]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - model_brush.c
convert lightmaps to sRGB for nice sRGB support
[xonotic/darkplaces.git] / model_brush.c
index 7b965f450895a72e8e1fccb8b5b50c5537c97327..088671193e612439db269020e0823808c857afc1 100644 (file)
@@ -27,8 +27,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 
 //cvar_t r_subdivide_size = {CVAR_SAVE, "r_subdivide_size", "128", "how large water polygons should be (smaller values produce more polygons which give better warping effects)"};
+cvar_t mod_bsp_portalize = {0, "mod_bsp_portalize", "1", "enables portal generation from BSP tree (may take several seconds per map), used by r_drawportals, r_useportalculling, r_shadow_realtime_world_compileportalculling, sv_cullentities_portal"};
 cvar_t r_novis = {0, "r_novis", "0", "draws whole level, see also sv_cullentities_pvs 0"};
-cvar_t r_picmipworld = {CVAR_SAVE, "r_picmipworld", "1", "whether gl_picmip shall apply to world textures too"};
 cvar_t r_nosurftextures = {0, "r_nosurftextures", "0", "pretends there was no texture lump found in the q1bsp/hlbsp loading (useful for debugging this rare case)"};
 cvar_t r_subdivisions_tolerance = {0, "r_subdivisions_tolerance", "4", "maximum error tolerance on curve subdivision for rendering purposes (in other words, the curves will be given as many polygons as necessary to represent curves at this quality)"};
 cvar_t r_subdivisions_mintess = {0, "r_subdivisions_mintess", "0", "minimum number of subdivisions (values above 0 will smooth curves that don't need it)"};
@@ -38,6 +38,8 @@ cvar_t r_subdivisions_collision_tolerance = {0, "r_subdivisions_collision_tolera
 cvar_t r_subdivisions_collision_mintess = {0, "r_subdivisions_collision_mintess", "0", "minimum number of subdivisions (values above 0 will smooth curves that don't need it)"};
 cvar_t r_subdivisions_collision_maxtess = {0, "r_subdivisions_collision_maxtess", "1024", "maximum number of subdivisions (prevents curves beyond a certain detail level, limits smoothing)"};
 cvar_t r_subdivisions_collision_maxvertices = {0, "r_subdivisions_collision_maxvertices", "4225", "maximum vertices allowed per subdivided curve"};
+cvar_t r_trippy = {0, "r_trippy", "0", "easter egg"};
+cvar_t 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_q3bsp_curves_collisions = {0, "mod_q3bsp_curves_collisions", "1", "enables collisions with curves (SLOW)"};
 cvar_t mod_q3bsp_curves_collisions_stride = {0, "mod_q3bsp_curves_collisions_stride", "16", "collisions against curves: optimize performance by doing a combined collision check for this triangle amount first (-1 avoids any box tests)"};
 cvar_t mod_q3bsp_curves_stride = {0, "mod_q3bsp_curves_stride", "16", "particle effect collisions against curves: optimize performance by doing a combined collision check for this triangle amount first (-1 avoids any box tests)"};
@@ -46,6 +48,16 @@ cvar_t mod_q3bsp_debugtracebrush = {0, "mod_q3bsp_debugtracebrush", "0", "select
 cvar_t mod_q3bsp_lightmapmergepower = {CVAR_SAVE, "mod_q3bsp_lightmapmergepower", "4", "merges the quake3 128x128 lightmap textures into larger lightmap group textures to speed up rendering, 1 = 256x256, 2 = 512x512, 3 = 1024x1024, 4 = 2048x2048, 5 = 4096x4096, ..."};
 cvar_t mod_q3bsp_nolightmaps = {CVAR_SAVE, "mod_q3bsp_nolightmaps", "0", "do not load lightmaps in Q3BSP maps (to save video RAM, but be warned: it looks ugly)"};
 cvar_t mod_q3bsp_tracelineofsight_brushes = {0, "mod_q3bsp_tracelineofsight_brushes", "0", "enables culling of entities behind detail brushes, curves, etc"};
+cvar_t mod_q3shader_default_offsetmapping = {CVAR_SAVE, "mod_q3shader_default_offsetmapping", "1", "use offsetmapping by default on all surfaces that are using q3 shader files"};
+cvar_t mod_q3shader_default_offsetmapping_scale = {CVAR_SAVE, "mod_q3shader_default_offsetmapping_scale", "1", "default scale used for offsetmapping"};
+cvar_t mod_q3shader_default_offsetmapping_bias = {CVAR_SAVE, "mod_q3shader_default_offsetmapping_bias", "0", "default bias used for offsetmapping"};
+cvar_t mod_q3shader_default_polygonfactor = {0, "mod_q3shader_default_polygonfactor", "0", "biases depth values of 'polygonoffset' shaders to prevent z-fighting artifacts"};
+cvar_t mod_q3shader_default_polygonoffset = {0, "mod_q3shader_default_polygonoffset", "-2", "biases depth values of 'polygonoffset' shaders to prevent z-fighting artifacts"};
+cvar_t mod_q3shader_force_addalpha = {0, "mod_q3shader_force_addalpha", "0", "treat GL_ONE GL_ONE (or add) blendfunc as GL_SRC_ALPHA GL_ONE for compatibility with older DarkPlaces releases"};
+cvar_t mod_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"};
+extern cvar_t vid_sRGB;
 
 static texture_t mod_q1bsp_texture_solid;
 static texture_t mod_q1bsp_texture_sky;
@@ -56,8 +68,8 @@ static texture_t mod_q1bsp_texture_water;
 void Mod_BrushInit(void)
 {
 //     Cvar_RegisterVariable(&r_subdivide_size);
+       Cvar_RegisterVariable(&mod_bsp_portalize);
        Cvar_RegisterVariable(&r_novis);
-       Cvar_RegisterVariable(&r_picmipworld);
        Cvar_RegisterVariable(&r_nosurftextures);
        Cvar_RegisterVariable(&r_subdivisions_tolerance);
        Cvar_RegisterVariable(&r_subdivisions_mintess);
@@ -67,6 +79,8 @@ void Mod_BrushInit(void)
        Cvar_RegisterVariable(&r_subdivisions_collision_mintess);
        Cvar_RegisterVariable(&r_subdivisions_collision_maxtess);
        Cvar_RegisterVariable(&r_subdivisions_collision_maxvertices);
+       Cvar_RegisterVariable(&r_trippy);
+       Cvar_RegisterVariable(&mod_noshader_default_offsetmapping);
        Cvar_RegisterVariable(&mod_q3bsp_curves_collisions);
        Cvar_RegisterVariable(&mod_q3bsp_curves_collisions_stride);
        Cvar_RegisterVariable(&mod_q3bsp_curves_stride);
@@ -75,6 +89,20 @@ void Mod_BrushInit(void)
        Cvar_RegisterVariable(&mod_q3bsp_lightmapmergepower);
        Cvar_RegisterVariable(&mod_q3bsp_nolightmaps);
        Cvar_RegisterVariable(&mod_q3bsp_tracelineofsight_brushes);
+       Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping);
+       Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping_scale);
+       Cvar_RegisterVariable(&mod_q3shader_default_offsetmapping_bias);
+       Cvar_RegisterVariable(&mod_q3shader_default_polygonfactor);
+       Cvar_RegisterVariable(&mod_q3shader_default_polygonoffset);
+       Cvar_RegisterVariable(&mod_q3shader_force_addalpha);
+       Cvar_RegisterVariable(&mod_q1bsp_polygoncollisions);
+       Cvar_RegisterVariable(&mod_collision_bih);
+       Cvar_RegisterVariable(&mod_recalculatenodeboxes);
+
+       // these games were made for older DP engines and are no longer
+       // maintained; use this hack to show their textures properly
+       if(gamemode == GAME_NEXUIZ)
+               Cvar_SetQuick(&mod_q3shader_force_addalpha, "1");
 
        memset(&mod_q1bsp_texture_solid, 0, sizeof(mod_q1bsp_texture_solid));
        strlcpy(mod_q1bsp_texture_solid.name, "solid" , sizeof(mod_q1bsp_texture_solid.name));
@@ -522,17 +550,17 @@ static void Mod_Q1BSP_FindNonSolidLocation_r_Leaf(findnonsolidlocationinfo_t *in
                surface = info->model->data_surfaces + *mark;
                if (surface->texture->supercontents & SUPERCONTENTS_SOLID)
                {
-                       if(surface->num_bboxstride > 0)
+                       if(surface->deprecatedq3num_bboxstride > 0)
                        {
                                int i, cnt, tri;
-                               cnt = (surface->num_triangles + surface->num_bboxstride - 1) / surface->num_bboxstride;
+                               cnt = (surface->num_triangles + surface->deprecatedq3num_bboxstride - 1) / surface->deprecatedq3num_bboxstride;
                                for(i = 0; i < cnt; ++i)
                                {
-                                       if(BoxesOverlap(surface->data_bbox6f + i * 6, surface->data_bbox6f + i * 6 + 3, info->absmin, info->absmax))
+                                       if(BoxesOverlap(surface->deprecatedq3data_bbox6f + i * 6, surface->deprecatedq3data_bbox6f + i * 6 + 3, info->absmin, info->absmax))
                                        {
-                                               for(k = 0; k < surface->num_bboxstride; ++k)
+                                               for(k = 0; k < surface->deprecatedq3num_bboxstride; ++k)
                                                {
-                                                       tri = i * surface->num_bboxstride + k;
+                                                       tri = i * surface->deprecatedq3num_bboxstride + k;
                                                        if(tri >= surface->num_triangles)
                                                                break;
                                                        Mod_Q1BSP_FindNonSolidLocation_r_Triangle(info, surface, tri);
@@ -1017,7 +1045,7 @@ static int Mod_Q1BSP_PointSuperContents(struct model_s *model, int frame, const
        return Mod_Q1BSP_SuperContentsFromNativeContents(NULL, 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, 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 boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture)
 {
 #if 1
        colbrushf_t cbox;
@@ -1123,7 +1151,7 @@ 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, 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 boxsupercontents, int boxq3surfaceflags, const texture_t *boxtexture)
 {
        memset(trace, 0, sizeof(trace_t));
        trace->fraction = 1;
@@ -1142,7 +1170,7 @@ void Collision_ClipTrace_Point(trace_t *trace, const vec3_t cmins, const vec3_t
 static qboolean Mod_Q1BSP_TraceLineOfSight(struct model_s *model, const vec3_t start, const vec3_t end)
 {
        trace_t trace;
-       model->TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK);
+       Mod_Q1BSP_TraceLine(model, NULL, NULL, &trace, start, end, SUPERCONTENTS_VISBLOCKERMASK);
        return trace.fraction == 1;
 }
 
@@ -1280,6 +1308,188 @@ void Mod_Q1BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambientcolor
        Mod_Q1BSP_LightPoint_RecursiveBSPNode(model, ambientcolor, diffusecolor, diffusenormal, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, p[0], p[1], p[2] + 0.125, p[2] - 65536);
 }
 
+static const texture_t *Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(RecursiveHullCheckTraceInfo_t *t, const dp_model_t *model, const mnode_t *node, double mid[3])
+{
+       int i;
+       int j;
+       int k;
+       const msurface_t *surface;
+       float normal[3];
+       float v0[3];
+       float v1[3];
+       float edgedir[3];
+       float edgenormal[3];
+       float p[4];
+       float midf;
+       float t1;
+       float t2;
+       VectorCopy(mid, p);
+       p[3] = 1;
+       surface = model->data_surfaces + node->firstsurface;
+       for (i = 0;i < node->numsurfaces;i++, surface++)
+       {
+               // skip surfaces whose bounding box does not include the point
+//             if (!BoxesOverlap(mid, mid, surface->mins, surface->maxs))
+//                     continue;
+               // skip faces with contents we don't care about
+               if (!(t->trace->hitsupercontentsmask & surface->texture->supercontents))
+                       continue;
+               // get the surface normal - since it is flat we know any vertex normal will suffice
+               VectorCopy(model->surfmesh.data_normal3f + 3 * surface->num_firstvertex, normal);
+               // skip backfaces
+               if (DotProduct(t->dist, normal) > 0)
+                       continue;
+               // iterate edges and see if the point is outside one of them
+               for (j = 0, k = surface->num_vertices - 1;j < surface->num_vertices;k = j, j++)
+               {
+                       VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + k), v0);
+                       VectorCopy(model->surfmesh.data_vertex3f + 3 * (surface->num_firstvertex + j), v1);
+                       VectorSubtract(v0, v1, edgedir);
+                       CrossProduct(edgedir, normal, edgenormal);
+                       if (DotProduct(edgenormal, p) > DotProduct(edgenormal, v0))
+                               break;
+               }
+               // if the point is outside one of the edges, it is not within the surface
+               if (j < surface->num_vertices)
+                       continue;
+
+               // we hit a surface, this is the impact point...
+               VectorCopy(normal, t->trace->plane.normal);
+               t->trace->plane.dist = DotProduct(normal, p);
+
+               // calculate the true fraction
+               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);
+               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;
+               return surface->texture->currentframe;
+       }
+       return NULL;
+}
+
+static int Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(RecursiveHullCheckTraceInfo_t *t, const dp_model_t *model, const mnode_t *node, const double p1[3], const double p2[3])
+{
+       const mplane_t *plane;
+       double t1, t2;
+       int side;
+       double midf, mid[3];
+       const mleaf_t *leaf;
+
+       while (node->plane)
+       {
+               plane = node->plane;
+               if (plane->type < 3)
+               {
+                       t1 = p1[plane->type] - plane->dist;
+                       t2 = p2[plane->type] - plane->dist;
+               }
+               else
+               {
+                       t1 = DotProduct (plane->normal, p1) - plane->dist;
+                       t2 = DotProduct (plane->normal, p2) - plane->dist;
+               }
+               if (t1 < 0)
+               {
+                       if (t2 < 0)
+                       {
+                               node = node->children[1];
+                               continue;
+                       }
+                       side = 1;
+               }
+               else
+               {
+                       if (t2 >= 0)
+                       {
+                               node = node->children[0];
+                               continue;
+                       }
+                       side = 0;
+               }
+
+               // the line intersects, find intersection point
+               // LordHavoc: this uses the original trace for maximum accuracy
+               if (plane->type < 3)
+               {
+                       t1 = t->start[plane->type] - plane->dist;
+                       t2 = t->end[plane->type] - plane->dist;
+               }
+               else
+               {
+                       t1 = DotProduct (plane->normal, t->start) - plane->dist;
+                       t2 = DotProduct (plane->normal, t->end) - plane->dist;
+               }
+       
+               midf = t1 / (t1 - t2);
+               VectorMA(t->start, midf, t->dist, mid);
+
+               // recurse both sides, front side first, return if we hit a surface
+               if (Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side], p1, mid) == HULLCHECKSTATE_DONE)
+                       return HULLCHECKSTATE_DONE;
+
+               // test each surface on the node
+               Mod_Q1BSP_TraceLineAgainstSurfacesFindTextureOnNode(t, model, node, mid);
+               if (t->trace->hittexture)
+                       return HULLCHECKSTATE_DONE;
+
+               // recurse back side
+               return Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(t, model, node->children[side ^ 1], mid, p2);
+       }
+       leaf = (const mleaf_t *)node;
+       side = Mod_Q1BSP_SuperContentsFromNativeContents(NULL, leaf->contents);
+       if (!t->trace->startfound)
+       {
+               t->trace->startfound = true;
+               t->trace->startsupercontents |= side;
+       }
+       if (side & SUPERCONTENTS_LIQUIDSMASK)
+               t->trace->inwater = true;
+       if (side == 0)
+               t->trace->inopen = true;
+       if (side & t->trace->hitsupercontentsmask)
+       {
+               // if the first leaf is solid, set startsolid
+               if (t->trace->allsolid)
+                       t->trace->startsolid = true;
+               return HULLCHECKSTATE_SOLID;
+       }
+       else
+       {
+               t->trace->allsolid = false;
+               return HULLCHECKSTATE_EMPTY;
+       }
+}
+
+static void Mod_Q1BSP_TraceLineAgainstSurfaces(struct model_s *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
+{
+       RecursiveHullCheckTraceInfo_t rhc;
+
+       memset(&rhc, 0, sizeof(rhc));
+       memset(trace, 0, sizeof(trace_t));
+       rhc.trace = trace;
+       rhc.trace->hitsupercontentsmask = hitsupercontentsmask;
+       rhc.trace->fraction = 1;
+       rhc.trace->realfraction = 1;
+       rhc.trace->allsolid = true;
+       rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
+       VectorCopy(start, rhc.start);
+       VectorCopy(end, rhc.end);
+       VectorSubtract(rhc.end, rhc.start, rhc.dist);
+       Mod_Q1BSP_TraceLineAgainstSurfacesRecursiveBSPNode(&rhc, model, model->brush.data_nodes + rhc.hull->firstclipnode, rhc.start, rhc.end);
+       VectorMA(rhc.start, rhc.trace->fraction, rhc.dist, rhc.trace->endpos);
+}
+
 static void Mod_Q1BSP_DecompressVis(const unsigned char *in, const unsigned char *inend, unsigned char *out, unsigned char *outend)
 {
        int c;
@@ -1326,8 +1536,8 @@ void R_Q1BSP_LoadSplitSky (unsigned char *src, int width, int height, int bytesp
        int x, y;
        int w = width/2;
        int h = height;
-       unsigned *solidpixels = Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
-       unsigned *alphapixels = Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
+       unsigned int *solidpixels = (unsigned int *)Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
+       unsigned int *alphapixels = (unsigned int *)Mem_Alloc(tempmempool, w*h*sizeof(unsigned char[4]));
 
