2CONTENTS_PLAYERCLIP))
+                                       tx->q2contents |= Q2CONTENTS_DETAIL;
+                               if (!(tx->q2contents & (Q2CONTENTS_SOLID | Q2CONTENTS_WINDOW | Q2CONTENTS_AUX | Q2CONTENTS_LAVA | Q2CONTENTS_SLIME | Q2CONTENTS_WATER | Q2CONTENTS_MIST | Q2CONTENTS_PLAYERCLIP | Q2CONTENTS_MONSTERCLIP | Q2CONTENTS_MIST)))
+                                       tx->q2contents |= Q2CONTENTS_SOLID;
+                               if (tx->q2flags & (Q2SURF_HINT | Q2SURF_SKIP))
+                                       tx->q2contents = 0;
+                               tx->supercontents = Mod_Q2BSP_SuperContentsFromNativeContents(tx->q2contents);
+                               // set the current values to the base values
+                               tx->currentframe = tx;
+                               tx->currentskinframe = tx->materialshaderpass != NULL ? tx->materialshaderpass->skinframes[0] : NULL;
+                               tx->currentmaterialflags = tx->basematerialflags;
+                               loadmodel->num_texturesperskin++;
+                               loadmodel->num_textures = loadmodel->num_texturesperskin;
+                       }
+                       else
+                       {
+                               Con_Printf("Mod_Q2BSP_LoadTexinfo: max textures reached (%i)\n", maxtextures);
+                               j = 0; // use first texture and give up
+                       }
+               }
+               // store the index we found for this texture
+               out->textureindex = j;
        }
-*/
-}
 
-static void Mod_Q2BSP_LoadNodes(lump_t *l)
-{
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
+       // realloc the textures array now that we know how many we actually need
+       loadmodel->data_textures = (texture_t*)Mem_Realloc(loadmodel->mempool, loadmodel->data_textures, loadmodel->num_texturesperskin * sizeof(texture_t));
 
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadNodes: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       // now assemble the texture chains
+       // if we encounter the textures out of order, the later ones won't mark the earlier ones in a sequence, so the earlier 
+       for (i = 0, out = loadmodel->brushq1.texinfo;i < count;i++, out++)
+       {
+               int j, k;
+               texture_t *t = loadmodel->data_textures + out->textureindex;
+               t->currentframe = t; // fix the reallocated pointer
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+               // if this is not animated, skip it
+               // if this is already processed, skip it (part of an existing sequence)
+               if (out->q2nexttexinfo == 0 || t->animated)
+                       continue;
 
-       for (i = 0;i < count;i++, in++, out++)
-       {
+               // store the array of frames to use
+               t->animated = 2; // q2bsp animation
+               t->anim_total[0] = 0;
+               t->anim_total[1] = 0;
+               // gather up to 10 frames (we don't support more)
+               for (j = i;j >= 0 && t->anim_total[0] < (int)(sizeof(t->anim_frames[0])/sizeof(t->anim_frames[0][0]));j = loadmodel->brushq1.texinfo[j].q2nexttexinfo)
+               {
+                       // detect looping and stop there
+                       if (t->anim_total[0] && loadmodel->brushq1.texinfo[j].textureindex == out->textureindex)
+                               break;
+                       t->anim_frames[0][t->anim_total[0]++] = &loadmodel->data_textures[loadmodel->brushq1.texinfo[j].textureindex];
+               }
+               // we could look for the +a sequence here if this is the +0 sequence,
+               // but it seems that quake2 did not implement that (even though the
+               // files exist in the baseq2 content)
+
+               // write the frame sequence to all the textures involved (just like
+               // in the q1bsp loader)
+               //
+               // note that this can overwrite the rest of the sequence - so if the
+               // start of a sequence is found later than the other parts of the
+               // sequence, it will go back and rewrite them correctly.
+               for (k = 0;k < t->anim_total[0];k++)
+               {
+                       texture_t *txk = t->anim_frames[0][k];
+                       txk->animated = t->animated;
+                       txk->anim_total[0] = t->anim_total[0];
+                       for (l = 0;l < t->anim_total[0];l++)
+                               txk->anim_frames[0][l] = t->anim_frames[0][l];
+               }
        }
-*/
 }
 
-static void Mod_Q2BSP_LoadTexInfo(lump_t *l)
+static void Mod_Q2BSP_LoadLighting(sizebuf_t *sb)
 {
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
+       // LordHavoc: this fits exactly the same format that we use in .lit files
+       loadmodel->brushq1.lightdata = (unsigned char *)Mem_Alloc(loadmodel->mempool, sb->cursize);
+       MSG_ReadBytes(sb, sb->cursize, loadmodel->brushq1.lightdata);
+}
 
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadTexInfo: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+static void Mod_Q2BSP_LoadLeafs(sizebuf_t *sb)
+{
+       mleaf_t *out;
+       int i, j, count, firstmarksurface, nummarksurfaces, firstmarkbrush, nummarkbrushes;
+       int structsize = 28;
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+       if (sb->cursize % structsize)
+               Host_Error("Mod_Q2BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
+       count = sb->cursize / structsize;
+       out = (mleaf_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
 
-       for (i = 0;i < count;i++, in++, out++)
+       loadmodel->brush.data_leafs = out;
+       loadmodel->brush.num_leafs = count;
+
+       // FIXME: this function could really benefit from some error checking
+       for ( i=0 ; i<count ; i++, out++)
        {
+               out->contents = MSG_ReadLittleLong(sb);
+               out->clusterindex = MSG_ReadLittleShort(sb);
+               out->areaindex = MSG_ReadLittleShort(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);
+       
+               firstmarksurface = (unsigned short)MSG_ReadLittleShort(sb);
+               nummarksurfaces  = (unsigned short)MSG_ReadLittleShort(sb);
+               firstmarkbrush = (unsigned short)MSG_ReadLittleShort(sb);
+               nummarkbrushes  = (unsigned short)MSG_ReadLittleShort(sb);
+
+               for (j = 0;j < 4;j++)
+                       out->ambient_sound_level[j] = 0;
+
+               if (out->clusterindex >= loadmodel->brush.num_pvsclusters)
+               {
+                       Con_Print("Mod_Q2BSP_LoadLeafs: invalid clusterindex\n");
+                       out->clusterindex = -1;
+               }
+
+               if (firstmarksurface >= 0 && firstmarksurface + nummarksurfaces <= loadmodel->brush.num_leafsurfaces)
+               {
+                       out->firstleafsurface = loadmodel->brush.data_leafsurfaces + firstmarksurface;
+                       out->numleafsurfaces = nummarksurfaces;
+               }
+               else
+               {
+                       Con_Printf("Mod_Q2BSP_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;
+               }
+
+               if (firstmarkbrush >= 0 && firstmarkbrush + nummarkbrushes <= loadmodel->brush.num_leafbrushes)
+               {
+                       out->firstleafbrush = loadmodel->brush.data_leafbrushes + firstmarkbrush;
+                       out->numleafbrushes = nummarkbrushes;
+               }
+               else
+               {
+                       Con_Printf("Mod_Q2BSP_LoadLeafs: invalid leafbrush range %i:%i outside range %i:%i\n", firstmarkbrush, firstmarkbrush+nummarkbrushes, 0, loadmodel->brush.num_leafbrushes);
+                       out->firstleafbrush = NULL;
+                       out->numleafbrushes = 0;
+               }
        }
-*/
 }
 
-static void Mod_Q2BSP_LoadFaces(lump_t *l)
+static void Mod_Q2BSP_LoadLeafBrushes(sizebuf_t *sb)
 {
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
-
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadFaces: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       int i, j;
+       int structsize = 2;
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+       if (sb->cursize % structsize)
+               Host_Error("Mod_Q2BSP_LoadLeafBrushes: funny lump size in %s",loadmodel->name);
+       loadmodel->brush.num_leafbrushes = sb->cursize / structsize;
+       loadmodel->brush.data_leafbrushes = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafbrushes * sizeof(int));
 