        // allocate a texture pool if we need it
        if (loadmodel->texturepool == NULL && cls.state != ca_dedicated)
@@ -1381,8 +1591,8 @@ void R_Q1BSP_LoadSplitSky (unsigned char *src, int width, int height, int bytesp
                }
        }
 
-       loadmodel->brush.solidskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_solidtexture", 0         , (unsigned char *) solidpixels, w, h);
-       loadmodel->brush.alphaskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_alphatexture", TEXF_ALPHA, (unsigned char *) alphapixels, w, h);
+       loadmodel->brush.solidskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_solidtexture", 0         , (unsigned char *) solidpixels, w, h, vid.sRGB3D);
+       loadmodel->brush.alphaskyskinframe = R_SkinFrame_LoadInternalBGRA("sky_alphatexture", TEXF_ALPHA, (unsigned char *) alphapixels, w, h, vid.sRGB3D);
        Mem_Free(solidpixels);
        Mem_Free(alphapixels);
 }
@@ -1393,13 +1603,14 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
        skinframe_t *skinframe;
        miptex_t *dmiptex;
        texture_t *tx, *tx2, *anims[10], *altanims[10];
+       texture_t backuptex;
        dmiptexlump_t *m;
        unsigned char *data, *mtdata;
        const char *s;
        char mapname[MAX_QPATH], name[MAX_QPATH];
-       unsigned char zero[4];
-
-       memset(zero, 0, sizeof(zero));
+       unsigned char zeroopaque[4], zerotrans[4];
+       Vector4Set(zeroopaque, 0, 0, 0, 255);
+       Vector4Set(zerotrans, 0, 0, 0, 128);
 
        loadmodel->data_textures = NULL;
 
@@ -1459,6 +1670,9 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                tx->reflectfactor = 1;
                Vector4Set(tx->reflectcolor4f, 1, 1, 1, 1);
                tx->r_water_wateralpha = 1;
+               tx->offsetmapping = OFFSETMAPPING_DEFAULT;
+               tx->offsetscale = 1;
+               tx->offsetbias = 0;
                tx->specularscalemod = 1;
                tx->specularpowermod = 1;
        }
@@ -1525,8 +1739,11 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                        if (name[j] >= 'A' && name[j] <= 'Z')
                                name[j] += 'a' - 'A';
 
+               // LordHavoc: backup the texture_t because q3 shader loading overwrites it
+               backuptex = loadmodel->data_textures[i];
                if (dmiptex->name[0] && Mod_LoadTextureFromQ3Shader(loadmodel->data_textures + i, name, false, false, 0))
                        continue;
+               loadmodel->data_textures[i] = backuptex;
 
                tx = loadmodel->data_textures + i;
                strlcpy(tx->name, name, sizeof(tx->name));
@@ -1567,7 +1784,9 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                        // LordHavoc: HL sky textures are entirely different than quake
                        if (!loadmodel->brush.ishlbsp && !strncmp(tx->name, "sky", 3) && mtwidth == mtheight * 2)
                        {
-                               data = loadimagepixelsbgra(tx->name, false, false);
+                               data = loadimagepixelsbgra(gamemode == GAME_TENEBRAE ? tx->name : va("textures/%s/%s", mapname, tx->name), false, false, false, NULL);
+                               if (!data)
+                                       data = loadimagepixelsbgra(gamemode == GAME_TENEBRAE ? tx->name : va("textures/%s", tx->name), false, false, false, NULL);
                                if (data && image_width == image_height * 2)
                                {
                                        R_Q1BSP_LoadSplitSky(data, image_width, image_height, 4);
@@ -1578,9 +1797,11 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                        }
                        else
                        {
-                               skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va("textures/%s/%s", mapname, tx->name), TEXF_ALPHA | TEXF_MIPMAP | (r_picmipworld.integer ? TEXF_PICMIP : 0) | TEXF_COMPRESS, false);
+                               skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va("textures/%s/%s", mapname, tx->name), TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, false);
                                if (!skinframe)
-                                       skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va("textures/%s", tx->name), TEXF_ALPHA | TEXF_MIPMAP | (r_picmipworld.integer ? TEXF_PICMIP : 0) | TEXF_COMPRESS, false);
+                                       skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va("textures/%s", tx->name), TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS, false);
+                               if (skinframe)
+                                       tx->offsetmapping = OFFSETMAPPING_DEFAULT; // allow offsetmapping on external textures without a q3 shader
                                if (!skinframe)
                                {
                                        // did not find external texture, load it from the bsp or wad3
@@ -1597,56 +1818,56 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                                                {
                                                        tx->width = image_width;
                                                        tx->height = image_height;
-                                                       skinframe = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_ALPHA | TEXF_MIPMAP | (r_picmipworld.integer ? TEXF_PICMIP : 0), pixels, image_width, image_height);
+                                                       skinframe = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_ALPHA | TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP, pixels, image_width, image_height, true);
                                                }
                                                if (freepixels)
                                                        Mem_Free(freepixels);
                                        }
                                        else if (mtdata) // texture included
-                                               skinframe = R_SkinFrame_LoadInternalQuake(tx->name, TEXF_MIPMAP | (r_picmipworld.integer ? TEXF_PICMIP : 0), false, r_fullbrights.integer, mtdata, tx->width, tx->height);
+                                               skinframe = R_SkinFrame_LoadInternalQuake(tx->name, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP, false, r_fullbrights.integer, mtdata, tx->width, tx->height);
                                }
                                // if skinframe is still NULL the "missing" texture will be used
                                if (skinframe)
                                        tx->skinframes[0] = skinframe;
                        }
-
-                       tx->basematerialflags = MATERIALFLAG_WALL;
-                       if (tx->name[0] == '*')
-                       {
-                               // LordHavoc: some turbulent textures should not be affected by wateralpha
-                               if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
-                               {
-                                       // replace the texture with transparent black
-                                       Vector4Set(zero, 128, 128, 128, 128);
-                                       tx->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_MIPMAP | TEXF_ALPHA, zero, 1, 1);
-                                       tx->basematerialflags |= MATERIALFLAG_NOSHADOW | MATERIALFLAG_ADD | MATERIALFLAG_BLENDED | MATERIALFLAG_REFLECTION;
-                               }
-                               else if (!strncmp(tx->name,"*lava",5)
-                                || !strncmp(tx->name,"*teleport",9)
-                                || !strncmp(tx->name,"*rift",5)) // Scourge of Armagon texture
-                                       tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW;
-                               else
-                                       tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW | MATERIALFLAG_WATERALPHA | MATERIALFLAG_WATERSHADER;
-                               if (tx->skinframes[0] && tx->skinframes[0]->hasalpha)
-                                       tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
-                       }
+                       // LordHavoc: some Tenebrae textures get replaced by black
+                       if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
+                               tx->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_MIPMAP | TEXF_ALPHA, zerotrans, 1, 1, false);
                        else if (!strncmp(tx->name, "mirror", 6)) // Tenebrae
-                       {
-                               // replace the texture with black
-                               tx->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, 0, zero, 1, 1);
-                               tx->basematerialflags |= MATERIALFLAG_REFLECTION;
-                       }
-                       else if (!strncmp(tx->name, "sky", 3))
-                               tx->basematerialflags = MATERIALFLAG_SKY | MATERIALFLAG_NOSHADOW;
-                       else if (!strcmp(tx->name, "caulk"))
-                               tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
-                       else if (tx->skinframes[0] && tx->skinframes[0]->hasalpha)
-                               tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
+                               tx->skinframes[0] = R_SkinFrame_LoadInternalBGRA(tx->name, 0, zeroopaque, 1, 1, false);
+               }
 
-                       // start out with no animation
-                       tx->currentframe = tx;
-                       tx->currentskinframe = tx->skinframes[0];
+               tx->basematerialflags = MATERIALFLAG_WALL;
+               if (tx->name[0] == '*')
+               {
+                       // LordHavoc: some turbulent textures should not be affected by wateralpha
+                       if (!strncmp(tx->name, "*glassmirror", 12)) // Tenebrae
+                               tx->basematerialflags |= MATERIALFLAG_NOSHADOW | MATERIALFLAG_ADD | MATERIALFLAG_BLENDED | MATERIALFLAG_REFLECTION;
+                       else if (!strncmp(tx->name,"*lava",5)
+                        || !strncmp(tx->name,"*teleport",9)
+                        || !strncmp(tx->name,"*rift",5)) // Scourge of Armagon texture
+                               tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW;
+                       else
+                               tx->basematerialflags |= MATERIALFLAG_WATERSCROLL | MATERIALFLAG_LIGHTBOTHSIDES | MATERIALFLAG_NOSHADOW | MATERIALFLAG_WATERALPHA | MATERIALFLAG_WATERSHADER;
+                       if (tx->skinframes[0] && tx->skinframes[0]->hasalpha)
+                               tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
+               }
+               else if (!strncmp(tx->name, "mirror", 6)) // Tenebrae
+               {
+                       // replace the texture with black
+                       tx->basematerialflags |= MATERIALFLAG_REFLECTION;
                }
+               else if (!strncmp(tx->name, "sky", 3))
+                       tx->basematerialflags = MATERIALFLAG_SKY | MATERIALFLAG_NOSHADOW;
+               else if (!strcmp(tx->name, "caulk"))
+                       tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
+               else if (tx->skinframes[0] && tx->skinframes[0]->hasalpha)
+                       tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
+
+               // start out with no animation
+               tx->currentframe = tx;
+               tx->currentskinframe = tx->skinframes[0];
+               tx->currentmaterialflags = tx->basematerialflags;
        }
 
        // sequence the animations
@@ -2328,8 +2549,8 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                }
 
                // compile additional data about the surface geometry
-               Mod_BuildNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_normal3f, true);
-               Mod_BuildTextureVectorsFromNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, true);
+               Mod_BuildNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
+               Mod_BuildTextureVectorsFromNormals(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle), loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
                BoxFromPoints(surface->mins, surface->maxs, surface->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex));
 
                // generate surface extents information
@@ -2402,6 +2623,7 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                        // lightmap is needed on this surface (rather than duplicating the
                        // logic above)
                        loadmodel->brushq1.lightmapupdateflags[surfacenum] = true;
+                       loadmodel->lit = true;
                }
        }
 
@@ -2443,11 +2665,11 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                                        loadmodel->texturepool = R_AllocTexturePool();
                                // could not find room, make a new lightmap
                                loadmodel->brushq3.num_mergedlightmaps = lightmapnumber + 1;
-                               loadmodel->brushq3.data_lightmaps = Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_lightmaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_lightmaps[0]));
-                               loadmodel->brushq3.data_deluxemaps = Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_deluxemaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_deluxemaps[0]));
-                               loadmodel->brushq3.data_lightmaps[lightmapnumber] = lightmaptexture = R_LoadTexture2D(loadmodel->texturepool, va("lightmap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, NULL);
+                               loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_lightmaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_lightmaps[0]));
+                               loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Realloc(loadmodel->mempool, loadmodel->brushq3.data_deluxemaps, loadmodel->brushq3.num_mergedlightmaps * sizeof(loadmodel->brushq3.data_deluxemaps[0]));
+                               loadmodel->brushq3.data_lightmaps[lightmapnumber] = lightmaptexture = R_LoadTexture2D(loadmodel->texturepool, va("lightmap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, -1, NULL);
                                if (loadmodel->brushq1.nmaplightdata)
-                                       loadmodel->brushq3.data_deluxemaps[lightmapnumber] = deluxemaptexture = R_LoadTexture2D(loadmodel->texturepool, va("deluxemap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, NULL);
+                                       loadmodel->brushq3.data_deluxemaps[lightmapnumber] = deluxemaptexture = R_LoadTexture2D(loadmodel->texturepool, va("deluxemap%i", lightmapnumber), lightmapsize, lightmapsize, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_ALLOWUPDATES, -1, NULL);
                                lightmapnumber++;
                                Mod_AllocLightmap_Reset(&allocState);
                                Mod_AllocLightmap_Block(&allocState, ssize, tsize, &lightmapx, &lightmapy);
@@ -2547,6 +2769,8 @@ static void Mod_Q1BSP_LoadNodes(lump_t *l)
        if (l->filelen % sizeof(*in))
                Host_Error("Mod_Q1BSP_LoadNodes: funny lump size in %s",loadmodel->name);
        count = l->filelen / sizeof(*in);
+       if (count == 0)
+               Host_Error("Mod_Q1BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
        out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count*sizeof(*out));
 
        loadmodel->brush.data_nodes = out;
@@ -2963,10 +3187,13 @@ static void Mod_Q1BSP_FinalizePortals(void)
        // leafs (because qbsp is very sloppy)
        leaf = loadmodel->brush.data_leafs;
        endleaf = leaf + loadmodel->brush.num_leafs;
-       for (;leaf < endleaf;leaf++)
+       if (mod_recalculatenodeboxes.integer)
        {
-               VectorSet(leaf->mins,  2000000000,  2000000000,  2000000000);
-               VectorSet(leaf->maxs, -2000000000, -2000000000, -2000000000);
+               for (;leaf < endleaf;leaf++)
+               {
+                       VectorSet(leaf->mins,  2000000000,  2000000000,  2000000000);
+                       VectorSet(leaf->maxs, -2000000000, -2000000000, -2000000000);
+               }
        }
        numportals = 0;
        numpoints = 0;
@@ -3051,23 +3278,27 @@ static void Mod_Q1BSP_FinalizePortals(void)
                                portal++;
                        }
                        // add the portal's polygon points to the leaf bounding boxes
-                       for (i = 0;i < 2;i++)
+                       if (mod_recalculatenodeboxes.integer)
                        {
-                               leaf = (mleaf_t *)p->nodes[i];
-                               for (j = 0;j < p->numpoints;j++)
+                               for (i = 0;i < 2;i++)
                                {
-                                       if (leaf->mins[0] > p->points[j*3+0]) leaf->mins[0] = p->points[j*3+0];
-                                       if (leaf->mins[1] > p->points[j*3+1]) leaf->mins[1] = p->points[j*3+1];
-                                       if (leaf->mins[2] > p->points[j*3+2]) leaf->mins[2] = p->points[j*3+2];
-                                       if (leaf->maxs[0] < p->points[j*3+0]) leaf->maxs[0] = p->points[j*3+0];
-                                       if (leaf->maxs[1] < p->points[j*3+1]) leaf->maxs[1] = p->points[j*3+1];
-                                       if (leaf->maxs[2] < p->points[j*3+2]) leaf->maxs[2] = p->points[j*3+2];
+                                       leaf = (mleaf_t *)p->nodes[i];
+                                       for (j = 0;j < p->numpoints;j++)
+                                       {
+                                               if (leaf->mins[0] > p->points[j*3+0]) leaf->mins[0] = p->points[j*3+0];
+                                               if (leaf->mins[1] > p->points[j*3+1]) leaf->mins[1] = p->points[j*3+1];
+                                               if (leaf->mins[2] > p->points[j*3+2]) leaf->mins[2] = p->points[j*3+2];
+                                               if (leaf->maxs[0] < p->points[j*3+0]) leaf->maxs[0] = p->points[j*3+0];
+                                               if (leaf->maxs[1] < p->points[j*3+1]) leaf->maxs[1] = p->points[j*3+1];
+                                               if (leaf->maxs[2] < p->points[j*3+2]) leaf->maxs[2] = p->points[j*3+2];
+                                       }
                                }
                        }
                }
        }
        // now recalculate the node bounding boxes from the leafs
-       Mod_Q1BSP_RecursiveRecalcNodeBBox(loadmodel->brush.data_nodes + loadmodel->brushq1.hulls[0].firstclipnode);
+       if (mod_recalculatenodeboxes.integer)
+               Mod_Q1BSP_RecursiveRecalcNodeBBox(loadmodel->brush.data_nodes + loadmodel->brushq1.hulls[0].firstclipnode);
 }
 