-       for (i = 0;i < count;i++, in++, out++)
+       for (i = 0;i < loadmodel->brush.num_leafbrushes;i++)
        {
+               j = (unsigned short) MSG_ReadLittleShort(sb);
+               if (j >= loadmodel->brush.num_brushes)
+                       Host_Error("Mod_Q1BSP_LoadLeafBrushes: bad brush number");
+               loadmodel->brush.data_leafbrushes[i] = j;
        }
-*/
 }
 
-static void Mod_Q2BSP_LoadLighting(lump_t *l)
+static void Mod_Q2BSP_LoadBrushSides(sizebuf_t *sb)
 {
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
+       q3mbrushside_t *out;
+       int i, n, count;
+       int structsize = 4;
 
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadLighting: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       if (sb->cursize % structsize)
+               Host_Error("Mod_Q2BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
+       count = sb->cursize / structsize;
+       out = (q3mbrushside_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+       loadmodel->brush.data_brushsides = out;
+       loadmodel->brush.num_brushsides = count;
 
-       for (i = 0;i < count;i++, in++, out++)
+       for (i = 0;i < count;i++, out++)
        {
+               n = (unsigned short)MSG_ReadLittleShort(sb);
+               if (n < 0 || n >= loadmodel->brush.num_planes)
+                       Host_Error("Mod_Q2BSP_LoadBrushSides: invalid planeindex %i (%i planes)", n, loadmodel->brush.num_planes);
+               out->plane = loadmodel->brush.data_planes + n;
+               n = MSG_ReadLittleShort(sb);
+               if (n >= 0)
+               {
+                       if (n >= loadmodel->brushq1.numtexinfo)
+                               Host_Error("Mod_Q2BSP_LoadBrushSides: invalid texinfo index %i (%i texinfos)", n, loadmodel->brushq1.numtexinfo);
+                       out->texture = loadmodel->data_textures + loadmodel->brushq1.texinfo[n].textureindex;
+               }
+               else
+               {
+                       //Con_Printf("Mod_Q2BSP_LoadBrushSides: brushside %i has texinfo index %i < 0, changing to generic texture!\n", i, n);
+                       out->texture = &mod_q1bsp_texture_solid;
+               }
        }
-*/
 }
 
-static void Mod_Q2BSP_LoadLeafs(lump_t *l)
+static void Mod_Q2BSP_LoadBrushes(sizebuf_t *sb)
 {
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
+       q3mbrush_t *out;
+       int i, j, firstside, numsides, contents, count, maxplanes, q3surfaceflags, supercontents;
+       colplanef_t *planes;
+       int structsize = 12;
+       qboolean brushmissingtextures;
+       int numbrushesmissingtextures = 0;
+       int numcreatedtextures = 0;
 
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadLeafs: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       if (sb->cursize % structsize)
+               Host_Error("Mod_Q2BSP_LoadBrushes: funny lump size in %s",loadmodel->name);
+       count = sb->cursize / structsize;
+       out = (q3mbrush_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+       loadmodel->brush.data_brushes = out;
+       loadmodel->brush.num_brushes = count;
 
-       for (i = 0;i < count;i++, in++, out++)
+       maxplanes = 0;
+       planes = NULL;
+
+       for (i = 0; i < count; i++, out++)
        {
+               firstside = MSG_ReadLittleLong(sb);
+               numsides = MSG_ReadLittleLong(sb);
+               contents = MSG_ReadLittleLong(sb);
+               if (firstside < 0 || firstside + numsides > loadmodel->brush.num_brushsides)
+                       Host_Error("Mod_Q3BSP_LoadBrushes: invalid brushside range %i : %i (%i brushsides)", firstside, firstside + numsides, loadmodel->brush.num_brushsides);
+
+               out->firstbrushside = loadmodel->brush.data_brushsides + firstside;
+               out->numbrushsides = numsides;
+               // convert the contents to our values
+               supercontents = Mod_Q2BSP_SuperContentsFromNativeContents(contents);
+
+               // problem: q2bsp brushes have contents but not a texture
+               // problem: q2bsp brushsides *may* have a texture or may not
+               // problem: all brushsides and brushes must have a texture for trace_hittexture functionality to work, and the collision code is engineered around this assumption
+               // solution: nasty hacks
+               brushmissingtextures = false;
+               out->texture = NULL;
+               for (j = 0; j < out->numbrushsides; j++)
+               {
+                       if (out->firstbrushside[j].texture == &mod_q1bsp_texture_solid)
+                               brushmissingtextures = true;
+                       else
+                       {
+                               // if we can find a matching texture on a brush side we can use it instead of creating one
+                               if (out->firstbrushside[j].texture->supercontents == supercontents)
+                                       out->texture = out->firstbrushside[j].texture;
+                       }
+               }
+               if (brushmissingtextures || out->texture == NULL)
+               {
+                       numbrushesmissingtextures++;
+                       // if we didn't find any appropriate texture (matching contents), we'll have to create one
+                       // we could search earlier ones for a matching one but that can be slow
+                       if (out->texture == NULL)
+                       {
+                               texture_t *validtexture;
+                               validtexture = (texture_t *)Mem_Alloc(loadmodel->mempool, sizeof(texture_t));
+                               dpsnprintf(validtexture->name, sizeof(validtexture->name), "brushcollision%i", numcreatedtextures);
+                               validtexture->surfaceflags = 0;
+                               validtexture->supercontents = supercontents;
+                               numcreatedtextures++;
+                               out->texture = validtexture;
+                       }
+                       // out->texture now contains a texture with appropriate contents, copy onto any missing sides
+                       for (j = 0; j < out->numbrushsides; j++)
+                               if (out->firstbrushside[j].texture == &mod_q1bsp_texture_solid)
+                                       out->firstbrushside[j].texture = out->texture;
+               }
+
+               // make a colbrush from the brush
+               q3surfaceflags = 0;
+               // make a list of mplane_t structs to construct a colbrush from
+               if (maxplanes < out->numbrushsides)
+               {
+                       maxplanes = out->numbrushsides;
+                       if (planes)
+                               Mem_Free(planes);
+                       planes = (colplanef_t *)Mem_Alloc(tempmempool, sizeof(colplanef_t) * maxplanes);
+               }
+               for (j = 0;j < out->numbrushsides;j++)
+               {
+                       VectorCopy(out->firstbrushside[j].plane->normal, planes[j].normal);
+                       planes[j].dist = out->firstbrushside[j].plane->dist;
+                       planes[j].q3surfaceflags = out->firstbrushside[j].texture->surfaceflags;
+                       planes[j].texture = out->firstbrushside[j].texture;
+                       q3surfaceflags |= planes[j].q3surfaceflags;
+               }
+               out->colbrushf = Collision_NewBrushFromPlanes(loadmodel->mempool, out->numbrushsides, planes, out->texture->supercontents, q3surfaceflags, out->texture, true);
+
+               // this whole loop can take a while (e.g. on redstarrepublic4)
+               CL_KeepaliveMessage(false);
        }
-*/
+       if (planes)
+               Mem_Free(planes);
+       if (numcreatedtextures)
+               Con_DPrintf("Mod_Q2BSP_LoadBrushes: %i brushes own sides that lack textures or have differing contents from the brush, %i textures have been created to describe these contents.\n", numbrushesmissingtextures, numcreatedtextures);
 }
 
-static void Mod_Q2BSP_LoadLeafFaces(lump_t *l)
+static void Mod_Q2BSP_LoadPOP(sizebuf_t *sb)
 {
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
-
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadLeafFaces: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       // this is probably a "proof of purchase" lump of some sort, it seems to be 0 size in most bsp files (but not q2dm1.bsp for instance)
+       sb->readcount = sb->cursize;
+}
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+static void Mod_Q2BSP_LoadAreas(sizebuf_t *sb)
+{
+       // we currently don't use areas, they represent closable doors as vis blockers
+       sb->readcount = sb->cursize;
+}
 