 /*
@@ -3164,7 +3395,7 @@ static void Mod_Q1BSP_RecursiveNodePortals(mnode_t *node)
        if (portalpointsbuffersize < portalpointsbufferoffset + 6*MAX_PORTALPOINTS)
        {
                portalpointsbuffersize = portalpointsbufferoffset * 2;
-               portalpointsbuffer = Mem_Realloc(loadmodel->mempool, portalpointsbuffer, portalpointsbuffersize * sizeof(*portalpointsbuffer));
+               portalpointsbuffer = (double *)Mem_Realloc(loadmodel->mempool, portalpointsbuffer, portalpointsbuffersize * sizeof(*portalpointsbuffer));
        }
        frontpoints = portalpointsbuffer + portalpointsbufferoffset;
        portalpointsbufferoffset += 3*MAX_PORTALPOINTS;
@@ -3297,7 +3528,7 @@ static void Mod_Q1BSP_MakePortals(void)
        Mem_ExpandableArray_NewArray(&portalarray, loadmodel->mempool, sizeof(portal_t), 1020*1024/sizeof(portal_t));
        portalpointsbufferoffset = 0;
        portalpointsbuffersize = 6*MAX_PORTALPOINTS*128;
-       portalpointsbuffer = Mem_Alloc(loadmodel->mempool, portalpointsbuffersize * sizeof(*portalpointsbuffer));
+       portalpointsbuffer = (double *)Mem_Alloc(loadmodel->mempool, portalpointsbuffersize * sizeof(*portalpointsbuffer));
        Mod_Q1BSP_RecursiveNodePortals(loadmodel->brush.data_nodes + loadmodel->brushq1.hulls[0].firstclipnode);
        Mem_Free(portalpointsbuffer);
        portalpointsbuffer = NULL;
@@ -3353,7 +3584,7 @@ static int Mod_Q1BSP_FatPVS(dp_model_t *model, const vec3_t org, vec_t radius, u
 {
        int bytes = model->brush.num_pvsclusterbytes;
        bytes = min(bytes, pvsbufferlength);
-       if (r_novis.integer || !model->brush.num_pvsclusters || !Mod_Q1BSP_GetPVS(model, org))
+       if (r_novis.integer || r_trippy.integer || !model->brush.num_pvsclusters || !Mod_Q1BSP_GetPVS(model, org))
        {
                memset(pvsbuffer, 0xFF, bytes);
                return bytes;
@@ -3397,15 +3628,40 @@ static void Mod_Q1BSP_RoundUpToHullSize(dp_model_t *cmodel, const vec3_t inmins,
        VectorAdd(inmins, hull->clip_size, outmaxs);
 }
 
+static int Mod_Q1BSP_CreateShadowMesh(dp_model_t *mod)
+{
+       int j;
+       int numshadowmeshtriangles = 0;
+       msurface_t *surface;
+       if (cls.state == ca_dedicated)
+               return 0;
+       // make a single combined shadow mesh to allow optimized shadow volume creation
+
+       for (j = 0, surface = mod->data_surfaces;j < mod->num_surfaces;j++, surface++)
+       {
+               surface->num_firstshadowmeshtriangle = numshadowmeshtriangles;
+               numshadowmeshtriangles += surface->num_triangles;
+       }
+       mod->brush.shadowmesh = Mod_ShadowMesh_Begin(mod->mempool, numshadowmeshtriangles * 3, numshadowmeshtriangles, NULL, NULL, NULL, false, false, true);
+       for (j = 0, surface = mod->data_surfaces;j < mod->num_surfaces;j++, surface++)
+               if (surface->num_triangles > 0)
+                       Mod_ShadowMesh_AddMesh(mod->mempool, mod->brush.shadowmesh, NULL, NULL, NULL, mod->surfmesh.data_vertex3f, NULL, NULL, NULL, NULL, surface->num_triangles, (mod->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
+       mod->brush.shadowmesh = Mod_ShadowMesh_Finish(mod->mempool, mod->brush.shadowmesh, false, r_enableshadowvolumes.integer != 0, false);
+       if (mod->brush.shadowmesh && mod->brush.shadowmesh->neighbor3i)
+               Mod_BuildTriangleNeighbors(mod->brush.shadowmesh->neighbor3i, mod->brush.shadowmesh->element3i, mod->brush.shadowmesh->numtriangles);
+
+       return numshadowmeshtriangles;
+}
+
+void Mod_CollisionBIH_TraceLineAgainstSurfaces(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask);
+
 void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
        int i, j, k;
        dheader_t *header;
        dmodel_t *bm;
-       mempool_t *mainmempool;
        float dist, modelyawradius, modelradius;
        msurface_t *surface;
-       int numshadowmeshtriangles;
        hullinfo_t hullinfo;
        int totalstylesurfaces, totalstyles, stylecounts[256], remapstyles[256];
        model_brush_lightstyleinfo_t styleinfo[256];
@@ -3456,9 +3712,13 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 
        mod->soundfromcenter = true;
        mod->TraceBox = Mod_Q1BSP_TraceBox;
-       mod->TraceLine = Mod_Q1BSP_TraceLine;
+       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->TracePoint = Mod_Q1BSP_TracePoint;
        mod->PointSuperContents = Mod_Q1BSP_PointSuperContents;
+       mod->TraceLineAgainstSurfaces = Mod_Q1BSP_TraceLineAgainstSurfaces;
        mod->brush.TraceLineOfSight = Mod_Q1BSP_TraceLineOfSight;
        mod->brush.SuperContentsFromNativeContents = Mod_Q1BSP_SuperContentsFromNativeContents;
        mod->brush.NativeContentsFromSuperContents = Mod_Q1BSP_NativeContentsFromSuperContents;
@@ -3527,25 +3787,14 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        mod->brushq1.num_compressedpvs = 0;
 
        Mod_Q1BSP_MakeHull0();
-       Mod_Q1BSP_MakePortals();
+       if (mod_bsp_portalize.integer)
+               Mod_Q1BSP_MakePortals();
 
        mod->numframes = 2;             // regular and alternate animation
        mod->numskins = 1;
 
-       mainmempool = mod->mempool;
-
        // make a single combined shadow mesh to allow optimized shadow volume creation
-       numshadowmeshtriangles = 0;
-       for (j = 0, surface = loadmodel->data_surfaces;j < loadmodel->num_surfaces;j++, surface++)
-       {
-               surface->num_firstshadowmeshtriangle = numshadowmeshtriangles;
-               numshadowmeshtriangles += surface->num_triangles;
-       }
-       loadmodel->brush.shadowmesh = Mod_ShadowMesh_Begin(loadmodel->mempool, numshadowmeshtriangles * 3, numshadowmeshtriangles, NULL, NULL, NULL, false, false, true);
-       for (j = 0, surface = loadmodel->data_surfaces;j < loadmodel->num_surfaces;j++, surface++)
-               Mod_ShadowMesh_AddMesh(loadmodel->mempool, loadmodel->brush.shadowmesh, NULL, NULL, NULL, loadmodel->surfmesh.data_vertex3f, NULL, NULL, NULL, NULL, surface->num_triangles, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
-       loadmodel->brush.shadowmesh = Mod_ShadowMesh_Finish(loadmodel->mempool, loadmodel->brush.shadowmesh, false, true, false);
-       Mod_BuildTriangleNeighbors(loadmodel->brush.shadowmesh->neighbor3i, loadmodel->brush.shadowmesh->element3i, loadmodel->brush.shadowmesh->numtriangles);
+       Mod_Q1BSP_CreateShadowMesh(loadmodel);
 
        if (loadmodel->brush.numsubmodels)
                loadmodel->brush.submodels = (dp_model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
@@ -3671,7 +3920,7 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                                mod->DrawSky = R_Q1BSP_DrawSky;
 
                        for (j = 0, surface = &mod->data_surfaces[mod->firstmodelsurface];j < mod->nummodelsurfaces;j++, surface++)
-                               if (surface->texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION))
+                               if (surface->texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA))
                                        break;
                        if (j < mod->nummodelsurfaces)
                                mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
@@ -3721,6 +3970,19 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                }
                //mod->brushq1.num_visleafs = bm->visleafs;
 
+               // build a Bounding Interval Hierarchy for culling triangles in light rendering
+               Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
+
+               if (mod_q1bsp_polygoncollisions.integer)
+               {
+                       mod->collision_bih = mod->render_bih;
+                       // point traces and contents checks still use the bsp tree
+                       mod->TraceLine = Mod_CollisionBIH_TraceLine;
+                       mod->TraceBox = Mod_CollisionBIH_TraceBox;
+                       mod->TraceBrush = Mod_CollisionBIH_TraceBrush;
+                       mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLineAgainstSurfaces;
+               }
+
                // generate VBOs and other shared data before cloning submodels
                if (i == 0)
                {
@@ -4258,13 +4520,11 @@ static void Mod_Q3BSP_LoadTextures(lump_t *l)
                strlcpy (out[i].name, in[i].name, sizeof (out[i].name));
                out[i].surfaceflags = LittleLong(in[i].surfaceflags);
                out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(loadmodel, LittleLong(in[i].contents));
+               Mod_LoadTextureFromQ3Shader(out + i, out[i].name, true, true, TEXF_MIPMAP | TEXF_ISWORLD | TEXF_PICMIP | TEXF_COMPRESS);
+               // restore the surfaceflags and supercontents
+               out[i].surfaceflags = LittleLong(in[i].surfaceflags);
+               out[i].supercontents = Mod_Q3BSP_SuperContentsFromNativeContents(loadmodel, LittleLong(in[i].contents));
        }
-
-       if (cls.state == ca_dedicated)
-               return;
-
-       for (i = 0;i < count;i++, in++, out++)
-               Mod_LoadTextureFromQ3Shader(out, out->name, true, true, TEXF_MIPMAP | (r_picmipworld.integer ? TEXF_PICMIP : 0) | TEXF_COMPRESS);
 }
 
 static void Mod_Q3BSP_LoadPlanes(lump_t *l)
@@ -4468,6 +4728,8 @@ static void Mod_Q3BSP_LoadVertices(lump_t *l)
                loadmodel->brushq3.data_color4f[i * 4 + 1] = in->color4ub[1] * (1.0f / 255.0f);
                loadmodel->brushq3.data_color4f[i * 4 + 2] = in->color4ub[2] * (1.0f / 255.0f);
                loadmodel->brushq3.data_color4f[i * 4 + 3] = in->color4ub[3] * (1.0f / 255.0f);
+               if(in->color4ub[0] != 255 || in->color4ub[1] != 255 || in->color4ub[2] != 255)
+                       loadmodel->lit = true;
        }
 }
 
@@ -4481,8 +4743,16 @@ static void Mod_Q3BSP_LoadTriangles(lump_t *l)
        if (l->filelen % sizeof(int[3]))
                Host_Error("Mod_Q3BSP_LoadTriangles: funny lump size in %s",loadmodel->name);
        count = l->filelen / sizeof(*in);
-       out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
 
+       if(!loadmodel->brushq3.num_vertices)
+       {
+               if (count)
+                       Con_Printf("Mod_Q3BSP_LoadTriangles: %s has triangles but no vertexes, broken compiler, ignoring problem\n", loadmodel->name);
+               loadmodel->brushq3.num_triangles = 0;
+               return;
+       }
+
+       out = (int *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
        loadmodel->brushq3.num_triangles = count / 3;
        loadmodel->brushq3.data_element3i = out;
 
@@ -4492,8 +4762,6 @@ static void Mod_Q3BSP_LoadTriangles(lump_t *l)
                if (*out < 0 || *out >= loadmodel->brushq3.num_vertices)
                {
                        Con_Printf("Mod_Q3BSP_LoadTriangles: invalid vertexindex %i (%i vertices), setting to 0\n", *out, loadmodel->brushq3.num_vertices);
-                       if(!loadmodel->brushq3.num_vertices)
-                               Host_Error("Mod_Q1BSP_LoadTrianglles: %s has triangles but no vertexes, cannot fix\n", loadmodel->name);
                        *out = 0;
                }
        }
@@ -4502,12 +4770,32 @@ static void Mod_Q3BSP_LoadTriangles(lump_t *l)
 static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
 {
        q3dlightmap_t *input_pointer;
-       int i, j, k, count, power, power2, mask, endlightmap, mergewidth, mergeheight;
+       int i;
+       int j;
+       int k;
+       int count;
+       int powerx;
+       int powery;
+       int powerxy;
+       int powerdxy;
+       int endlightmap;
+       int mergegoal;
+       int lightmapindex;
+       int realcount;
+       int realindex;
+       int mergedwidth;
+       int mergedheight;
+       int mergedcolumns;
+       int mergedrows;
+       int mergedrowsxcolumns;
+       int size;
+       int bytesperpixel;
+       int rgbmap[3];
        unsigned char *c;
-
-       unsigned char *convertedpixels;
+       unsigned char *mergedpixels;
+       unsigned char *mergeddeluxepixels;
+       unsigned char *mergebuf;
        char mapname[MAX_QPATH];
-       int size, bytesperpixel, rgbmap[3];
        qboolean external;
        unsigned char *inpixels[10000]; // max count q3map2 can output (it uses 4 digits)
 
@@ -4546,7 +4834,7 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
                if (developer_loading.integer)
                        Con_Printf("Using external lightmaps\n");
                FS_StripExtension(loadmodel->name, mapname, sizeof(mapname));
-               inpixels[0] = loadimagepixelsbgra(va("%s/lm_%04d", mapname, 0), false, false);
+               inpixels[0] = loadimagepixelsbgra(va("%s/lm_%04d", mapname, 0), false, false, false, NULL);
                if(!inpixels[0])
                        return;
 
@@ -4566,19 +4854,19 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
 
                for(count = 1; ; ++count)
                {
-                       inpixels[count] = loadimagepixelsbgra(va("%s/lm_%04d", mapname, count), false, false);
+                       inpixels[count] = loadimagepixelsbgra(va("%s/lm_%04d", mapname, count), false, false, false, NULL);
                        if(!inpixels[count])
                                break; // we got all of them
                        if(image_width != size || image_height != size)
                        {
-                               for(i = 0; i <= count; ++i)
-                                       Mem_Free(inpixels[i]);
-                               Host_Error("Mod_Q3BSP_LoadLightmaps: invalid external lightmap size in %s",loadmodel->name);
+                               Mem_Free(inpixels[count]);
+                               inpixels[count] = NULL;
+                               Con_Printf("Mod_Q3BSP_LoadLightmaps: mismatched lightmap size in %s - external lightmap %s/lm_%04d does not match earlier ones\n", loadmodel->name, mapname, count);
+                               break;
                        }
                }
        }
 