-       for (i = 0;i < count;i++, in++, out++)
-       {
-       }
-*/
+static void Mod_Q2BSP_LoadAreaPortals(sizebuf_t *sb)
+{
+       // we currently don't use areas, they represent closable doors as vis blockers
+       sb->readcount = sb->cursize;
 }
 
-static void Mod_Q2BSP_LoadLeafBrushes(lump_t *l)
+static void Mod_Q2BSP_LoadSubmodels(sizebuf_t *sb)
 {
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
+       mmodel_t        *out;
+       int                     i, count;
+       int                     structsize = 48;
 
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadLeafBrushes: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       if (sb->cursize % structsize)
+               Host_Error ("Mod_Q2BSP_LoadSubmodels: funny lump size in %s", loadmodel->name);
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+       count = sb->cursize / structsize;
+       out = (mmodel_t *)Mem_Alloc (loadmodel->mempool, count*sizeof(*out));
 
-       for (i = 0;i < count;i++, in++, out++)
+       loadmodel->brushq1.submodels = out;
+       loadmodel->brush.numsubmodels = count;
+
+       // this is identical to the q1 submodel structure except for having 1 hull
+       for (i = 0; i < count; i++, out++)
        {
+               // spread out the mins / maxs by a pixel
+               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);
+               out->headnode[0] = MSG_ReadLittleLong(sb);
+               out->firstface = MSG_ReadLittleLong(sb);
+               out->numfaces  = MSG_ReadLittleLong(sb);
        }
-*/
 }
 
-static void Mod_Q2BSP_LoadEdges(lump_t *l)
+static void Mod_Q2BSP_FindSubmodelBrushRange_r(dp_model_t *mod, mnode_t *node, int *first, int *last)
 {
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
-
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadEdges: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
-
-       loadmodel-> = out;
-       loadmodel->num = count;
-
-       for (i = 0;i < count;i++, in++, out++)
+       int i;
+       mleaf_t *leaf;
+       while (node->plane)
        {
+               Mod_Q2BSP_FindSubmodelBrushRange_r(mod, node->children[0], first, last);
+               node = node->children[1];
+       }
+       leaf = (mleaf_t*)node;
+       for (i = 0;i < leaf->numleafbrushes;i++)
+       {
+               int brushnum = leaf->firstleafbrush[i];
+               if (*first > brushnum)
+                       *first = brushnum;
+               if (*last < brushnum)
+                       *last = brushnum;
        }
-*/
 }
 
-static void Mod_Q2BSP_LoadSurfEdges(lump_t *l)
+static void Mod_Q2BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
+       int i, j, k;
+       sizebuf_t lumpsb[Q2HEADER_LUMPS];
+       mmodel_t *bm;
+       float dist, modelyawradius, modelradius;
+       msurface_t *surface;
+       int totalstylesurfaces, totalstyles, stylecounts[256], remapstyles[256];
+       model_brush_lightstyleinfo_t styleinfo[256];
+       unsigned char *datapointer;
+       sizebuf_t sb;
 
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadSurfEdges: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       MSG_InitReadBuffer(&sb, (unsigned char *)buffer, (unsigned char *)bufferend - (unsigned char *)buffer);
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+       mod->type = mod_brushq2;
 
-       for (i = 0;i < count;i++, in++, out++)
+       mod->brush.ishlbsp = false;
+       mod->brush.isbsp2rmqe = false;
+       mod->brush.isbsp2 = false;
+       mod->brush.isq2bsp = true; // q1bsp loaders mostly work but we need a few tweaks
+       mod->brush.isq3bsp = false;
+       mod->brush.skymasking = true;
+       mod->modeldatatypestring = "Q2BSP";
+
+       i = MSG_ReadLittleLong(&sb);
+       if (i != Q2BSPMAGIC)
+               Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
+
+       i = MSG_ReadLittleLong(&sb);
+       if (i != Q2BSPVERSION)
+               Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
+
+// read lumps
+       for (i = 0; i < Q2HEADER_LUMPS; i++)
        {
+               int offset = MSG_ReadLittleLong(&sb);
+               int size = MSG_ReadLittleLong(&sb);
+               if (offset < 0 || offset + size > sb.cursize)
+                       Host_Error("Mod_Q2BSP_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);
        }
-*/
-}
 
-static void Mod_Q2BSP_LoadBrushes(lump_t *l)
-{
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
-
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadBrushes: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       mod->soundfromcenter = true;
+       mod->TracePoint = Mod_CollisionBIH_TracePoint;
+       mod->TraceLine = Mod_CollisionBIH_TraceLine;
+       mod->TraceBox = Mod_CollisionBIH_TraceBox;
+       mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
+       mod->PointSuperContents = Mod_CollisionBIH_PointSuperContents;
+       mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
+       mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
+       mod->brush.SuperContentsFromNativeContents = Mod_Q2BSP_SuperContentsFromNativeContents;
+       mod->brush.NativeContentsFromSuperContents = Mod_Q2BSP_NativeContentsFromSuperContents;
+       mod->brush.GetPVS = Mod_Q1BSP_GetPVS;
+       mod->brush.FatPVS = Mod_Q1BSP_FatPVS;
+       mod->brush.BoxTouchingPVS = Mod_Q1BSP_BoxTouchingPVS;
+       mod->brush.BoxTouchingLeafPVS = Mod_Q1BSP_BoxTouchingLeafPVS;
+       mod->brush.BoxTouchingVisibleLeafs = Mod_Q1BSP_BoxTouchingVisibleLeafs;
+       mod->brush.FindBoxClusters = Mod_Q1BSP_FindBoxClusters;
+       mod->brush.LightPoint = Mod_Q1BSP_LightPoint;
+       mod->brush.FindNonSolidLocation = Mod_Q1BSP_FindNonSolidLocation;
+       mod->brush.AmbientSoundLevelsForPoint = NULL;
+       mod->brush.RoundUpToHullSize = NULL;
+       mod->brush.PointInLeaf = Mod_Q1BSP_PointInLeaf;
+       mod->Draw = R_Q1BSP_Draw;
+       mod->DrawDepth = R_Q1BSP_DrawDepth;
+       mod->DrawDebug = R_Q1BSP_DrawDebug;
+       mod->DrawPrepass = R_Q1BSP_DrawPrepass;
+       mod->GetLightInfo = R_Q1BSP_GetLightInfo;
+       mod->CompileShadowMap = R_Q1BSP_CompileShadowMap;
+       mod->DrawShadowMap = R_Q1BSP_DrawShadowMap;
+       mod->CompileShadowVolume = R_Q1BSP_CompileShadowVolume;
+       mod->DrawShadowVolume = R_Q1BSP_DrawShadowVolume;
+       mod->DrawLight = R_Q1BSP_DrawLight;
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+// load into heap
 
-       for (i = 0;i < count;i++, in++, out++)
+       mod->brush.qw_md4sum = 0;
+       mod->brush.qw_md4sum2 = 0;
+       for (i = 0;i < Q2HEADER_LUMPS;i++)
        {
+               int temp;
+               if (i == Q2LUMP_ENTITIES)
+                       continue;
+               temp = Com_BlockChecksum(lumpsb[i].data, lumpsb[i].cursize);
+               mod->brush.qw_md4sum ^= LittleLong(temp);
+               if (i == Q2LUMP_VISIBILITY || i == Q2LUMP_LEAFS || i == Q2LUMP_NODES)
+                       continue;
+               mod->brush.qw_md4sum2 ^= LittleLong(temp);
        }
-*/
-}
 