-       convertedpixels = (unsigned char *) Mem_Alloc(tempmempool, size*size*4);
        loadmodel->brushq3.lightmapsize = size;
        loadmodel->brushq3.num_originallightmaps = count;
 
@@ -4648,18 +4936,42 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
 
        // figure out what the most reasonable merge power is within limits
 
-       loadmodel->brushq3.num_lightmapmergepower = 0;
-
-       for(i = 0; (128 << i) < size; ++i)
-               ;
-       // i is now 0 for 128, 1 for 256, etc
-
-       for (power = 1;power + i <= mod_q3bsp_lightmapmergepower.integer && (size << power) <= (int)vid.maxtexturesize_2d && (1 << (power * 2)) < 4 * (count >> (loadmodel->brushq3.deluxemapping ? 1 : 0)); power++)
-               loadmodel->brushq3.num_lightmapmergepower = power;
-
-       loadmodel->brushq3.num_lightmapmerge = 1 << loadmodel->brushq3.num_lightmapmergepower;
-
-       loadmodel->brushq3.num_mergedlightmaps = ((count >> (loadmodel->brushq3.deluxemapping ? 1 : 0)) + (1 << (loadmodel->brushq3.num_lightmapmergepower * 2)) - 1) >> (loadmodel->brushq3.num_lightmapmergepower * 2);
+       // find the appropriate NxN dimensions to merge to, to avoid wasted space
+       realcount = count >> (int)loadmodel->brushq3.deluxemapping;
+
+       // figure out how big the merged texture has to be
+       mergegoal = 128<<bound(0, mod_q3bsp_lightmapmergepower.integer, 6);
+       mergegoal = bound(size, mergegoal, (int)vid.maxtexturesize_2d);
+       while (mergegoal > size && mergegoal * mergegoal / 4 >= size * size * realcount)
+               mergegoal /= 2;
+       mergedwidth = mergegoal;
+       mergedheight = mergegoal;
+       // choose non-square size (2x1 aspect) if only half the space is used;
+       // this really only happens when the entire set fits in one texture, if
+       // there are multiple textures, we don't worry about shrinking the last
+       // one to fit, because the driver prefers the same texture size on
+       // consecutive draw calls...
+       if (mergedwidth * mergedheight / 2 >= size*size*realcount)
+               mergedheight /= 2;
+
+       loadmodel->brushq3.num_lightmapmergedwidthpower = 0;
+       loadmodel->brushq3.num_lightmapmergedheightpower = 0;
+       while (mergedwidth > size<<loadmodel->brushq3.num_lightmapmergedwidthpower)
+               loadmodel->brushq3.num_lightmapmergedwidthpower++;
+       while (mergedheight > size<<loadmodel->brushq3.num_lightmapmergedheightpower)
+               loadmodel->brushq3.num_lightmapmergedheightpower++;
+       loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower = loadmodel->brushq3.num_lightmapmergedwidthpower + loadmodel->brushq3.num_lightmapmergedheightpower + (loadmodel->brushq3.deluxemapping ? 1 : 0);
+
+       powerx = loadmodel->brushq3.num_lightmapmergedwidthpower;
+       powery = loadmodel->brushq3.num_lightmapmergedheightpower;
+       powerxy = powerx+powery;
+       powerdxy = loadmodel->brushq3.deluxemapping + powerxy;
+
+       mergedcolumns = 1 << powerx;
+       mergedrows = 1 << powery;
+       mergedrowsxcolumns = 1 << powerxy;
+
+       loadmodel->brushq3.num_mergedlightmaps = (realcount + (1 << powerxy) - 1) >> powerxy;
        loadmodel->brushq3.data_lightmaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
        if (loadmodel->brushq3.deluxemapping)
                loadmodel->brushq3.data_deluxemaps = (rtexture_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
@@ -4668,61 +4980,47 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
        if (loadmodel->texturepool == NULL && cls.state != ca_dedicated)
                loadmodel->texturepool = R_AllocTexturePool();
 
-       power = loadmodel->brushq3.num_lightmapmergepower;
-       power2 = power * 2;
-       mask = (1 << power) - 1;
+       mergedpixels = (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4);
+       mergeddeluxepixels = loadmodel->brushq3.deluxemapping ? (unsigned char *) Mem_Alloc(tempmempool, mergedwidth * mergedheight * 4) : NULL;
        for (i = 0;i < count;i++)
        {
                // figure out which merged lightmap texture this fits into
-               int lightmapindex = i >> (loadmodel->brushq3.deluxemapping + power2);
-               for (k = 0;k < size*size;k++)
-               {
-                       convertedpixels[k*4+0] = inpixels[i][k*bytesperpixel+rgbmap[0]];
-                       convertedpixels[k*4+1] = inpixels[i][k*bytesperpixel+rgbmap[1]];
-                       convertedpixels[k*4+2] = inpixels[i][k*bytesperpixel+rgbmap[2]];
-                       convertedpixels[k*4+3] = 255;
-               }
-               if (loadmodel->brushq3.num_lightmapmergepower > 0)
+               realindex = i >> (int)loadmodel->brushq3.deluxemapping;
+               lightmapindex = i >> powerdxy;
+
+               // choose the destination address
+               mergebuf = (loadmodel->brushq3.deluxemapping && (i & 1)) ? mergeddeluxepixels : mergedpixels;
+               mergebuf += 4 * (realindex & (mergedcolumns-1))*size + 4 * ((realindex >> powerx) & (mergedrows-1))*mergedwidth*size;
+               if ((i & 1) == 0 || !loadmodel->brushq3.deluxemapping)
+                       Con_DPrintf("copying original lightmap %i (%ix%i) to %i (at %i,%i)\n", i, size, size, lightmapindex, (realindex & (mergedcolumns-1))*size, ((realindex >> powerx) & (mergedrows-1))*size);
+
+               // convert pixels from RGB or BGRA while copying them into the destination rectangle
+               for (j = 0;j < size;j++)
+               for (k = 0;k < size;k++)
                {
-                       // if the lightmap has not been allocated yet, create it
-                       if (!loadmodel->brushq3.data_lightmaps[lightmapindex])
-                       {
-                               // create a lightmap only as large as necessary to hold the
-                               // remaining size*size blocks
-                               // if there are multiple merged lightmap textures then they will
-                               // all be full size except the last one which may be smaller
-                               // because it only needs to the remaining blocks, and it will often
-                               // be odd sizes like 2048x512 due to only being 25% full or so.
-                               j = (count >> (loadmodel->brushq3.deluxemapping ? 1 : 0)) - (lightmapindex << power2);
-                               for (mergewidth = 1;mergewidth < j && mergewidth < (1 << power);mergewidth *= 2)
-                                       ;
-                               for (mergeheight = 1;mergewidth*mergeheight < j && mergeheight < (1 << power);mergeheight *= 2)
-                                       ;
-                               if (developer_loading.integer)
-                                       Con_Printf("lightmap merge texture #%i is %ix%i (%i of %i used)\n", lightmapindex, mergewidth*size, mergeheight*size, min(j, mergewidth*mergeheight), mergewidth*mergeheight);
-                               loadmodel->brushq3.data_lightmaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("lightmap%04i", lightmapindex), mergewidth * size, mergeheight * size, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : TEXF_ALLOWUPDATES), NULL);
-                               if (loadmodel->brushq3.data_deluxemaps)
-                                       loadmodel->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("deluxemap%04i", lightmapindex), mergewidth * size, mergeheight * size, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : TEXF_ALLOWUPDATES), NULL);
-                       }
-                       mergewidth = R_TextureWidth(loadmodel->brushq3.data_lightmaps[lightmapindex]) / size;
-                       mergeheight = R_TextureHeight(loadmodel->brushq3.data_lightmaps[lightmapindex]) / size;
-                       j = (i >> (loadmodel->brushq3.deluxemapping ? 1 : 0)) & ((1 << power2) - 1);
-                       if (loadmodel->brushq3.deluxemapping && (i & 1))
-                               R_UpdateTexture(loadmodel->brushq3.data_deluxemaps[lightmapindex], convertedpixels, (j % mergewidth) * size, (j / mergewidth) * size, size, size);
-                       else
-                               R_UpdateTexture(loadmodel->brushq3.data_lightmaps [lightmapindex], convertedpixels, (j % mergewidth) * size, (j / mergewidth) * size, size, size);
+                       mergebuf[(j*mergedwidth+k)*4+0] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[0]];
+                       mergebuf[(j*mergedwidth+k)*4+1] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[1]];
+                       mergebuf[(j*mergedwidth+k)*4+2] = inpixels[i][(j*size+k)*bytesperpixel+rgbmap[2]];
+                       mergebuf[(j*mergedwidth+k)*4+3] = 255;
                }
-               else
+
+               // upload texture if this was the last tile being written to the texture
+               if (((realindex + 1) & (mergedrowsxcolumns - 1)) == 0 || (realindex + 1) == realcount)
                {
-                       // figure out which merged lightmap texture this fits into
                        if (loadmodel->brushq3.deluxemapping && (i & 1))
-                               loadmodel->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("deluxemap%04i", lightmapindex), size, size, convertedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : 0), NULL);
+                               loadmodel->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("deluxemap%04i", lightmapindex), mergedwidth, mergedheight, mergeddeluxepixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : 0), -1, NULL);
                        else
-                               loadmodel->brushq3.data_lightmaps [lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("lightmap%04i", lightmapindex), size, size, convertedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), NULL);
+                       {
+                               if(vid_sRGB.integer && !vid.sRGBcapable3D)
+                                       Image_MakesRGBColorsFromLinear(mergedpixels, mergedpixels, mergedwidth * mergedheight);
+                               loadmodel->brushq3.data_lightmaps [lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("lightmap%04i", lightmapindex), mergedwidth, mergedheight, mergedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), -1, NULL);
+                       }
                }
        }
 
-       Mem_Free(convertedpixels);
+       if (mergeddeluxepixels)
+               Mem_Free(mergeddeluxepixels);
+       Mem_Free(mergedpixels);
        if(external)
        {
                for(i = 0; i < count; ++i)
@@ -4801,7 +5099,7 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
 {
        q3dface_t *in, *oldin;
        msurface_t *out, *oldout;
-       int i, oldi, j, n, count, invalidelements, patchsize[2], finalwidth, finalheight, xtess, ytess, finalvertices, finaltriangles, firstvertex, firstelement, type, oldnumtriangles, oldnumtriangles2, meshvertices, meshtriangles, numvertices, numtriangles, cxtess, cytess;
+       int i, oldi, j, n, count, invalidelements, patchsize[2], finalwidth, finalheight, xtess, ytess, finalvertices, finaltriangles, firstvertex, firstelement, type, oldnumtriangles, oldnumtriangles2, meshvertices, meshtriangles, collisionvertices, collisiontriangles, numvertices, numtriangles, cxtess, cytess;
        float lightmaptcbase[2], lightmaptcscale[2];
        //int *originalelement3i;
        //int *originalneighbor3i;
@@ -4812,6 +5110,8 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
        float *originalcolor4f;
        float *originaltexcoordtexture2f;
        float *originaltexcoordlightmap2f;
+       float *surfacecollisionvertex3f;
+       int *surfacecollisionelement3i;
        float *v;
        patchtess_t *patchtess = NULL;
        int patchtesscount = 0;
@@ -4882,9 +5182,10 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                        }
                        else
                        {
-                               out->lightmaptexture = loadmodel->brushq3.data_lightmaps[n >> (loadmodel->brushq3.num_lightmapmergepower * 2 + loadmodel->brushq3.deluxemapping)];
+                               out->lightmaptexture = loadmodel->brushq3.data_lightmaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
                                if (loadmodel->brushq3.deluxemapping)
-                                       out->deluxemaptexture = loadmodel->brushq3.data_deluxemaps[n >> (loadmodel->brushq3.num_lightmapmergepower * 2 + loadmodel->brushq3.deluxemapping)];
+                                       out->deluxemaptexture = loadmodel->brushq3.data_deluxemaps[n >> loadmodel->brushq3.num_lightmapmergedwidthheightdeluxepower];
+                               loadmodel->lit = true;
                        }
                }
 
@@ -4993,6 +5294,8 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
        while (again);
 
        // Calculate resulting number of triangles
+       collisionvertices = 0;
+       collisiontriangles = 0;
        for(i = 0; i < patchtesscount; ++i)
        {
                finalwidth = Q3PatchDimForTess(patchtess[i].info.xsize, patchtess[i].info.lods[PATCH_LOD_VISUAL].xtess);
@@ -5004,14 +5307,31 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                oldout[patchtess[i].surface_id].num_triangles = numtriangles;
                meshvertices += oldout[patchtess[i].surface_id].num_vertices;
                meshtriangles += oldout[patchtess[i].surface_id].num_triangles;
+
+               finalwidth = Q3PatchDimForTess(patchtess[i].info.xsize, patchtess[i].info.lods[PATCH_LOD_COLLISION].xtess);
+               finalheight = Q3PatchDimForTess(patchtess[i].info.ysize,patchtess[i].info.lods[PATCH_LOD_COLLISION].ytess);
+               numvertices = finalwidth * finalheight;
+               numtriangles = (finalwidth - 1) * (finalheight - 1) * 2;
+
+               oldout[patchtess[i].surface_id].num_collisionvertices = numvertices;
+               oldout[patchtess[i].surface_id].num_collisiontriangles = numtriangles;
+               collisionvertices += oldout[patchtess[i].surface_id].num_collisionvertices;
+               collisiontriangles += oldout[patchtess[i].surface_id].num_collisiontriangles;
        }
 
        i = oldi;
        in = oldin;
        out = oldout;
        Mod_AllocSurfMesh(loadmodel->mempool, meshvertices, meshtriangles, false, true, false);
+       if (collisiontriangles)
+       {
+               loadmodel->brush.data_collisionvertex3f = (float *)Mem_Alloc(loadmodel->mempool, collisionvertices * sizeof(float[3]));
+               loadmodel->brush.data_collisionelement3i = (int *)Mem_Alloc(loadmodel->mempool, collisiontriangles * sizeof(int[3]));
+       }
        meshvertices = 0;
        meshtriangles = 0;
+       collisionvertices = 0;
+       collisiontriangles = 0;
        for (;i < count && meshvertices + out->num_vertices <= loadmodel->surfmesh.num_vertices;i++, in++, out++)
        {
                if (out->num_vertices < 3 || out->num_triangles < 1)
@@ -5022,6 +5342,7 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                firstelement = LittleLong(in->firstelement);
                out->num_firstvertex = meshvertices;
                out->num_firsttriangle = meshtriangles;
+               out->num_firstcollisiontriangle = collisiontriangles;
                switch(type)
                {
                case Q3FACETYPE_FLAT:
@@ -5075,7 +5396,7 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                        finalwidth = Q3PatchDimForTess(patchsize[0],xtess); //((patchsize[0] - 1) * xtess) + 1;
                        finalheight = Q3PatchDimForTess(patchsize[1],ytess); //((patchsize[1] - 1) * ytess) + 1;
                        finalvertices = finalwidth * finalheight;
-                       finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
+                       oldnumtriangles = finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
                        type = Q3FACETYPE_MESH;
                        // generate geometry
                        // (note: normals are skipped because they get recalculated)
@@ -5100,28 +5421,50 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                        finalwidth = Q3PatchDimForTess(patchsize[0],cxtess); //((patchsize[0] - 1) * cxtess) + 1;
                        finalheight = Q3PatchDimForTess(patchsize[1],cytess); //((patchsize[1] - 1) * cytess) + 1;
                        finalvertices = finalwidth * finalheight;
-                       finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
+                       oldnumtriangles2 = finaltriangles = (finalwidth - 1) * (finalheight - 1) * 2;
 
-                       out->data_collisionvertex3f = (float *)Mem_Alloc(loadmodel->mempool, sizeof(float[3]) * finalvertices);
-                       out->data_collisionelement3i = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int[3]) * finaltriangles);
+                       // legacy collision geometry implementation
+                       out->deprecatedq3data_collisionvertex3f = (float *)Mem_Alloc(loadmodel->mempool, sizeof(float[3]) * finalvertices);
+                       out->deprecatedq3data_collisionelement3i = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int[3]) * finaltriangles);
                        out->num_collisionvertices = finalvertices;
                        out->num_collisiontriangles = finaltriangles;
-                       Q3PatchTesselateFloat(3, sizeof(float[3]), out->data_collisionvertex3f, patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, cxtess, cytess);
-                       Q3PatchTriangleElements(out->data_collisionelement3i, finalwidth, finalheight, 0);
+                       Q3PatchTesselateFloat(3, sizeof(float[3]), out->deprecatedq3data_collisionvertex3f, patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, cxtess, cytess);
+                       Q3PatchTriangleElements(out->deprecatedq3data_collisionelement3i, finalwidth, finalheight, 0);
 
                        //Mod_SnapVertices(3, out->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), 0.25);
-                       Mod_SnapVertices(3, out->num_collisionvertices, out->data_collisionvertex3f, 1);
+                       Mod_SnapVertices(3, finalvertices, out->deprecatedq3data_collisionvertex3f, 1);
 
-                       oldnumtriangles = out->num_triangles;
-                       oldnumtriangles2 = out->num_collisiontriangles;
-                       out->num_collisiontriangles = Mod_RemoveDegenerateTriangles(out->num_collisiontriangles, out->data_collisionelement3i, out->data_collisionelement3i, out->data_collisionvertex3f);
+                       out->num_collisiontriangles = Mod_RemoveDegenerateTriangles(finaltriangles, out->deprecatedq3data_collisionelement3i, out->deprecatedq3data_collisionelement3i, out->deprecatedq3data_collisionvertex3f);
 
                        // now optimize the collision mesh by finding triangle bboxes...
-                       Mod_Q3BSP_BuildBBoxes(out->data_collisionelement3i, out->num_collisiontriangles, out->data_collisionvertex3f, &out->data_collisionbbox6f, &out->num_collisionbboxstride, mod_q3bsp_curves_collisions_stride.integer);
-                       Mod_Q3BSP_BuildBBoxes(loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle, out->num_triangles, loadmodel->surfmesh.data_vertex3f, &out->data_bbox6f, &out->num_bboxstride, mod_q3bsp_curves_stride.integer);
+                       Mod_Q3BSP_BuildBBoxes(out->deprecatedq3data_collisionelement3i, out->num_collisiontriangles, out->deprecatedq3data_collisionvertex3f, &out->deprecatedq3data_collisionbbox6f, &out->deprecatedq3num_collisionbboxstride, mod_q3bsp_curves_collisions_stride.integer);
+                       Mod_Q3BSP_BuildBBoxes(loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle, out->num_triangles, loadmodel->surfmesh.data_vertex3f, &out->deprecatedq3data_bbox6f, &out->deprecatedq3num_bboxstride, mod_q3bsp_curves_stride.integer);
+
+                       // store collision geometry for BIH collision tree
+                       surfacecollisionvertex3f = loadmodel->brush.data_collisionvertex3f + collisionvertices * 3;
+                       surfacecollisionelement3i = loadmodel->brush.data_collisionelement3i + collisiontriangles * 3;
+                       Q3PatchTesselateFloat(3, sizeof(float[3]), surfacecollisionvertex3f, patchsize[0], patchsize[1], sizeof(float[3]), originalvertex3f, cxtess, cytess);
+                       Q3PatchTriangleElements(surfacecollisionelement3i, finalwidth, finalheight, collisionvertices);
+                       Mod_SnapVertices(3, finalvertices, surfacecollisionvertex3f, 1);
+#if 1
+                       // remove this once the legacy code is removed
+                       {
+                               int nc = out->num_collisiontriangles;
+#endif
+                       out->num_collisiontriangles = Mod_RemoveDegenerateTriangles(finaltriangles, surfacecollisionelement3i, surfacecollisionelement3i, loadmodel->brush.data_collisionvertex3f);
+#if 1
+                               if(nc != out->num_collisiontriangles)
+                               {
+                                       Con_Printf("number of collision triangles differs between BIH and BSP. FAIL.\n");
+                               }
+                       }
+#endif
 
                        if (developer_extra.integer)
                                Con_DPrintf("Mod_Q3BSP_LoadFaces: %ix%i curve became %i:%i vertices / %i:%i triangles (%i:%i degenerate)\n", patchsize[0], patchsize[1], out->num_vertices, out->num_collisionvertices, oldnumtriangles, oldnumtriangles2, oldnumtriangles - out->num_triangles, oldnumtriangles2 - out->num_collisiontriangles);
+
+                       collisionvertices += finalvertices;
+                       collisiontriangles += out->num_collisiontriangles;
                        break;
                default:
                        break;
@@ -5197,13 +5540,20 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                if(out->num_vertices && out->num_triangles)
                        continue;
                if(out->num_vertices == 0)
-                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d has no vertices, ignoring\n", i);
-               if(out->num_triangles == 0)
-                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d has no triangles, ignoring\n", i);
+               {
+                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no vertices, ignoring\n", i, out->texture ? out->texture->name : "(none)");
+                       if(out->num_triangles == 0)
+                               Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)");
+               }
+               else if(out->num_triangles == 0)
+                       Con_Printf("Mod_Q3BSP_LoadFaces: surface %d (texture %s, near %f %f %f) has no triangles, ignoring\n", i, out->texture ? out->texture->name : "(none)",
+                                       (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[0 * 3 + 0],
+                                       (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[1 * 3 + 0],
+                                       (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex)[2 * 3 + 0]);
        }
 
        // for per pixel lighting
-       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, true);
+       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
 
        // generate ushort elements array if possible
        if (loadmodel->surfmesh.data_element3s)
@@ -5366,6 +5716,8 @@ static void Mod_Q3BSP_LoadNodes(lump_t *l)
        if (l->filelen % sizeof(*in))
                Host_Error("Mod_Q3BSP_LoadNodes: funny lump size in %s",loadmodel->name);
        count = l->filelen / sizeof(*in);
+       if (count == 0)
+               Host_Error("Mod_Q3BSP_LoadNodes: missing BSP tree in %s",loadmodel->name);
        out = (mnode_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
 
        loadmodel->brush.data_nodes = out;
@@ -5491,11 +5843,27 @@ static void Mod_Q3BSP_LoadPVS(lump_t *l)
 static void Mod_Q3BSP_LightPoint(dp_model_t *model, const vec3_t p, vec3_t ambientcolor, vec3_t diffusecolor, vec3_t diffusenormal)
 {
        int i, j, k, index[3];
-       float transformed[3], blend1, blend2, blend, stylescale;
+       float transformed[3], blend1, blend2, blend, stylescale = 1;
        q3dlightgrid_t *a, *s;
 
        // scale lighting by lightstyle[0] so that darkmode in dpmod works properly
-       stylescale = r_refdef.scene.rtlightstylevalue[0];
+       switch(vid.renderpath)
+       {
+       case RENDERPATH_GL20:
+       case RENDERPATH_D3D9:
+       case RENDERPATH_D3D10:
+       case RENDERPATH_D3D11:
+       case RENDERPATH_SOFT:
+       case RENDERPATH_GLES2:
+               // LordHavoc: FIXME: is this true?
+               stylescale = 1; // added while render
+               break;
+       case RENDERPATH_GL11:
+       case RENDERPATH_GL13:
+       case RENDERPATH_GLES1:
+               stylescale = r_refdef.scene.rtlightstylevalue[0];
+               break;
+       }
 
        if (!model->brushq3.num_lightgrid)
        {
@@ -5631,42 +5999,435 @@ static qboolean Mod_Q3BSP_TraceLineOfSight(struct model_s *model, const vec3_t s
        }
 }
 
-static void Mod_Q3BSP_TracePoint_RecursiveBSPNode(trace_t *trace, dp_model_t *model, mnode_t *node, const vec3_t point, int markframe)
+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 i;
-       mleaf_t *leaf;
-       colbrushf_t *brush;
-       // find which leaf the point is in
-       while (node->plane)
-               node = node->children[(node->plane->type < 3 ? point[node->plane->type] : DotProduct(point, node->plane->normal)) < node->plane->dist];
-       // point trace the brushes
-       leaf = (mleaf_t *)node;
-       for (i = 0;i < leaf->numleafbrushes;i++)
+       const bih_t *bih;
+       const bih_leaf_t *leaf;
+       const bih_node_t *node;
+       const colbrushf_t *brush;
+       int axis;
+       int nodenum;
+       int nodestackpos = 0;
+       int nodestack[1024];
+
+       memset(trace, 0, sizeof(*trace));
+       trace->fraction = 1;
+       trace->realfraction = 1;
+       trace->hitsupercontentsmask = hitsupercontentsmask;
+
+       bih = &model->collision_bih;
+       if(!bih->nodes)
+               return;
+
+       nodenum = bih->rootnode;
+       nodestack[nodestackpos++] = nodenum;
+       while (nodestackpos)
        {
-               brush = model->brush.data_brushes[leaf->firstleafbrush[i]].colbrushf;
-               if (brush && brush->markframe != markframe && BoxesOverlap(point, point, brush->mins, brush->maxs))
+               nodenum = nodestack[--nodestackpos];
+               node = bih->nodes + nodenum;
+#if 1
+               if (!BoxesOverlap(start, start, node->mins, node->maxs))
+                       continue;
+#endif
+               if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
                {
-                       brush->markframe = markframe;
-                       Collision_TracePointBrushFloat(trace, point, brush);
+                       axis = node->type - BIH_SPLITX;
+                       if (start[axis] >= node->frontmin)
+                               nodestack[nodestackpos++] = node->front;
+                       if (start[axis] <= node->backmax)
+                               nodestack[nodestackpos++] = node->back;
+               }
+               else if (node->type == BIH_UNORDERED)
+               {
+                       for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
+                       {
+                               leaf = bih->leafs + node->children[axis];
+#if 1
+                               if (!BoxesOverlap(start, start, leaf->mins, leaf->maxs))
+                                       continue;
+#endif
+                               switch(leaf->type)
+                               {
+                               case BIH_BRUSH:
+                                       brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
+                                       Collision_TracePointBrushFloat(trace, start, brush);
+                                       break;
+                               case BIH_COLLISIONTRIANGLE:
+                                       // collision triangle - skipped because they have no volume
+                                       break;
+                               case BIH_RENDERTRIANGLE:
+                                       // render triangle - skipped because they have no volume
+                                       break;
+                               }
+                       }
                }
        }
-       // can't do point traces on curves (they have no thickness)
 }
 