-static void Mod_Q2BSP_LoadBrushSides(lump_t *l)
-{
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
+       // many of these functions are identical to Q1 loaders, so we use those where possible
+       Mod_Q1BSP_LoadEntities(&lumpsb[Q2LUMP_ENTITIES]);
+       Mod_Q1BSP_LoadVertexes(&lumpsb[Q2LUMP_VERTEXES]);
+       Mod_Q1BSP_LoadEdges(&lumpsb[Q2LUMP_EDGES]);
+       Mod_Q1BSP_LoadSurfedges(&lumpsb[Q2LUMP_SURFEDGES]);
+       Mod_Q2BSP_LoadLighting(&lumpsb[Q2LUMP_LIGHTING]);
+       Mod_Q1BSP_LoadPlanes(&lumpsb[Q2LUMP_PLANES]);
+       Mod_Q2BSP_LoadTexinfo(&lumpsb[Q2LUMP_TEXINFO]);
+       Mod_Q2BSP_LoadBrushSides(&lumpsb[Q2LUMP_BRUSHSIDES]);
+       Mod_Q2BSP_LoadBrushes(&lumpsb[Q2LUMP_BRUSHES]);
+       Mod_Q1BSP_LoadFaces(&lumpsb[Q2LUMP_FACES]);
+       Mod_Q1BSP_LoadLeaffaces(&lumpsb[Q2LUMP_LEAFFACES]);
+       Mod_Q2BSP_LoadLeafBrushes(&lumpsb[Q2LUMP_LEAFBRUSHES]);
+       Mod_Q2BSP_LoadVisibility(&lumpsb[Q2LUMP_VISIBILITY]);
+       Mod_Q2BSP_LoadPOP(&lumpsb[Q2LUMP_POP]);
+       Mod_Q2BSP_LoadAreas(&lumpsb[Q2LUMP_AREAS]);
+       Mod_Q2BSP_LoadAreaPortals(&lumpsb[Q2LUMP_AREAPORTALS]);
+       Mod_Q2BSP_LoadLeafs(&lumpsb[Q2LUMP_LEAFS]);
+       Mod_Q2BSP_LoadNodes(&lumpsb[Q2LUMP_NODES]);
+       Mod_Q2BSP_LoadSubmodels(&lumpsb[Q2LUMP_MODELS]);
+
+       for (i = 0; i < Q2HEADER_LUMPS; i++)
+               if (lumpsb[i].readcount != lumpsb[i].cursize)
+                       Host_Error("Lump %i incorrectly loaded (readcount %i, size %i)\n", i, lumpsb[i].readcount, lumpsb[i].cursize);
 
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadBrushSides: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       // we don't actually set MATERIALFLAG_WATERALPHA on anything, so this
+       // doesn't enable the cvar, just indicates that transparent water is OK
+       loadmodel->brush.supportwateralpha = true;
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+       // we don't need the compressed pvs data anymore
+       if (mod->brushq1.data_compressedpvs)
+               Mem_Free(mod->brushq1.data_compressedpvs);
+       mod->brushq1.data_compressedpvs = NULL;
+       mod->brushq1.num_compressedpvs = 0;
 
-       for (i = 0;i < count;i++, in++, out++)
-       {
-       }
-*/
-}
+       // the MakePortals code works fine on the q2bsp data as well
+       if (mod_bsp_portalize.integer)
+               Mod_Q1BSP_MakePortals();
 
-static void Mod_Q2BSP_LoadAreas(lump_t *l)
-{
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
+       mod->numframes = 0;             // q2bsp animations are kind of special, frame is unbounded...
+       mod->numskins = 1;
 
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadAreas: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+       // make a single combined shadow mesh to allow optimized shadow volume creation
+       Mod_Q1BSP_CreateShadowMesh(loadmodel);
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+       if (loadmodel->brush.numsubmodels)
+               loadmodel->brush.submodels = (dp_model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
 
-       for (i = 0;i < count;i++, in++, out++)
+       totalstylesurfaces = 0;
+       totalstyles = 0;
+       for (i = 0;i < mod->brush.numsubmodels;i++)
        {
+               memset(stylecounts, 0, sizeof(stylecounts));
+               for (k = 0;k < mod->brushq1.submodels[i].numfaces;k++)
+               {
+                       surface = mod->data_surfaces + mod->brushq1.submodels[i].firstface + k;
+                       for (j = 0;j < MAXLIGHTMAPS;j++)
+                               stylecounts[surface->lightmapinfo->styles[j]]++;
+               }
+               for (k = 0;k < 255;k++)
+               {
+                       totalstyles++;
+                       if (stylecounts[k])
+                               totalstylesurfaces += stylecounts[k];
+               }
        }
-*/
-}
-
-static void Mod_Q2BSP_LoadAreaPortals(lump_t *l)
-{
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
-
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadAreaPortals: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
-
-       loadmodel-> = out;
-       loadmodel->num = count;
-
-       for (i = 0;i < count;i++, in++, out++)
+       datapointer = (unsigned char *)Mem_Alloc(mod->mempool, mod->num_surfaces * sizeof(int) + totalstyles * sizeof(model_brush_lightstyleinfo_t) + totalstylesurfaces * sizeof(int *));
+       // set up the world model, then on each submodel copy from the world model
+       // and set up the submodel with the respective model info.
+       mod = loadmodel;
+       for (i = 0;i < loadmodel->brush.numsubmodels;i++)
        {
-       }
-*/
-}
+               mnode_t *rootnode = NULL;
+               int firstbrush = loadmodel->brush.num_brushes, lastbrush = 0;
+               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;
 
-static void Mod_Q2BSP_LoadModels(lump_t *l)
-{
-/*
-       d_t *in;
-       m_t *out;
-       int i, count;
+               bm = &mod->brushq1.submodels[i];
 
-       in = (void *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q2BSP_LoadModels: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
-       out = Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
+               // we store the headnode (there's only one in Q2BSP) as if it were the first hull
+               mod->brushq1.hulls[0].firstclipnode = bm->headnode[0];
 
-       loadmodel-> = out;
-       loadmodel->num = count;
+               mod->firstmodelsurface = bm->firstface;
+               mod->nummodelsurfaces = bm->numfaces;
 
-       for (i = 0;i < count;i++, in++, out++)
-       {
-       }
-*/
-}
+               // set node/leaf parents for this submodel
+               // note: if the root of this submodel is a leaf (headnode[0] < 0) then there is nothing to do...
+               // (this happens in base3.bsp)
+               if (bm->headnode[0] >= 0)
+                       rootnode = mod->brush.data_nodes + bm->headnode[0];
+               else
+                       rootnode = (mnode_t*)(mod->brush.data_leafs + -1 - bm->headnode[0]);
+               Mod_Q1BSP_LoadNodes_RecursiveSetParent(rootnode, NULL);
 
-static void Mod_Q2BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
-{
-       int i;
-       q2dheader_t *header;
+               // make the model surface list (used by shadowing/lighting)
+               mod->sortedmodelsurfaces = (int *)datapointer;datapointer += mod->nummodelsurfaces * sizeof(int);
+               Mod_Q2BSP_FindSubmodelBrushRange_r(mod, rootnode, &firstbrush, &lastbrush);
+               if (firstbrush <= lastbrush)
+               {
+                       mod->firstmodelbrush = firstbrush;
+                       mod->nummodelbrushes = lastbrush + 1 - firstbrush;
+               }
+               else
+               {
+                       mod->firstmodelbrush = 0;
+                       mod->nummodelbrushes = 0;
+               }
+               Mod_MakeSortedSurfaces(mod);
 
-       Host_Error("Mod_Q2BSP_Load: not yet implemented");
+               VectorCopy(bm->mins, mod->normalmins);
+               VectorCopy(bm->maxs, mod->normalmaxs);
+               dist = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
+               modelyawradius = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
+               modelyawradius = dist*dist+modelyawradius*modelyawradius;
+               modelradius = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
+               modelradius = modelyawradius + modelradius * modelradius;
+               modelyawradius = sqrt(modelyawradius);
+               modelradius = sqrt(modelradius);
+               mod->yawmins[0] = mod->yawmins[1] = -modelyawradius;
+               mod->yawmins[2] = mod->normalmins[2];
+               mod->yawmaxs[0] = mod->yawmaxs[1] =  modelyawradius;
+               mod->yawmaxs[2] = mod->normalmaxs[2];
+               mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
+               mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] =  modelradius;
+               mod->radius = modelradius;
+               mod->radius2 = modelradius * modelradius;
 