-static void Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace_t *trace, dp_model_t *model, mnode_t *node, const vec3_t start, const vec3_t end, vec_t startfrac, vec_t endfrac, const vec3_t linestart, const vec3_t lineend, int markframe, const vec3_t segmentmins, const vec3_t segmentmaxs)
+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)
 {
-       int i, startside, endside;
-       float dist1, dist2, midfrac, mid[3], nodesegmentmins[3], nodesegmentmaxs[3];
-       mleaf_t *leaf;
-       msurface_t *surface;
-       mplane_t *plane;
-       colbrushf_t *brush;
-       // walk the tree until we hit a leaf, recursing for any split cases
-       while (node->plane)
+       const bih_leaf_t *leaf;
+       const bih_node_t *node;
+       const colbrushf_t *brush;
+       const int *e;
+       const texture_t *texture;
+       vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
+       vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
+       int axis, nodenum, nodestackpos = 0, nodestack[1024];
+
+       if(!bih->nodes)
+               return;
+
+       if (VectorCompare(start, end))
        {
-               // abort if this part of the bsp tree can not be hit by this trace
-//             if (!(node->combinedsupercontents & trace->hitsupercontentsmask))
-//                     return;
+               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+               return;
+       }
+
+       nodenum = bih->rootnode;
+
+       memset(trace, 0, sizeof(*trace));
+       trace->fraction = 1;
+       trace->realfraction = 1;
+       trace->hitsupercontentsmask = hitsupercontentsmask;
+
+       // push first node
+       nodestackline[nodestackpos][0] = start[0];
+       nodestackline[nodestackpos][1] = start[1];
+       nodestackline[nodestackpos][2] = start[2];
+       nodestackline[nodestackpos][3] = end[0];
+       nodestackline[nodestackpos][4] = end[1];
+       nodestackline[nodestackpos][5] = end[2];
+       nodestack[nodestackpos++] = nodenum;
+       while (nodestackpos)
+       {
+               nodenum = nodestack[--nodestackpos];
+               node = bih->nodes + nodenum;
+               VectorCopy(nodestackline[nodestackpos], nodestart);
+               VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
+               sweepnodemins[0] = min(nodestart[0], nodeend[0]); 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))
+                       continue;
+               if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
+               {
+                       // recurse children of the split
+                       axis = node->type - BIH_SPLITX;
+                       d1 = node->backmax - nodestart[axis];
+                       d2 = node->backmax - nodeend[axis];
+                       d3 = nodestart[axis] - node->frontmin;
+                       d4 = nodeend[axis] - node->frontmin;
+                       switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
+                       {
+                       case  0: /* >>>> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  1: /* <>>> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  2: /* ><>> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  4: /* >><> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  5: /* <><> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  6: /* ><<> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  8: /* >>>< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  9: /* <>>< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 10: /* ><>< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
+                       }
+               }
+               else if (node->type == BIH_UNORDERED)
+               {
+                       // calculate sweep bounds for this node
+                       // copy node bounds into local variables
+                       VectorCopy(node->mins, nodebigmins);
+                       VectorCopy(node->maxs, nodebigmaxs);
+                       // clip line to this node bounds
+                       axis = 0; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       axis = 1; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       axis = 2; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       // some of the line intersected the enlarged node box
+                       // calculate sweep bounds for this node
+                       sweepnodemins[0] = min(nodestart[0], nodeend[0]); 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]);
+                       for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
+                       {
+                               leaf = bih->leafs + node->children[axis];
+                               if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
+                                       continue;
+                               switch(leaf->type)
+                               {
+                               case BIH_BRUSH:
+                                       brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
+                                       Collision_TraceLineBrushFloat(trace, start, end, brush, brush);
+                                       break;
+                               case BIH_COLLISIONTRIANGLE:
+                                       if (!mod_q3bsp_curves_collisions.integer)
+                                               continue;
+                                       e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceLineTriangleFloat(trace, start, end, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               case BIH_RENDERTRIANGLE:
+                                       e = model->surfmesh.data_element3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceLineTriangleFloat(trace, start, end, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               }
+                       }
+               }
+       }
+}
+
+void Mod_CollisionBIH_TraceLine(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask)
+{
+       if (VectorCompare(start, end))
+       {
+               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+               return;
+       }
+       Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, &model->collision_bih);
+}
+
+void Mod_CollisionBIH_TraceBrush(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, colbrushf_t *thisbrush_start, colbrushf_t *thisbrush_end, int hitsupercontentsmask)
+{
+       const bih_t *bih;
+       const bih_leaf_t *leaf;
+       const bih_node_t *node;
+       const colbrushf_t *brush;
+       const int *e;
+       const texture_t *texture;
+       vec3_t start, end, startmins, startmaxs, endmins, endmaxs, mins, maxs;
+       vec3_t nodebigmins, nodebigmaxs, nodestart, nodeend, sweepnodemins, sweepnodemaxs;
+       vec_t d1, d2, d3, d4, f, nodestackline[1024][6];
+       int axis, nodenum, nodestackpos = 0, nodestack[1024];
+
+       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);
+               else
+                       Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, thisbrush_start->mins, thisbrush_end->mins, hitsupercontentsmask);
+               return;
+       }
+
+       bih = &model->collision_bih;
+       if(!bih->nodes)
+               return;
+       nodenum = bih->rootnode;
+
+       // box trace, performed as brush trace
+       memset(trace, 0, sizeof(*trace));
+       trace->fraction = 1;
+       trace->realfraction = 1;
+       trace->hitsupercontentsmask = hitsupercontentsmask;
+
+       // calculate tracebox-like parameters for efficient culling
+       VectorMAM(0.5f, thisbrush_start->mins, 0.5f, thisbrush_start->maxs, start);
+       VectorMAM(0.5f, thisbrush_end->mins, 0.5f, thisbrush_end->maxs, end);
+       VectorSubtract(thisbrush_start->mins, start, startmins);
+       VectorSubtract(thisbrush_start->maxs, start, startmaxs);
+       VectorSubtract(thisbrush_end->mins, end, endmins);
+       VectorSubtract(thisbrush_end->maxs, end, endmaxs);
+       mins[0] = min(startmins[0], endmins[0]);
+       mins[1] = min(startmins[1], endmins[1]);
+       mins[2] = min(startmins[2], endmins[2]);
+       maxs[0] = max(startmaxs[0], endmaxs[0]);
+       maxs[1] = max(startmaxs[1], endmaxs[1]);
+       maxs[2] = max(startmaxs[2], endmaxs[2]);
+
+       // push first node
+       nodestackline[nodestackpos][0] = start[0];
+       nodestackline[nodestackpos][1] = start[1];
+       nodestackline[nodestackpos][2] = start[2];
+       nodestackline[nodestackpos][3] = end[0];
+       nodestackline[nodestackpos][4] = end[1];
+       nodestackline[nodestackpos][5] = end[2];
+       nodestack[nodestackpos++] = nodenum;
+       while (nodestackpos)
+       {
+               nodenum = nodestack[--nodestackpos];
+               node = bih->nodes + nodenum;
+               VectorCopy(nodestackline[nodestackpos], nodestart);
+               VectorCopy(nodestackline[nodestackpos] + 3, nodeend);
+               sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0]; 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];
+               if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, node->mins, node->maxs))
+                       continue;
+               if (node->type <= BIH_SPLITZ && nodestackpos+2 <= 1024)
+               {
+                       // recurse children of the split
+                       axis = node->type - BIH_SPLITX;
+                       d1 = node->backmax - nodestart[axis] - mins[axis];
+                       d2 = node->backmax - nodeend[axis] - mins[axis];
+                       d3 = nodestart[axis] - node->frontmin + maxs[axis];
+                       d4 = nodeend[axis] - node->frontmin + maxs[axis];
+                       switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
+                       {
+                       case  0: /* >>>> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  1: /* <>>> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  2: /* ><>> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  4: /* >><> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  5: /* <><> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  6: /* ><<> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  8: /* >>>< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case  9: /* <>>< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 10: /* ><>< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
+                       case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
+                       case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
+                       }
+               }
+               else if (node->type == BIH_UNORDERED)
+               {
+                       // calculate sweep bounds for this node
+                       // copy node bounds into local variables and expand to get Minkowski Sum of the two shapes
+                       VectorSubtract(node->mins, maxs, nodebigmins);
+                       VectorSubtract(node->maxs, mins, nodebigmaxs);
+                       // clip line to this node bounds
+                       axis = 0; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       axis = 1; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       axis = 2; d1 = nodestart[axis] - nodebigmins[axis]; d2 = nodeend[axis] - nodebigmins[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); } d1 = nodebigmaxs[axis] - nodestart[axis]; d2 = nodebigmaxs[axis] - nodeend[axis]; if (d1 < 0) { if (d2 < 0) continue; f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestart); } else if (d2 < 0) { f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodeend); }
+                       // some of the line intersected the enlarged node box
+                       // calculate sweep bounds for this node
+                       sweepnodemins[0] = min(nodestart[0], nodeend[0]) + mins[0]; 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];
+                       for (axis = 0;axis < BIH_MAXUNORDEREDCHILDREN && node->children[axis] >= 0;axis++)
+                       {
+                               leaf = bih->leafs + node->children[axis];
+                               if (!BoxesOverlap(sweepnodemins, sweepnodemaxs, leaf->mins, leaf->maxs))
+                                       continue;
+                               switch(leaf->type)
+                               {
+                               case BIH_BRUSH:
+                                       brush = model->brush.data_brushes[leaf->itemindex].colbrushf;
+                                       Collision_TraceBrushBrushFloat(trace, thisbrush_start, thisbrush_end, brush, brush);
+                                       break;
+                               case BIH_COLLISIONTRIANGLE:
+                                       if (!mod_q3bsp_curves_collisions.integer)
+                                               continue;
+                                       e = model->brush.data_collisionelement3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->brush.data_collisionvertex3f + e[0] * 3, model->brush.data_collisionvertex3f + e[1] * 3, model->brush.data_collisionvertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               case BIH_RENDERTRIANGLE:
+                                       e = model->surfmesh.data_element3i + 3*leaf->itemindex;
+                                       texture = model->data_textures + leaf->textureindex;
+                                       Collision_TraceBrushTriangleFloat(trace, thisbrush_start, thisbrush_end, model->surfmesh.data_vertex3f + e[0] * 3, model->surfmesh.data_vertex3f + e[1] * 3, model->surfmesh.data_vertex3f + e[2] * 3, texture->supercontents, texture->surfaceflags, texture);
+                                       break;
+                               }
+                       }
+               }
+       }
+}
+
+void Mod_CollisionBIH_TraceBox(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask)
+{
+       colboxbrushf_t thisbrush_start, thisbrush_end;
+       vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
+
+       // box trace, performed as brush trace
+       VectorAdd(start, boxmins, boxstartmins);
+       VectorAdd(start, boxmaxs, boxstartmaxs);
+       VectorAdd(end, boxmins, boxendmins);
+       VectorAdd(end, boxmaxs, boxendmaxs);
+       Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
+       Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
+       Mod_CollisionBIH_TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask);
+}
+
+
+int Mod_CollisionBIH_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
+{
+       trace_t trace;
+       Mod_CollisionBIH_TracePoint(model, NULL, NULL, &trace, point, 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)
+{
+#if 0
+       // broken - needs to be modified to count front faces and backfaces to figure out if it is in solid
+       vec3_t end;
+       int hitsupercontents;
+       VectorSet(end, start[0], start[1], model->normalmins[2]);
+#endif
+       memset(trace, 0, sizeof(*trace));
+       trace->fraction = 1;
+       trace->realfraction = 1;
+       trace->hitsupercontentsmask = hitsupercontentsmask;
+#if 0
+       Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
+       hitsupercontents = trace->hitsupercontents;
+       memset(trace, 0, sizeof(*trace));
+       trace->fraction = 1;
+       trace->realfraction = 1;
+       trace->hitsupercontentsmask = hitsupercontentsmask;
+       trace->startsupercontents = hitsupercontents;
+#endif
+}
+
+int Mod_CollisionBIH_PointSuperContents_Mesh(struct model_s *model, int frame, const vec3_t start)
+{
+#if 0
+       // broken - needs to be modified to count front faces and backfaces to figure out if it is in solid
+       trace_t trace;
+       vec3_t end;
+       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);
+       return trace.hitsupercontents;
+#else
+       return 0;
+#endif
+}
+
+static void Mod_Q3BSP_TracePoint_RecursiveBSPNode(trace_t *trace, dp_model_t *model, mnode_t *node, const vec3_t point, int markframe)
+{
+       int i;
+       mleaf_t *leaf;
+       colbrushf_t *brush;
+       // find which leaf the point is in
+       while (node->plane)
+               node = node->children[(node->plane->type < 3 ? point[node->plane->type] : DotProduct(point, node->plane->normal)) < node->plane->dist];
+       // point trace the brushes
+       leaf = (mleaf_t *)node;
+       for (i = 0;i < leaf->numleafbrushes;i++)
+       {
+               brush = model->brush.data_brushes[leaf->firstleafbrush[i]].colbrushf;
+               if (brush && brush->markframe != markframe && BoxesOverlap(point, point, brush->mins, brush->maxs))
+               {
+                       brush->markframe = markframe;
+                       Collision_TracePointBrushFloat(trace, point, brush);
+               }
+       }
+       // can't do point traces on curves (they have no thickness)
+}
+
+static void Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace_t *trace, dp_model_t *model, mnode_t *node, const vec3_t start, const vec3_t end, vec_t startfrac, vec_t endfrac, const vec3_t linestart, const vec3_t lineend, int markframe, const vec3_t segmentmins, const vec3_t segmentmaxs)
+{
+       int i, startside, endside;
+       float dist1, dist2, midfrac, mid[3], nodesegmentmins[3], nodesegmentmaxs[3];
+       mleaf_t *leaf;
+       msurface_t *surface;
+       mplane_t *plane;
+       colbrushf_t *brush;
+       // walk the tree until we hit a leaf, recursing for any split cases
+       while (node->plane)
+       {
+#if 0
+               if (!BoxesOverlap(segmentmins, segmentmaxs, node->mins, node->maxs))
+                       return;
+               Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, node->children[0], start, end, startfrac, endfrac, linestart, lineend, markframe, segmentmins, segmentmaxs);
+               node = node->children[1];
+#else
+               // abort if this part of the bsp tree can not be hit by this trace
+//             if (!(node->combinedsupercontents & trace->hitsupercontentsmask))
+//                     return;
                plane = node->plane;
                // axial planes are much more common than non-axial, so an optimized
                // axial case pays off here
@@ -5702,6 +6463,7 @@ static void Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace_t *trace, dp_model_t *mod
                                Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, node->children[endside], mid, end, midfrac, endfrac, linestart, lineend, markframe, segmentmins, segmentmaxs);
                        return;
                }
+#endif
        }
        // abort if this part of the bsp tree can not be hit by this trace
 //     if (!(node->combinedsupercontents & trace->hitsupercontentsmask))
@@ -5715,6 +6477,10 @@ static void Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace_t *trace, dp_model_t *mod
        nodesegmentmaxs[2] = max(start[2], end[2]) + 1;
        // line trace the brushes
        leaf = (mleaf_t *)node;
+#if 0
+       if (!BoxesOverlap(segmentmins, segmentmaxs, leaf->mins, leaf->maxs))
+               return;
+#endif
        for (i = 0;i < leaf->numleafbrushes;i++)
        {
                brush = model->brush.data_brushes[leaf->firstleafbrush[i]].colbrushf;
@@ -5731,10 +6497,10 @@ static void Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace_t *trace, dp_model_t *mod
                for (i = 0;i < leaf->numleafsurfaces;i++)
                {
                        surface = model->data_surfaces + leaf->firstleafsurface[i];
-                       if (surface->num_collisiontriangles && surface->collisionmarkframe != markframe && BoxesOverlap(nodesegmentmins, nodesegmentmaxs, surface->mins, surface->maxs))
+                       if (surface->num_collisiontriangles && surface->deprecatedq3collisionmarkframe != markframe && BoxesOverlap(nodesegmentmins, nodesegmentmaxs, surface->mins, surface->maxs))
                        {
-                               surface->collisionmarkframe = markframe;
-                               Collision_TraceLineTriangleMeshFloat(trace, linestart, lineend, surface->num_collisiontriangles, surface->data_collisionelement3i, surface->data_collisionvertex3f, surface->num_collisionbboxstride, surface->data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
+                               surface->deprecatedq3collisionmarkframe = markframe;
+                               Collision_TraceLineTriangleMeshFloat(trace, linestart, lineend, surface->num_collisiontriangles, surface->deprecatedq3data_collisionelement3i, surface->deprecatedq3data_collisionvertex3f, surface->deprecatedq3num_collisionbboxstride, surface->deprecatedq3data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
                        }
                }
        }
@@ -5752,6 +6518,12 @@ static void Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace_t *trace, dp_model_t *mo
        // walk the tree until we hit a leaf, recursing for any split cases
        while (node->plane)
        {
+#if 0
+               if (!BoxesOverlap(segmentmins, segmentmaxs, node->mins, node->maxs))
+                       return;
+               Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace, model, node->children[0], thisbrush_start, thisbrush_end, markframe, segmentmins, segmentmaxs);
+               node = node->children[1];
+#else
                // abort if this part of the bsp tree can not be hit by this trace
 //             if (!(node->combinedsupercontents & trace->hitsupercontentsmask))
 //                     return;
@@ -5786,6 +6558,7 @@ static void Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace_t *trace, dp_model_t *mo
                        return; // ERROR: NAN bounding box!
                // take whichever side the segment box is on
                node = node->children[sides - 1];
+#endif
        }
        // abort if this part of the bsp tree can not be hit by this trace
 //     if (!(node->combinedsupercontents & trace->hitsupercontentsmask))
@@ -5798,6 +6571,10 @@ static void Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace_t *trace, dp_model_t *mo
        nodesegmentmaxs[2] = min(segmentmaxs[2], node->maxs[2] + 1);
        // hit a leaf
        leaf = (mleaf_t *)node;
+#if 0
+       if (!BoxesOverlap(segmentmins, segmentmaxs, leaf->mins, leaf->maxs))
+               return;
+#endif
        for (i = 0;i < leaf->numleafbrushes;i++)
        {
                brush = model->brush.data_brushes[leaf->firstleafbrush[i]].colbrushf;
@@ -5812,15 +6589,16 @@ static void Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace_t *trace, dp_model_t *mo
                for (i = 0;i < leaf->numleafsurfaces;i++)
                {
                        surface = model->data_surfaces + leaf->firstleafsurface[i];
-                       if (surface->num_collisiontriangles && surface->collisionmarkframe != markframe && BoxesOverlap(nodesegmentmins, nodesegmentmaxs, surface->mins, surface->maxs))
+                       if (surface->num_collisiontriangles && surface->deprecatedq3collisionmarkframe != markframe && BoxesOverlap(nodesegmentmins, nodesegmentmaxs, surface->mins, surface->maxs))
                        {
-                               surface->collisionmarkframe = markframe;
-                               Collision_TraceBrushTriangleMeshFloat(trace, thisbrush_start, thisbrush_end, surface->num_collisiontriangles, surface->data_collisionelement3i, surface->data_collisionvertex3f, surface->num_collisionbboxstride, surface->data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
+                               surface->deprecatedq3collisionmarkframe = markframe;
+                               Collision_TraceBrushTriangleMeshFloat(trace, thisbrush_start, thisbrush_end, surface->num_collisiontriangles, surface->deprecatedq3data_collisionelement3i, surface->deprecatedq3data_collisionvertex3f, surface->deprecatedq3num_collisionbboxstride, surface->deprecatedq3data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
                        }
                }
        }
 }
 
+
 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)
@@ -5831,7 +6609,9 @@ static void Mod_Q3BSP_TracePoint(dp_model_t *model, const frameblend_t *frameble
        trace->fraction = 1;
        trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
-       if (model->brush.submodel)
+       if (mod_collision_bih.integer)
+               Mod_CollisionBIH_TracePoint(model, frameblend, skeleton, trace, start, hitsupercontentsmask);
+       else if (model->brush.submodel)
        {
                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
                        if (brush->colbrushf)
@@ -5864,41 +6644,35 @@ static void Mod_Q3BSP_TraceLine(dp_model_t *model, const frameblend_t *frameblen
        segmentmaxs[0] = max(start[0], end[0]) + 1;
        segmentmaxs[1] = max(start[1], end[1]) + 1;
        segmentmaxs[2] = max(start[2], end[2]) + 1;
-       if (model->brush.submodel)
+       if (mod_collision_bih.integer)
+               Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
+       else if (model->brush.submodel)
        {
                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
-                       if (brush->colbrushf)
+                       if (brush->colbrushf && BoxesOverlap(segmentmins, segmentmaxs, brush->colbrushf->mins, brush->colbrushf->maxs))
                                Collision_TraceLineBrushFloat(trace, start, end, brush->colbrushf, brush->colbrushf);
                if (mod_q3bsp_curves_collisions.integer)
                        for (i = 0, surface = model->data_surfaces + model->firstmodelsurface;i < model->nummodelsurfaces;i++, surface++)
-                               if (surface->num_collisiontriangles)
-                                       Collision_TraceLineTriangleMeshFloat(trace, start, end, surface->num_collisiontriangles, surface->data_collisionelement3i, surface->data_collisionvertex3f, surface->num_collisionbboxstride, surface->data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
+                               if (surface->num_collisiontriangles && BoxesOverlap(segmentmins, segmentmaxs, surface->mins, surface->maxs))
+                                       Collision_TraceLineTriangleMeshFloat(trace, start, end, surface->num_collisiontriangles, surface->deprecatedq3data_collisionelement3i, surface->deprecatedq3data_collisionvertex3f, surface->deprecatedq3num_collisionbboxstride, surface->deprecatedq3data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
        }
        else
                Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, model->brush.data_nodes, start, end, 0, 1, start, end, ++markframe, segmentmins, segmentmaxs);
 }
 