-       mod->modeldatatypestring = "Q2BSP";
+               // this gets altered below if sky or water is used
+               mod->DrawSky = NULL;
+               mod->DrawAddWaterPlanes = NULL;
 
-       mod->type = mod_brushq2;
+               // scan surfaces for sky and water and flag the submodel as possessing these features or not
+               // build lightstyle lists for quick marking of dirty lightmaps when lightstyles flicker
+               if (mod->nummodelsurfaces)
+               {
+                       for (j = 0, surface = &mod->data_surfaces[mod->firstmodelsurface];j < mod->nummodelsurfaces;j++, surface++)
+                               if (surface->texture->basematerialflags & MATERIALFLAG_SKY)
+                                       break;
+                       if (j < mod->nummodelsurfaces)
+                               mod->DrawSky = R_Q1BSP_DrawSky;
 
-       header = (q2dheader_t *)buffer;
+                       for (j = 0, surface = &mod->data_surfaces[mod->firstmodelsurface];j < mod->nummodelsurfaces;j++, surface++)
+                               if (surface->texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA))
+                                       break;
+                       if (j < mod->nummodelsurfaces)
+                               mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
 
-       i = LittleLong(header->version);
-       if (i != Q2BSPVERSION)
-               Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
+                       // build lightstyle update chains
+                       // (used to rapidly mark lightmapupdateflags on many surfaces
+                       // when d_lightstylevalue changes)
+                       memset(stylecounts, 0, sizeof(stylecounts));
+                       for (k = 0;k < mod->nummodelsurfaces;k++)
+                       {
+                               surface = mod->data_surfaces + mod->firstmodelsurface + k;
+                               for (j = 0;j < MAXLIGHTMAPS;j++)
+                                       stylecounts[surface->lightmapinfo->styles[j]]++;
+                       }
+                       mod->brushq1.num_lightstyles = 0;
+                       for (k = 0;k < 255;k++)
+                       {
+                               if (stylecounts[k])
+                               {
+                                       styleinfo[mod->brushq1.num_lightstyles].style = k;
+                                       styleinfo[mod->brushq1.num_lightstyles].value = 0;
+                                       styleinfo[mod->brushq1.num_lightstyles].numsurfaces = 0;
+                                       styleinfo[mod->brushq1.num_lightstyles].surfacelist = (int *)datapointer;datapointer += stylecounts[k] * sizeof(int);
+                                       remapstyles[k] = mod->brushq1.num_lightstyles;
+                                       mod->brushq1.num_lightstyles++;
+                               }
+                       }
+                       for (k = 0;k < mod->nummodelsurfaces;k++)
+                       {
+                               surface = mod->data_surfaces + mod->firstmodelsurface + k;
+                               for (j = 0;j < MAXLIGHTMAPS;j++)
+                               {
+                                       if (surface->lightmapinfo->styles[j] != 255)
+                                       {
+                                               int r = remapstyles[surface->lightmapinfo->styles[j]];
+                                               styleinfo[r].surfacelist[styleinfo[r].numsurfaces++] = mod->firstmodelsurface + k;
+                                       }
+                               }
+                       }
+                       mod->brushq1.data_lightstyleinfo = (model_brush_lightstyleinfo_t *)datapointer;datapointer += mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t);
+                       memcpy(mod->brushq1.data_lightstyleinfo, styleinfo, mod->brushq1.num_lightstyles * sizeof(model_brush_lightstyleinfo_t));
+               }
+               else
+               {
+                       Con_Printf("warning: empty submodel *%i in %s\n", i+1, loadmodel->name);
+               }
+               //mod->brushq1.num_visleafs = bm->visleafs;
 
-       mod_base = (unsigned char *)header;
+               // build a Bounding Interval Hierarchy for culling triangles in light rendering
+               Mod_MakeCollisionBIH(mod, false, &mod->collision_bih);
 
-       // swap all the lumps
-       for (i = 0;i < (int) sizeof(*header) / 4;i++)
-               ((int *)header)[i] = LittleLong(((int *)header)[i]);
+               // build a Bounding Interval Hierarchy for culling brushes in collision detection
+               Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
 
-       mod->brush.qw_md4sum = 0;
-       mod->brush.qw_md4sum2 = 0;
-       for (i = 0;i < Q2HEADER_LUMPS;i++)
-       {
-               if (i == Q2LUMP_ENTITIES)
-                       continue;
-               mod->brush.qw_md4sum ^= Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
-               if (i == Q2LUMP_VISIBILITY || i == Q2LUMP_LEAFS || i == Q2LUMP_NODES)
-                       continue;
-               mod->brush.qw_md4sum2 ^= Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
+               // generate VBOs and other shared data before cloning submodels
+               if (i == 0)
+                       Mod_BuildVBOs();
        }
+       mod = loadmodel;
+
+       Con_DPrintf("Stats for q2bsp 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);
+}
 
-       Mod_Q2BSP_LoadEntities(&header->lumps[Q2LUMP_ENTITIES]);
-       Mod_Q2BSP_LoadPlanes(&header->lumps[Q2LUMP_PLANES]);
-       Mod_Q2BSP_LoadVertices(&header->lumps[Q2LUMP_VERTEXES]);
-       Mod_Q2BSP_LoadVisibility(&header->lumps[Q2LUMP_VISIBILITY]);
-       Mod_Q2BSP_LoadNodes(&header->lumps[Q2LUMP_NODES]);
-       Mod_Q2BSP_LoadTexInfo(&header->lumps[Q2LUMP_TEXINFO]);
-       Mod_Q2BSP_LoadFaces(&header->lumps[Q2LUMP_FACES]);
-       Mod_Q2BSP_LoadLighting(&header->lumps[Q2LUMP_LIGHTING]);
-       Mod_Q2BSP_LoadLeafs(&header->lumps[Q2LUMP_LEAFS]);
-       Mod_Q2BSP_LoadLeafFaces(&header->lumps[Q2LUMP_LEAFFACES]);
-       Mod_Q2BSP_LoadLeafBrushes(&header->lumps[Q2LUMP_LEAFBRUSHES]);
-       Mod_Q2BSP_LoadEdges(&header->lumps[Q2LUMP_EDGES]);
-       Mod_Q2BSP_LoadSurfEdges(&header->lumps[Q2LUMP_SURFEDGES]);
-       Mod_Q2BSP_LoadBrushes(&header->lumps[Q2LUMP_BRUSHES]);
-       Mod_Q2BSP_LoadBrushSides(&header->lumps[Q2LUMP_BRUSHSIDES]);
-       Mod_Q2BSP_LoadAreas(&header->lumps[Q2LUMP_AREAS]);
-       Mod_Q2BSP_LoadAreaPortals(&header->lumps[Q2LUMP_AREAPORTALS]);
-       // LordHavoc: must go last because this makes the submodels
-       Mod_Q2BSP_LoadModels(&header->lumps[Q2LUMP_MODELS]);
-}
-
-static int Mod_Q3BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativecontents);
-static int Mod_Q3BSP_NativeContentsFromSuperContents(dp_model_t *model, int supercontents);
+static int Mod_Q3BSP_SuperContentsFromNativeContents(int nativecontents);
+static int Mod_Q3BSP_NativeContentsFromSuperContents(int supercontents);
 
 static void Mod_Q3BSP_LoadEntities(lump_t *l)
 {
@@ -4586,13 +5307,12 @@ static void Mod_Q3BSP_LoadTextures(lump_t *l)
 
        for (i = 0;i < count;i++)
        {
-               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));
-               Mod_LoadTextureFromQ3Shader(out + i, out[i].name, true, true, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS);
+               out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(LittleLong(in[i].contents));
+               Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, out + i, in[i].name, true, true, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL);
                // restore the surfaceflags and supercontents
                out[i].surfaceflags = LittleLong(in[i].surfaceflags);
-               out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(loadmodel, LittleLong(in[i].contents));
+               out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(LittleLong(in[i].contents));
        }
 }
 
@@ -5078,7 +5798,7 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
                loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
 
        // allocate a texture pool if we need it
-       if (loadmodel->texturepool == NULL && cls.state != ca_dedicated)
+       if (loadmodel->texturepool == NULL)
                loadmodel->texturepool = R_AllocTexturePool();
 
        mergedpixels = (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4);
@@ -6077,7 +6797,7 @@ static void Mod_Q3BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambie
        //Con_Printf("result: ambient %f %f %f diffuse %f %f %f diffusenormal %f %f %f\n", ambientcolor[0], ambientcolor[1], ambientcolor[2], diffusecolor[0], diffusecolor[1], diffusecolor[2], diffusenormal[0], diffusenormal[1], diffusenormal[2]);
 }
 
-static int Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(mnode_t *node, double p1[3], double p2[3])
+static int Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(mnode_t *node, double p1[3], double p2[3], double endpos[3])
 {
        double t1, t2;
        double midf, mid[3];
@@ -6127,35 +6847,38 @@ static int Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(mnode_t *node, double p
                // or if start is solid and end is empty
                // as these degenerate cases usually indicate the eye is in solid and
                // should see the target point anyway
-               ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side    ], p1, mid);
+               ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side    ], p1, mid, endpos);
                if (ret != 0)
                        return ret;
-               ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side ^ 1], mid, p2);
+               ret = Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(node->children[side ^ 1], mid, p2, endpos);
                if (ret != 1)
                        return ret;
+               VectorCopy(mid, endpos);
                return 2;
        }
        return ((mleaf_t *)node)->clusterindex < 0;
 }
 
-static qboolean Mod_Q3BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end)
+static qboolean Mod_Q3BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end, const vec3_t acceptmins, const vec3_t acceptmaxs)
 {
        if (model->brush.submodel || mod_q3bsp_tracelineofsight_brushes.integer)
        {
                trace_t trace;
-               model->TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK);
-               return trace.fraction == 1;
+               model->TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK, 0, MATERIALFLAGMASK_TRANSLUCENT);
+               return trace.fraction == 1 || BoxesOverlap(trace.endpos, trace.endpos, acceptmins, acceptmaxs);
        }
        else
        {
-               double tracestart[3], traceend[3];
+               double tracestart[3], traceend[3], traceendpos[3];
                VectorCopy(start, tracestart);
                VectorCopy(end, traceend);
-               return !Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(model->brush.data_nodes, tracestart, traceend);
+               VectorCopy(end, traceendpos);
+               Mod_Q3BSP_TraceLineOfSight_RecursiveNodeCheck(model->brush.data_nodes, tracestart, traceend, traceendpos);
+               return BoxesOverlap(traceendpos, traceendpos, acceptmins, acceptmaxs);
        }
 }
 
-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)
+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, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        const bih_t *bih;
        const bih_leaf_t *leaf;
@@ -6168,8 +6891,9 @@ void Mod_CollisionBIH_TracePoint(dp_model_t *model, const frameblend_t *frameble
 
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
+       trace->skipsupercontentsmask = skipsupercontentsmask;
+       trace->skipmaterialflagsmask = skipmaterialflagsmask;
 
        bih = &model->collision_bih;
        if(!bih->nodes)
@@ -6220,7 +6944,7 @@ void Mod_CollisionBIH_TracePoint(dp_model_t *model, const frameblend_t *frameble
        }
 }
 
-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)
+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, int skipsupercontentsmask, int skipmaterialflagsmask, const bih_t *bih)
 {
        const bih_leaf_t *leaf;
        const bih_node_t *node;
@@ -6236,7 +6960,7 @@ static void Mod_CollisionBIH_TraceLineShared(dp_model_t *model, const frameblend
 
        if (VectorCompare(start, end))
        {
-               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                return;
        }
 
@@ -6244,8 +6968,9 @@ static void Mod_CollisionBIH_TraceLineShared(dp_model_t *model, const frameblend
 
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
+       trace->skipsupercontentsmask = skipsupercontentsmask;
+       trace->skipmaterialflagsmask = skipmaterialflagsmask;
 
        // push first node
        nodestackline[nodestackpos][0] = start[0];
@@ -6261,8 +6986,13 @@ static void Mod_CollisionBIH_TraceLineShared(dp_model_t *model, const frameblend
                node = bih->nodes + nodenum;
                VectorCopy(nodestackline[nodestackpos], nodestart);
                VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
-               sweepnodemins[0] = min(nodestart[0], nodeend[0]); sweepnodemins[1] = min(nodestart[1], nodeend[1]); sweepnodemins[2] = min(nodestart[2], nodeend[2]); sweepnodemaxs[0] = max(nodestart[0], nodeend[0]); sweepnodemaxs[1] = max(nodestart[1], nodeend[1]); sweepnodemaxs[2] = max(nodestart[2], nodeend[2]);
-               if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs))
+               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) && !collision_bih_fullrecursion.integer)
                        continue;
                if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
                {
@@ -6272,6 +7002,8 @@ static void Mod_CollisionBIH_TraceLineShared(dp_model_t *model, const frameblend
                        d2 = node->backmax - nodeend[axis];
                        d3 = nodestart[axis] - node->frontmin;
                        d4 = nodeend[axis] - node->frontmin;
+                       if (collision_bih_fullrecursion.integer)
+                               d1 = d2 = d3 = d4 = 1; // force full recursion
                        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;
@@ -6304,7 +7036,12 @@ static void Mod_CollisionBIH_TraceLineShared(dp_model_t *model, const frameblend
                        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]); sweepnodemins[1] = min(nodestart[1], nodeend[1]); sweepnodemins[2] = min(nodestart[2], nodeend[2]); sweepnodemaxs[0] = max(nodestart[0], nodeend[0]); sweepnodemaxs[1] = max(nodestart[1], nodeend[1]); sweepnodemaxs[2] = max(nodestart[2], nodeend[2]);
+                       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];
@@ -6334,17 +7071,17 @@ static void Mod_CollisionBIH_TraceLineShared(dp_model_t *model, const frameblend
        }
 }
 
-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)
+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, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        if (VectorCompare(start, end))
        {
-               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                return;
        }
-       Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, &model->collision_bih);
+       Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, &model->collision_bih);
 }
 
-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)
+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, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        const bih_t *bih;
        const bih_leaf_t *leaf;
@@ -6360,9 +7097,9 @@ void Mod_CollisionBIH_TraceBrush(dp_model_t *model, const frameblend_t *frameble
        if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(thisbrush_start->mins, thisbrush_start->maxs) && VectorCompare(thisbrush_end->mins, thisbrush_end->maxs))
        {
                if (VectorCompare(thisbrush_start->mins, thisbrush_end->mins))
-                       Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, thisbrush_start->mins, hitsupercontentsmask);
+                       Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, thisbrush_start->mins, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                else
-                       Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, thisbrush_start->mins, thisbrush_end->mins, hitsupercontentsmask);
+                       Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, thisbrush_start->mins, thisbrush_end->mins, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                return;
        }
 
@@ -6374,8 +7111,9 @@ void Mod_CollisionBIH_TraceBrush(dp_model_t *model, const frameblend_t *frameble
        // box trace, performed as brush trace
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
+       trace->skipsupercontentsmask = skipsupercontentsmask;
+       trace->skipmaterialflagsmask = skipmaterialflagsmask;
 