-static void Mod_Q3BSP_TraceBox(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask)
+void Mod_Q3BSP_TraceBrush(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, colbrushf_t *start, colbrushf_t *end, int hitsupercontentsmask)
 {
-       int i;
        float segmentmins[3], segmentmaxs[3];
+       int i;
        msurface_t *surface;
        q3mbrush_t *brush;
-       colboxbrushf_t thisbrush_start, thisbrush_end;
-       vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
 
-       if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(boxmins, boxmaxs))
+       if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(start->mins, start->maxs) && VectorCompare(end->mins, end->maxs))
        {
-               vec3_t shiftstart, shiftend;
-               VectorAdd(start, boxmins, shiftstart);
-               VectorAdd(end, boxmins, shiftend);
-               if (VectorCompare(start, end))
-                       Mod_Q3BSP_TracePoint(model, frameblend, skeleton, trace, shiftstart, hitsupercontentsmask);
+               if (VectorCompare(start->mins, end->mins))
+                       Mod_Q3BSP_TracePoint(model, frameblend, skeleton, trace, start->mins, hitsupercontentsmask);
                else
-               {
-                       Mod_Q3BSP_TraceLine(model, frameblend, skeleton, trace, shiftstart, shiftend, hitsupercontentsmask);
-                       VectorSubtract(trace->endpos, boxmins, trace->endpos);
-               }
+                       Mod_Q3BSP_TraceLine(model, frameblend, skeleton, trace, start->mins, end->mins, hitsupercontentsmask);
                return;
        }
 
@@ -5907,30 +6681,41 @@ static void Mod_Q3BSP_TraceBox(dp_model_t *model, const frameblend_t *frameblend
        trace->fraction = 1;
        trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
-       segmentmins[0] = min(start[0], end[0]) + boxmins[0] - 1;
-       segmentmins[1] = min(start[1], end[1]) + boxmins[1] - 1;
-       segmentmins[2] = min(start[2], end[2]) + boxmins[2] - 1;
-       segmentmaxs[0] = max(start[0], end[0]) + boxmaxs[0] + 1;
-       segmentmaxs[1] = max(start[1], end[1]) + boxmaxs[1] + 1;
-       segmentmaxs[2] = max(start[2], end[2]) + boxmaxs[2] + 1;
-       VectorAdd(start, boxmins, boxstartmins);
-       VectorAdd(start, boxmaxs, boxstartmaxs);
-       VectorAdd(end, boxmins, boxendmins);
-       VectorAdd(end, boxmaxs, boxendmaxs);
-       Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
-       Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
-       if (model->brush.submodel)
+       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]);
+       if (mod_collision_bih.integer)
+               Mod_CollisionBIH_TraceBrush(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask);
+       else if (model->brush.submodel)
        {
                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
-                       if (brush->colbrushf)
-                               Collision_TraceBrushBrushFloat(trace, &thisbrush_start.brush, &thisbrush_end.brush, brush->colbrushf, brush->colbrushf);
+                       if (brush->colbrushf && BoxesOverlap(segmentmins, segmentmaxs, brush->colbrushf->mins, brush->colbrushf->maxs))
+                               Collision_TraceBrushBrushFloat(trace, start, end, brush->colbrushf, brush->colbrushf);
                if (mod_q3bsp_curves_collisions.integer)
                        for (i = 0, surface = model->data_surfaces + model->firstmodelsurface;i < model->nummodelsurfaces;i++, surface++)
-                               if (surface->num_collisiontriangles)
-                                       Collision_TraceBrushTriangleMeshFloat(trace, &thisbrush_start.brush, &thisbrush_end.brush, surface->num_collisiontriangles, surface->data_collisionelement3i, surface->data_collisionvertex3f, surface->num_collisionbboxstride, surface->data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
+                               if (surface->num_collisiontriangles && BoxesOverlap(segmentmins, segmentmaxs, surface->mins, surface->maxs))
+                                       Collision_TraceBrushTriangleMeshFloat(trace, start, end, surface->num_collisiontriangles, surface->deprecatedq3data_collisionelement3i, surface->deprecatedq3data_collisionvertex3f, surface->deprecatedq3num_collisionbboxstride, surface->deprecatedq3data_collisionbbox6f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
        }
        else
-               Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace, model, model->brush.data_nodes, &thisbrush_start.brush, &thisbrush_end.brush, ++markframe, segmentmins, segmentmaxs);
+               Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace, model, model->brush.data_nodes, start, end, ++markframe, segmentmins, segmentmaxs);
+}
+
+static void Mod_Q3BSP_TraceBox(dp_model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask)
+{
+       colboxbrushf_t thisbrush_start, thisbrush_end;
+       vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
+
+       // box trace, performed as brush trace
+       VectorAdd(start, boxmins, boxstartmins);
+       VectorAdd(start, boxmaxs, boxstartmaxs);
+       VectorAdd(end, boxmins, boxendmins);
+       VectorAdd(end, boxmaxs, boxendmaxs);
+       Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
+       Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
+       Mod_Q3BSP_TraceBrush(model, frameblend, skeleton, trace, &thisbrush_start.brush, &thisbrush_end.brush, hitsupercontentsmask);
 }
 
 static int Mod_Q3BSP_PointSuperContents(struct model_s *model, int frame, const vec3_t point)
@@ -5938,8 +6723,14 @@ static int Mod_Q3BSP_PointSuperContents(struct model_s *model, int frame, const
        int i;
        int supercontents = 0;
        q3mbrush_t *brush;
+       if (mod_collision_bih.integer)
+       {
+               trace_t trace;
+               Mod_Q3BSP_TracePoint(model, NULL, NULL, &trace, point, 0);
+               supercontents = trace.startsupercontents;
+       }
        // test if the point is inside each brush
-       if (model->brush.submodel)
+       else if (model->brush.submodel)
        {
                // submodels are effectively one leaf
                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
@@ -5965,6 +6756,147 @@ 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)
+{
+       Mod_CollisionBIH_TraceLineShared(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, &model->render_bih);
+}
+
+
+bih_t *Mod_MakeCollisionBIH(dp_model_t *model, qboolean userendersurfaces, bih_t *out)
+{
+       int j;
+       int bihnumleafs;
+       int bihmaxnodes;
+       int brushindex;
+       int triangleindex;
+       int bihleafindex;
+       int nummodelbrushes = model->nummodelbrushes;
+       int nummodelsurfaces = model->nummodelsurfaces;
+       const int *e;
+       const int *collisionelement3i;
+       const float *collisionvertex3f;
+       const int *renderelement3i;
+       const float *rendervertex3f;
+       bih_leaf_t *bihleafs;
+       bih_node_t *bihnodes;
+       int *temp_leafsort;
+       int *temp_leafsortscratch;
+       const msurface_t *surface;
+       const q3mbrush_t *brush;
+
+       // find out how many BIH leaf nodes we need
+       bihnumleafs = 0;
+       if (userendersurfaces)
+       {
+               for (j = 0, surface = model->data_surfaces + model->firstmodelsurface;j < nummodelsurfaces;j++, surface++)
+                       bihnumleafs += surface->num_triangles;
+       }
+       else
+       {
+               for (brushindex = 0, brush = model->brush.data_brushes + brushindex+model->firstmodelbrush;brushindex < nummodelbrushes;brushindex++, brush++)
+                       if (brush->colbrushf)
+                               bihnumleafs++;
+               for (j = 0, surface = model->data_surfaces + model->firstmodelsurface;j < nummodelsurfaces;j++, surface++)
+               {
+                       if (surface->texture->basematerialflags & MATERIALFLAG_MESHCOLLISIONS)
+                               bihnumleafs += surface->num_triangles + surface->num_collisiontriangles;
+                       else
+                               bihnumleafs += surface->num_collisiontriangles;
+               }
+       }
+
+       if (!bihnumleafs)
+               return NULL;
+
+       // allocate the memory for the BIH leaf nodes
+       bihleafs = (bih_leaf_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_leaf_t) * bihnumleafs);
+
+       // now populate the BIH leaf nodes
+       bihleafindex = 0;
+
+       // add render surfaces
+       renderelement3i = model->surfmesh.data_element3i;
+       rendervertex3f = model->surfmesh.data_vertex3f;
+       for (j = 0, surface = model->data_surfaces + model->firstmodelsurface;j < nummodelsurfaces;j++, surface++)
+       {
+               for (triangleindex = 0, e = renderelement3i + 3*surface->num_firsttriangle;triangleindex < surface->num_triangles;triangleindex++, e += 3)
+               {
+                       if (!userendersurfaces && !(surface->texture->basematerialflags & MATERIALFLAG_MESHCOLLISIONS))
+                               continue;
+                       bihleafs[bihleafindex].type = BIH_RENDERTRIANGLE;
+                       bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
+                       bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
+                       bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firsttriangle;
+                       bihleafs[bihleafindex].mins[0] = min(rendervertex3f[3*e[0]+0], min(rendervertex3f[3*e[1]+0], rendervertex3f[3*e[2]+0])) - 1;
+                       bihleafs[bihleafindex].mins[1] = min(rendervertex3f[3*e[0]+1], min(rendervertex3f[3*e[1]+1], rendervertex3f[3*e[2]+1])) - 1;
+                       bihleafs[bihleafindex].mins[2] = min(rendervertex3f[3*e[0]+2], min(rendervertex3f[3*e[1]+2], rendervertex3f[3*e[2]+2])) - 1;
+                       bihleafs[bihleafindex].maxs[0] = max(rendervertex3f[3*e[0]+0], max(rendervertex3f[3*e[1]+0], rendervertex3f[3*e[2]+0])) + 1;
+                       bihleafs[bihleafindex].maxs[1] = max(rendervertex3f[3*e[0]+1], max(rendervertex3f[3*e[1]+1], rendervertex3f[3*e[2]+1])) + 1;
+                       bihleafs[bihleafindex].maxs[2] = max(rendervertex3f[3*e[0]+2], max(rendervertex3f[3*e[1]+2], rendervertex3f[3*e[2]+2])) + 1;
+                       bihleafindex++;
+               }
+       }
+
+       if (!userendersurfaces)
+       {
+               // add collision brushes
+               for (brushindex = 0, brush = model->brush.data_brushes + brushindex+model->firstmodelbrush;brushindex < nummodelbrushes;brushindex++, brush++)
+               {
+                       if (!brush->colbrushf)
+                               continue;
+                       bihleafs[bihleafindex].type = BIH_BRUSH;
+                       bihleafs[bihleafindex].textureindex = brush->texture - model->data_textures;
+                       bihleafs[bihleafindex].surfaceindex = -1;
+                       bihleafs[bihleafindex].itemindex = brushindex+model->firstmodelbrush;
+                       VectorCopy(brush->colbrushf->mins, bihleafs[bihleafindex].mins);
+                       VectorCopy(brush->colbrushf->maxs, bihleafs[bihleafindex].maxs);
+                       bihleafindex++;
+               }
+
+               // add collision surfaces
+               collisionelement3i = model->brush.data_collisionelement3i;
+               collisionvertex3f = model->brush.data_collisionvertex3f;
+               for (j = 0, surface = model->data_surfaces + model->firstmodelsurface;j < nummodelsurfaces;j++, surface++)
+               {
+                       for (triangleindex = 0, e = collisionelement3i + 3*surface->num_firstcollisiontriangle;triangleindex < surface->num_collisiontriangles;triangleindex++, e += 3)
+                       {
+                               bihleafs[bihleafindex].type = BIH_COLLISIONTRIANGLE;
+                               bihleafs[bihleafindex].textureindex = surface->texture - model->data_textures;
+                               bihleafs[bihleafindex].surfaceindex = surface - model->data_surfaces;
+                               bihleafs[bihleafindex].itemindex = triangleindex+surface->num_firstcollisiontriangle;
+                               bihleafs[bihleafindex].mins[0] = min(collisionvertex3f[3*e[0]+0], min(collisionvertex3f[3*e[1]+0], collisionvertex3f[3*e[2]+0])) - 1;
+                               bihleafs[bihleafindex].mins[1] = min(collisionvertex3f[3*e[0]+1], min(collisionvertex3f[3*e[1]+1], collisionvertex3f[3*e[2]+1])) - 1;
+                               bihleafs[bihleafindex].mins[2] = min(collisionvertex3f[3*e[0]+2], min(collisionvertex3f[3*e[1]+2], collisionvertex3f[3*e[2]+2])) - 1;
+                               bihleafs[bihleafindex].maxs[0] = max(collisionvertex3f[3*e[0]+0], max(collisionvertex3f[3*e[1]+0], collisionvertex3f[3*e[2]+0])) + 1;
+                               bihleafs[bihleafindex].maxs[1] = max(collisionvertex3f[3*e[0]+1], max(collisionvertex3f[3*e[1]+1], collisionvertex3f[3*e[2]+1])) + 1;
+                               bihleafs[bihleafindex].maxs[2] = max(collisionvertex3f[3*e[0]+2], max(collisionvertex3f[3*e[1]+2], collisionvertex3f[3*e[2]+2])) + 1;
+                               bihleafindex++;
+                       }
+               }
+       }
+
+       // allocate buffers for the produced and temporary data
+       bihmaxnodes = bihnumleafs + 1;
+       bihnodes = (bih_node_t *)Mem_Alloc(loadmodel->mempool, sizeof(bih_node_t) * bihmaxnodes);
+       temp_leafsort = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * bihnumleafs * 2);
+       temp_leafsortscratch = temp_leafsort + bihnumleafs;
+
+       // now build it
+       BIH_Build(out, bihnumleafs, bihleafs, bihmaxnodes, bihnodes, temp_leafsort, temp_leafsortscratch);
+
+       // we're done with the temporary data
+       Mem_Free(temp_leafsort);
+
+       // resize the BIH nodes array if it over-allocated
+       if (out->maxnodes > out->numnodes)
+       {
+               out->maxnodes = out->numnodes;
+               out->nodes = (bih_node_t *)Mem_Realloc(loadmodel->mempool, out->nodes, out->numnodes * sizeof(bih_node_t));
+       }
+
+       return out;
+}
+
 static int Mod_Q3BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativecontents)
 {
        int supercontents = 0;
@@ -6040,10 +6972,9 @@ void Mod_Q3BSP_RecursiveFindNumLeafs(mnode_t *node)
 
 void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
-       int i, j, numshadowmeshtriangles, lumps;
+       int i, j, lumps;
        q3dheader_t *header;
        float corner[3], yawradius, modelradius;
-       msurface_t *surface;
 
        mod->modeldatatypestring = "Q3BSP";
 
@@ -6061,9 +6992,11 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 
        mod->soundfromcenter = true;
        mod->TraceBox = Mod_Q3BSP_TraceBox;
+       mod->TraceBrush = Mod_Q3BSP_TraceBrush;
        mod->TraceLine = Mod_Q3BSP_TraceLine;
        mod->TracePoint = Mod_Q3BSP_TracePoint;
        mod->PointSuperContents = Mod_Q3BSP_PointSuperContents;
+       mod->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
        mod->brush.TraceLineOfSight = Mod_Q3BSP_TraceLineOfSight;
        mod->brush.SuperContentsFromNativeContents = Mod_Q3BSP_SuperContentsFromNativeContents;
        mod->brush.NativeContentsFromSuperContents = Mod_Q3BSP_NativeContentsFromSuperContents;
@@ -6155,27 +7088,14 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        loadmodel->brush.numsubmodels = loadmodel->brushq3.num_models;
 
        // the MakePortals code works fine on the q3bsp data as well
-       Mod_Q1BSP_MakePortals();
+       if (mod_bsp_portalize.integer)
+               Mod_Q1BSP_MakePortals();
 
        // FIXME: shader alpha should replace r_wateralpha support in q3bsp
        loadmodel->brush.supportwateralpha = true;
 