        // calculate tracebox-like parameters for efficient culling
        VectorMAM(0.5f, thisbrush_start->mins, 0.5f, thisbrush_start->maxs, start);
@@ -6405,7 +7143,12 @@ void Mod_CollisionBIH_TraceBrush(dp_model_t *model, const frameblend_t *frameble
                node = bih->nodes + nodenum;
                VectorCopy(nodestackline[nodestackpos], nodestart);
                VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
-               sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0]; sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1]; sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2]; sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0]; sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1]; sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2];
+               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)
@@ -6448,7 +7191,12 @@ void Mod_CollisionBIH_TraceBrush(dp_model_t *model, const frameblend_t *frameble
                        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]; sweepnodemins[1] = min(nodestart[1], nodeend[1]) + mins[1]; sweepnodemins[2] = min(nodestart[2], nodeend[2]) + mins[2]; sweepnodemaxs[0] = max(nodestart[0], nodeend[0]) + maxs[0]; sweepnodemaxs[1] = max(nodestart[1], nodeend[1]) + maxs[1]; sweepnodemaxs[2] = max(nodestart[2], nodeend[2]) + maxs[2];
+                       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];
@@ -6478,7 +7226,7 @@ void Mod_CollisionBIH_TraceBrush(dp_model_t *model, const frameblend_t *frameble
        }
 }
 
-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)
+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, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        colboxbrushf_t thisbrush_start, thisbrush_end;
        vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
@@ -6490,18 +7238,25 @@ void Mod_CollisionBIH_TraceBox(dp_model_t *model, const frameblend_t *frameblend
        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(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask);
+       Mod_CollisionBIH_TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 }
 
 
-static int Mod_CollisionBIH_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
+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);
+       Mod_CollisionBIH_TracePoint(model, NULL, NULL, &trace, point, 0, 0, 0);
        return trace.startsupercontents;
 }
 
-void Mod_CollisionBIH_TracePoint_Mesh(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask)
+qboolean Mod_CollisionBIH_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end, const vec3_t acceptmins, const vec3_t acceptmaxs)
+{
+       trace_t trace;
+       Mod_CollisionBIH_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK, 0, MATERIALFLAGMASK_TRANSLUCENT);
+       return trace.fraction == 1 || BoxesOverlap(trace.endpos, trace.endpos, acceptmins, acceptmaxs);
+}
+
+void Mod_CollisionBIH_TracePoint_Mesh(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
 #if 0
        // broken - needs to be modified to count front faces and backfaces to figure out if it is in solid
@@ -6511,15 +7266,17 @@ 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;
+       trace->skipsupercontentsmask = skipsupercontentsmask;
+       trace->skipmaterialflagsmask = skipmaterialflagsmask;
 #if 0
-       Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
+       Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
        hitsupercontents = trace->hitsupercontents;
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
+       trace->skipsupercontentsmask = skipsupercontentsmask;
+       trace->skipmaterialflagsmask = skipmaterialflagsmask;
        trace->startsupercontents = hitsupercontents;
 #endif
 }
@@ -6533,9 +7290,10 @@ 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(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
+       trace.hitsupercontentsmask = hitsupercontentsmask;
+       trace.skipsupercontentsmask = skipsupercontentsmask;
+       trace.skipmaterialflagsmask = skipmaterialflagsmask;
+       Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
        return trace.hitsupercontents;
 #else
        return 0;
@@ -6615,7 +7373,7 @@ 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;
                }
@@ -6757,16 +7515,17 @@ static void Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace_t *trace, dp_model_t *mo
 
 static int markframe = 0;
 
-static void Mod_Q3BSP_TracePoint(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask)
+static void Mod_Q3BSP_TracePoint(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        int i;
        q3mbrush_t *brush;
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
+       trace->skipsupercontentsmask = skipsupercontentsmask;
+       trace->skipmaterialflagsmask = skipmaterialflagsmask;
        if (mod_collision_bih.integer)
-               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
        else if (model->brush.submodel)
        {
                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
@@ -6777,7 +7536,7 @@ static void Mod_Q3BSP_TracePoint(dp_model_t *model, const frameblend_t *frameble
                Mod_Q3BSP_TracePoint_RecursiveBSPNode(trace, model, model->brush.data_nodes, start, ++markframe);
 }
 
-static void Mod_Q3BSP_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)
+static void Mod_Q3BSP_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, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        int i;
        float segmentmins[3], segmentmaxs[3];
@@ -6786,14 +7545,15 @@ static void Mod_Q3BSP_TraceLine(dp_model_t *model, const frameblend_t *frameblen
 
        if (VectorCompare(start, end))
        {
-               Mod_Q3BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+               Mod_Q3BSP_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                return;
        }
 
        memset(trace, 0, sizeof(*trace));
        trace->fraction = 1;
-       trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
+       trace->skipsupercontentsmask = skipsupercontentsmask;
+       trace->skipmaterialflagsmask = skipmaterialflagsmask;
        segmentmins[0] = min(start[0], end[0]) - 1;
        segmentmins[1] = min(start[1], end[1]) - 1;
        segmentmins[2] = min(start[2], end[2]) - 1;
@@ -6801,7 +7561,7 @@ 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(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
+               Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
        else if (model->brush.submodel)
        {
                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
@@ -6816,7 +7576,7 @@ 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_TraceBrush(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, colbrushf_t *start, colbrushf_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 skipsupercontentsmask, int skipmaterialflagsmask)
 {
        float segmentmins[3], segmentmaxs[3];
        int i;
@@ -6826,25 +7586,26 @@ static void Mod_Q3BSP_TraceBrush(dp_model_t *model, const frameblend_t *frameble
        if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(start->mins, start->maxs) && VectorCompare(end->mins, end->maxs))
        {
                if (VectorCompare(start->mins, end->mins))
-                       Mod_Q3BSP_TracePoint(model, frameblend, skeleton, trace, start->mins, hitsupercontentsmask);
+                       Mod_Q3BSP_TracePoint(model, frameblend, skeleton, trace, start->mins, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                else
-                       Mod_Q3BSP_TraceLine(model, frameblend, skeleton, trace, start->mins, end->mins, hitsupercontentsmask);
+                       Mod_Q3BSP_TraceLine(model, frameblend, skeleton, trace, start->mins, end->mins, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                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->mins[0], end->mins[0]);
-       segmentmins[1] = min(start->mins[1], end->mins[1]);
-       segmentmins[2] = min(start->mins[2], end->mins[2]);
-       segmentmaxs[0] = max(start->maxs[0], end->maxs[0]);
-       segmentmaxs[1] = max(start->maxs[1], end->maxs[1]);
-       segmentmaxs[2] = max(start->maxs[2], end->maxs[2]);
+       trace->skipsupercontentsmask = skipsupercontentsmask;
+       trace->skipmaterialflagsmask = skipmaterialflagsmask;
+       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(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
+               Mod_CollisionBIH_TraceBrush(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
        else if (model->brush.submodel)
        {
                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
@@ -6859,7 +7620,7 @@ static void Mod_Q3BSP_TraceBrush(dp_model_t *model, const frameblend_t *frameble
                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)
+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, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        colboxbrushf_t thisbrush_start, thisbrush_end;
        vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
@@ -6871,7 +7632,7 @@ static void Mod_Q3BSP_TraceBox(dp_model_t *model, const frameblend_t *frameblend
        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);
+       Mod_Q3BSP_TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 }
 
 static int Mod_Q3BSP_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
@@ -6910,9 +7671,9 @@ static int Mod_Q3BSP_PointSuperContents(struct model_s *model, int frame, const
        return supercontents;
 }
 
-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_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, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
-       Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, &model->render_bih);
+       Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, &model->render_bih);
 }
 
 
@@ -7051,7 +7812,7 @@ bih_t *Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces, bih_t
        return out;
 }
 
-static int Mod_Q3BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativecontents)
+static int Mod_Q3BSP_SuperContentsFromNativeContents(int nativecontents)
 {
        int supercontents = 0;
        if (nativecontents & CONTENTSQ3_SOLID)
@@ -7081,7 +7842,7 @@ static int Mod_Q3BSP_SuperContentsFromNativeContents(dp_model_t *model, int nati
        return supercontents;
 }
 
-static int Mod_Q3BSP_NativeContentsFromSuperContents(dp_model_t *model, int supercontents)
+static int Mod_Q3BSP_NativeContentsFromSuperContents(int supercontents)
 {
        int nativecontents = 0;
        if (supercontents & SUPERCONTENTS_SOLID)
@@ -7133,6 +7894,12 @@ static void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        mod->modeldatatypestring = "Q3BSP";
 
        mod->type = mod_brushq3;
+       mod->brush.ishlbsp = false;
+       mod->brush.isbsp2rmqe = false;
+       mod->brush.isbsp2 = false;
+       mod->brush.isq2bsp = false;
+       mod->brush.isq3bsp = true;
+       mod->brush.skymasking = true;
        mod->numframes = 2; // although alternate textures are not supported it is annoying to complain about no such frame 1
        mod->numskins = 1;
 
@@ -7437,9 +8204,9 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        int maxvn = 0, numvn = 1;
        char *texturenames = NULL;
        float dist, modelradius, modelyawradius, yawradius;
-       float *v = NULL;
-       float *vt = NULL;
-       float *vn = NULL;
+       float *obj_v = NULL;
+       float *obj_vt = NULL;
+       float *obj_vn = NULL;
        float mins[3];
        float maxs[3];
        float corner[3];
@@ -7453,7 +8220,7 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        skinfile_t *skinfiles = NULL;
        unsigned char *data = NULL;
        int *submodelfirstsurface;
-       msurface_t *surface;
+       msurface_t *tempsurface;
        msurface_t *tempsurfaces;
 
        memset(&vfirst, 0, sizeof(vfirst));
@@ -7559,19 +8326,19 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                        if (maxv <= numv)
                        {
                                maxv = max(maxv * 2, 1024);
-                               v = (float *)Mem_Realloc(tempmempool, v, maxv * sizeof(float[3]));
+                               obj_v = (float *)Mem_Realloc(tempmempool, obj_v, maxv * sizeof(float[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]);
+                               obj_v[numv*3+0] = atof(argv[1]);
+                               obj_v[numv*3+2] = atof(argv[2]);
+                               obj_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]);
+                               obj_v[numv*3+0] = atof(argv[1]);
+                               obj_v[numv*3+1] = atof(argv[2]);
+                               obj_v[numv*3+2] = atof(argv[3]);
                        }
                        numv++;
                }
@@ -7580,10 +8347,10 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                        if (maxvt <= numvt)
                        {
                                maxvt = max(maxvt * 2, 1024);
-                               vt = (float *)Mem_Realloc(tempmempool, vt, maxvt * sizeof(float[2]));
+                               obj_vt = (float *)Mem_Realloc(tempmempool, obj_vt, maxvt * sizeof(float[2]));
                        }
-                       vt[numvt*2+0] = atof(argv[1]);
-                       vt[numvt*2+1] = 1-atof(argv[2]);
+                       obj_vt[numvt*2+0] = atof(argv[1]);
+                       obj_vt[numvt*2+1] = 1-atof(argv[2]);
                        numvt++;
                }
                else if (!strcmp(argv[0], "vn"))
@@ -7591,19 +8358,19 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                        if (maxvn <= numvn)
                        {
                                maxvn = max(maxvn * 2, 1024);
-                               vn = (float *)Mem_Realloc(tempmempool, vn, maxvn * sizeof(float[3]));
+                               obj_vn = (float *)Mem_Realloc(tempmempool, obj_vn, maxvn * sizeof(float[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]);
+                               obj_vn[numvn*3+0] = atof(argv[1]);
+                               obj_vn[numvn*3+2] = atof(argv[2]);
+                               obj_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]);
+                               obj_vn[numvn*3+0] = atof(argv[1]);
+                               obj_vn[numvn*3+1] = atof(argv[2]);
+                               obj_vn[numvn*3+2] = atof(argv[3]);
                        }
                        numvn++;
                }
@@ -7644,12 +8411,12 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                                vcurrent.nextindex = -1;
                                vcurrent.textureindex = textureindex;
                                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 (obj_v && index1 >= 0 && index1 < numv)
+                                       VectorCopy(obj_v + 3*index1, vcurrent.v);
+                               if (obj_vt && index2 >= 0 && index2 < numvt)
+                                       Vector2Copy(obj_vt + 2*index2, vcurrent.vt);
+                               if (obj_vn && index3 >= 0 && index3 < numvn)
+                                       VectorCopy(obj_vn + 3*index3, vcurrent.vn);
                                if (numtriangles == 0)
                                {
                                        VectorCopy(vcurrent.v, mins);
@@ -7753,7 +8520,7 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        // 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;
+       tempsurface = tempsurfaces;
        for (submodelindex = 0;submodelindex < loadmodel->brush.numsubmodels;submodelindex++)
        {
                submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
@@ -7772,10 +8539,10 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                        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);
+                       tempsurface->texture = (texture_t *)((size_t)textureindex);
                        // calculate bounds as we go
-                       VectorCopy(thisvertex->v, surface->mins);
-                       VectorCopy(thisvertex->v, surface->maxs);
+                       VectorCopy(thisvertex->v, tempsurface->mins);
+                       VectorCopy(thisvertex->v, tempsurface->maxs);
                        for (;vertexindex < numtriangles*3;vertexindex++)
                        {
                                thisvertex = vertices + vertexindex;
@@ -7784,12 +8551,12 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                                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]);
+                               tempsurface->mins[0] = min(tempsurface->mins[0], thisvertex->v[0]);
+                               tempsurface->mins[1] = min(tempsurface->mins[1], thisvertex->v[1]);
+                               tempsurface->mins[2] = min(tempsurface->mins[2], thisvertex->v[2]);
+                               tempsurface->maxs[0] = max(tempsurface->maxs[0], thisvertex->v[0]);
+                               tempsurface->maxs[1] = max(tempsurface->maxs[1], thisvertex->v[1]);
+                               tempsurface->maxs[2] = max(tempsurface->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;
@@ -7812,13 +8579,13 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                                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;
-                       surface++;
+                       tempsurface->num_vertices = surfacevertices;
+                       tempsurface->num_triangles = surfacetriangles;
+                       tempsurface->num_firstvertex = firstvertex;
+                       tempsurface->num_firsttriangle = firsttriangle;
+                       firstvertex += tempsurface->num_vertices;
+                       firsttriangle += tempsurface->num_triangles;
+                       tempsurface++;
                        loadmodel->num_surfaces++;
                }
        }
@@ -7865,9 +8632,9 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        // free data
        Mem_Free(vertices);
        Mem_Free(texturenames);
-       Mem_Free(v);
-       Mem_Free(vt);
-       Mem_Free(vn);
+       Mem_Free(obj_v);
+       Mem_Free(obj_vt);
+       Mem_Free(obj_vn);
        Mem_Free(vertexhashtable);
        Mem_Free(vertexhashdata);
 
@@ -7957,24 +8724,24 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                for (j = 0;j < mod->nummodelsurfaces;j++)
                {
                        const msurface_t *surface = mod->data_surfaces + j + mod->firstmodelsurface;
-                       const float *v = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
+                       const float *v3f = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
                        int k;
                        if (!surface->num_vertices)
                                continue;
                        if (!l)
                        {
                                l = true;
-                               VectorCopy(v, mod->normalmins);
-                               VectorCopy(v, mod->normalmaxs);
+                               VectorCopy(v3f, mod->normalmins);
+                               VectorCopy(v3f, mod->normalmaxs);
                        }
-                       for (k = 0;k < surface->num_vertices;k++, v += 3)
+                       for (k = 0;k < surface->num_vertices;k++, v3f += 3)
                        {
-                               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]);
+                               mod->normalmins[0] = min(mod->normalmins[0], v3f[0]);
+                               mod->normalmins[1] = min(mod->normalmins[1], v3f[1]);
+                               mod->normalmins[2] = min(mod->normalmins[2], v3f[2]);
+                               mod->normalmaxs[0] = max(mod->normalmaxs[0], v3f[0]);
+                               mod->normalmaxs[1] = max(mod->normalmaxs[1], v3f[1]);
+                               mod->normalmaxs[2] = max(mod->normalmaxs[2], v3f[2]);
                        }
                }
                corner[0] = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));