        // make a single combined shadow mesh to allow optimized shadow volume creation
-       numshadowmeshtriangles = 0;
-       if (cls.state != ca_dedicated)
-       {
-               for (j = 0, surface = loadmodel->data_surfaces;j < loadmodel->num_surfaces;j++, surface++)
-               {
-                       surface->num_firstshadowmeshtriangle = numshadowmeshtriangles;
-                       numshadowmeshtriangles += surface->num_triangles;
-               }
-               loadmodel->brush.shadowmesh = Mod_ShadowMesh_Begin(loadmodel->mempool, numshadowmeshtriangles * 3, numshadowmeshtriangles, NULL, NULL, NULL, false, false, true);
-               for (j = 0, surface = loadmodel->data_surfaces;j < loadmodel->num_surfaces;j++, surface++)
-                       if (surface->num_triangles > 0)
-                               Mod_ShadowMesh_AddMesh(loadmodel->mempool, loadmodel->brush.shadowmesh, NULL, NULL, NULL, loadmodel->surfmesh.data_vertex3f, NULL, NULL, NULL, NULL, surface->num_triangles, (loadmodel->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
-               loadmodel->brush.shadowmesh = Mod_ShadowMesh_Finish(loadmodel->mempool, loadmodel->brush.shadowmesh, false, true, false);
-               Mod_BuildTriangleNeighbors(loadmodel->brush.shadowmesh->neighbor3i, loadmodel->brush.shadowmesh->element3i, loadmodel->brush.shadowmesh->numtriangles);
-       }
+       Mod_Q1BSP_CreateShadowMesh(loadmodel);
 
        loadmodel->brush.num_leafs = 0;
        Mod_Q3BSP_RecursiveFindNumLeafs(loadmodel->brush.data_nodes);
@@ -6272,11 +7192,14 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                        mod->DrawSky = R_Q1BSP_DrawSky;
 
                for (j = 0;j < mod->nummodelsurfaces;j++)
-                       if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION))
+                       if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA))
                                break;
                if (j < mod->nummodelsurfaces)
                        mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
 
+               Mod_MakeCollisionBIH(mod, false, &mod->collision_bih);
+               Mod_MakeCollisionBIH(mod, true, &mod->render_bih);
+
                // generate VBOs and other shared data before cloning submodels
                if (i == 0)
                        Mod_BuildVBOs();
@@ -6301,12 +7224,10 @@ void Mod_MAP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        Host_Error("Mod_MAP_Load: not yet implemented");
 }
 
-#define OBJASMODEL
-
-#ifdef OBJASMODEL
 typedef struct objvertex_s
 {
        int nextindex;
+       int submodelindex;
        int textureindex;
        float v[3];
        float vt[2];
@@ -6314,6 +7235,8 @@ typedef struct objvertex_s
 }
 objvertex_t;
 
+static unsigned char nobsp_pvs[1] = {1};
+
 void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
        const char *textbase = (char *)buffer, *text = textbase;
@@ -6321,7 +7244,7 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        char *argv[512];
        char line[1024];
        char materialname[MAX_QPATH];
-       int i, j, numvertices, firstvertex, firsttriangle, elementindex, vertexindex, numsurfaces, surfacevertices, surfacetriangles, surfaceelements;
+       int i, j, l, numvertices, firstvertex, firsttriangle, elementindex, vertexindex, surfacevertices, surfacetriangles, surfaceelements, submodelindex = 0;
        int index1, index2, index3;
        objvertex_t vfirst, vprev, vcurrent;
        int argc;
@@ -6335,12 +7258,13 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        int maxvt = 0, numvt = 1;
        int maxvn = 0, numvn = 1;
        char *texturenames = NULL;
-       float dist, modelradius, modelyawradius;
+       float dist, modelradius, modelyawradius, yawradius;
        float *v = NULL;
        float *vt = NULL;
        float *vn = NULL;
        float mins[3];
        float maxs[3];
+       float corner[3];
        objvertex_t *thisvertex = NULL;
        int vertexhashindex;
        int *vertexhashtable = NULL;
@@ -6350,6 +7274,9 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        int vertexhashcount = 0;
        skinfile_t *skinfiles = NULL;
        unsigned char *data = NULL;
+       int *submodelfirstsurface;
+       msurface_t *surface;
+       msurface_t *tempsurfaces;
 
        memset(&vfirst, 0, sizeof(vfirst));
        memset(&vprev, 0, sizeof(vprev));
@@ -6361,10 +7288,12 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
 
        loadmodel->type = mod_obj;
        loadmodel->soundfromcenter = true;
-       loadmodel->TraceBox = NULL;
-       loadmodel->TraceLine = NULL;
-       loadmodel->TracePoint = NULL;
-       loadmodel->PointSuperContents = NULL;
+       loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
+       loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
+       loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
+       loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
+       loadmodel->TraceLineAgainstSurfaces = Mod_CollisionBIH_TraceLine;
+       loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
        loadmodel->brush.TraceLineOfSight = NULL;
        loadmodel->brush.SuperContentsFromNativeContents = NULL;
        loadmodel->brush.NativeContentsFromSuperContents = NULL;
@@ -6407,9 +7336,13 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        VectorClear(mins);
        VectorClear(maxs);
 
+       // we always have model 0, i.e. the first "submodel"
+       loadmodel->brush.numsubmodels = 1;
+
        // parse the OBJ text now
        for(;;)
        {
+               static char emptyarg[1] = "";
                if (!*text)
                        break;
                linenumber++;
@@ -6418,7 +7351,7 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                        line[linelen] = text[linelen];
                line[linelen] = 0;
                for (argc = 0;argc < 4;argc++)
-                       argv[argc] = "";
+                       argv[argc] = emptyarg;
                argc = 0;
                s = line;
                while (*s == ' ' || *s == '\t')
@@ -6514,9 +7447,13 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                                        index3 = numvn - index3;
                                vcurrent.nextindex = -1;
                                vcurrent.textureindex = textureindex;
-                               VectorCopy(v + 3*index1, vcurrent.v);
-                               Vector2Copy(vt + 2*index2, vcurrent.vt);
-                               VectorCopy(vn + 3*index3, vcurrent.vn);
+                               vcurrent.submodelindex = submodelindex;
+                               if (v && index1 >= 0 && index1 < numv)
+                                       VectorCopy(v + 3*index1, vcurrent.v);
+                               if (vt && index2 >= 0 && index2 < numvt)
+                                       Vector2Copy(vt + 2*index2, vcurrent.vt);
+                               if (vn && index3 >= 0 && index3 < numvn)
+                                       VectorCopy(vn + 3*index3, vcurrent.vn);
                                if (numtriangles == 0)
                                {
                                        VectorCopy(vcurrent.v, mins);
@@ -6549,7 +7486,10 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                        }
                }
                else if (!strcmp(argv[0], "o") || !strcmp(argv[0], "g"))
-                       ;
+               {
+                       submodelindex = atof(argv[1]);
+                       loadmodel->brush.numsubmodels = max(submodelindex + 1, loadmodel->brush.numsubmodels);
+               }
                else if (!strcmp(argv[0], "usemtl"))
                {
                        for (i = 0;i < numtextures;i++)
@@ -6592,78 +7532,107 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        loadmodel->radius2 = modelradius * modelradius;
 
        // allocate storage for triangles
-       loadmodel->num_surfaces = loadmodel->nummodelsurfaces = numsurfaces = numtextures;
-       loadmodel->surfmesh.data_element3i = Mem_Alloc(loadmodel->mempool, numtriangles * sizeof(int[3]));
-       loadmodel->data_surfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(msurface_t));
+       loadmodel->surfmesh.data_element3i = (int *)Mem_Alloc(loadmodel->mempool, numtriangles * sizeof(int[3]));
        // allocate vertex hash structures to build an optimal vertex subset
        vertexhashsize = numtriangles*2;
-       vertexhashtable = Mem_Alloc(loadmodel->mempool, sizeof(int) * vertexhashsize);
+       vertexhashtable = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int) * vertexhashsize);
        memset(vertexhashtable, 0xFF, sizeof(int) * vertexhashsize);
-       vertexhashdata = Mem_Alloc(loadmodel->mempool, sizeof(*vertexhashdata) * numtriangles*3);
+       vertexhashdata = (objvertex_t *)Mem_Alloc(loadmodel->mempool, sizeof(*vertexhashdata) * numtriangles*3);
        vertexhashcount = 0;
 
        // gather surface stats for assigning vertex/triangle ranges
        firstvertex = 0;
        firsttriangle = 0;
        elementindex = 0;
-       for (textureindex = 0;textureindex < numtextures;textureindex++)
+       loadmodel->num_surfaces = 0;
+       // allocate storage for the worst case number of surfaces, later we resize
+       tempsurfaces = (msurface_t *)Mem_Alloc(loadmodel->mempool, numtextures * loadmodel->brush.numsubmodels * sizeof(msurface_t));
+       submodelfirstsurface = (int *)Mem_Alloc(loadmodel->mempool, (loadmodel->brush.numsubmodels+1) * sizeof(int));
+       surface = tempsurfaces;
+       for (submodelindex = 0;submodelindex < loadmodel->brush.numsubmodels;submodelindex++)
        {
-               msurface_t *surface = loadmodel->data_surfaces + textureindex;
-               // copy the mins/maxs of the model backwards so that the first vertex
-               // added will set the surface bounds to a point
-               VectorCopy(loadmodel->normalmaxs, surface->mins);
-               VectorCopy(loadmodel->normalmins, surface->maxs);
-               surfacevertices = 0;
-               surfaceelements = 0;
-               for (vertexindex = 0;vertexindex < numtriangles*3;vertexindex++)
-               {
-                       thisvertex = vertices + vertexindex;
-                       if (thisvertex->textureindex != textureindex)
-                               continue;
-                       surface->mins[0] = min(surface->mins[0], thisvertex->v[0]);
-                       surface->mins[1] = min(surface->mins[1], thisvertex->v[1]);
-                       surface->mins[2] = min(surface->mins[2], thisvertex->v[2]);
-                       surface->maxs[0] = max(surface->maxs[0], thisvertex->v[0]);
-                       surface->maxs[1] = max(surface->maxs[1], thisvertex->v[1]);
-                       surface->maxs[2] = max(surface->maxs[2], thisvertex->v[2]);
-                       vertexhashindex = (unsigned int)(thisvertex->v[0] * 3571 + thisvertex->v[0] * 1777 + thisvertex->v[0] * 457) % (unsigned int)vertexhashsize;
-                       for (i = vertexhashtable[vertexhashindex];i >= 0;i = vertexhashdata[i].nextindex)
+               submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
+               for (textureindex = 0;textureindex < numtextures;textureindex++)
+               {
+                       for (vertexindex = 0;vertexindex < numtriangles*3;vertexindex++)
                        {
-                               vdata = vertexhashdata + i;
-                               if (vdata->textureindex == thisvertex->textureindex && VectorCompare(thisvertex->v, vdata->v) && VectorCompare(thisvertex->vn, vdata->vn) && Vector2Compare(thisvertex->vt, vdata->vt))
+                               thisvertex = vertices + vertexindex;
+                               if (thisvertex->submodelindex == submodelindex && thisvertex->textureindex == textureindex)
                                        break;
                        }
-                       if (i < 0)
+                       // skip the surface creation if there are no triangles for it
+                       if (vertexindex == numtriangles*3)
+                               continue;
+                       // create a surface for these vertices
+                       surfacevertices = 0;
+                       surfaceelements = 0;
+                       // we hack in a texture index in the surface to be fixed up later...
+                       surface->texture = (texture_t *)((size_t)textureindex);
+                       // calculate bounds as we go
+                       VectorCopy(thisvertex->v, surface->mins);
+                       VectorCopy(thisvertex->v, surface->maxs);
+                       for (;vertexindex < numtriangles*3;vertexindex++)
                        {
-                               i = vertexhashcount++;
-                               vdata = vertexhashdata + i;
-                               *vdata = *thisvertex;
-                               vdata->nextindex = vertexhashtable[vertexhashindex];
-                               vertexhashtable[vertexhashindex] = i;
-                               surfacevertices++;
-                       }
-                       loadmodel->surfmesh.data_element3i[elementindex++] = i;
-                       surfaceelements++;
-               }
-               surfacetriangles = surfaceelements / 3;
-               surface->num_vertices = surfacevertices;
-               surface->num_triangles = surfacetriangles;
-               surface->num_firstvertex = firstvertex;
-               surface->num_firsttriangle = firsttriangle;
-               firstvertex += surface->num_vertices;
-               firsttriangle += surface->num_triangles;
-       }
+                               thisvertex = vertices + vertexindex;
+                               if (thisvertex->submodelindex != submodelindex)
+                                       continue;
+                               if (thisvertex->textureindex != textureindex)
+                                       continue;
+                               // add vertex to surface bounds
+                               surface->mins[0] = min(surface->mins[0], thisvertex->v[0]);
+                               surface->mins[1] = min(surface->mins[1], thisvertex->v[1]);
+                               surface->mins[2] = min(surface->mins[2], thisvertex->v[2]);
+                               surface->maxs[0] = max(surface->maxs[0], thisvertex->v[0]);
+                               surface->maxs[1] = max(surface->maxs[1], thisvertex->v[1]);
+                               surface->maxs[2] = max(surface->maxs[2], thisvertex->v[2]);
+                               // add the vertex if it is not found in the merged set, and
+                               // get its index (triangle element) for the surface
+                               vertexhashindex = (unsigned int)(thisvertex->v[0] * 3571 + thisvertex->v[0] * 1777 + thisvertex->v[0] * 457) % (unsigned int)vertexhashsize;
+                               for (i = vertexhashtable[vertexhashindex];i >= 0;i = vertexhashdata[i].nextindex)
+                               {
+                                       vdata = vertexhashdata + i;
+                                       if (vdata->submodelindex == thisvertex->submodelindex && vdata->textureindex == thisvertex->textureindex && VectorCompare(thisvertex->v, vdata->v) && VectorCompare(thisvertex->vn, vdata->vn) && Vector2Compare(thisvertex->vt, vdata->vt))
+                                               break;
+                               }
+                               if (i < 0)
+                               {
+                                       i = vertexhashcount++;
+                                       vdata = vertexhashdata + i;
+                                       *vdata = *thisvertex;
+                                       vdata->nextindex = vertexhashtable[vertexhashindex];
+                                       vertexhashtable[vertexhashindex] = i;
+                                       surfacevertices++;
+                               }
+                               loadmodel->surfmesh.data_element3i[elementindex++] = i;
+                               surfaceelements++;
+                       }
+                       surfacetriangles = surfaceelements / 3;
+                       surface->num_vertices = surfacevertices;
+                       surface->num_triangles = surfacetriangles;
+                       surface->num_firstvertex = firstvertex;
+                       surface->num_firsttriangle = firsttriangle;
+                       firstvertex += surface->num_vertices;
+                       firsttriangle += surface->num_triangles;
+                       surface++;
+                       loadmodel->num_surfaces++;
+               }
+       }
+       submodelfirstsurface[submodelindex] = loadmodel->num_surfaces;
        numvertices = firstvertex;
+       loadmodel->data_surfaces = (msurface_t *)Mem_Realloc(loadmodel->mempool, tempsurfaces, loadmodel->num_surfaces * sizeof(msurface_t));
+       tempsurfaces = NULL;
 
        // allocate storage for final mesh data
        loadmodel->num_textures = numtextures * loadmodel->numskins;
        loadmodel->num_texturesperskin = numtextures;
-       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, numsurfaces * sizeof(int) + numsurfaces * loadmodel->numskins * sizeof(texture_t) + numtriangles * sizeof(int[3]) + (numvertices <= 65536 ? numtriangles * sizeof(unsigned short[3]) : 0) + numvertices * sizeof(float[14]));
-       loadmodel->sortedmodelsurfaces = (int *)data;data += numsurfaces * sizeof(int);
-       loadmodel->data_textures = (texture_t *)data;data += numsurfaces * loadmodel->numskins * sizeof(texture_t);
+       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(int) + loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t) + numtriangles * sizeof(int[3]) + (numvertices <= 65536 ? numtriangles * sizeof(unsigned short[3]) : 0) + (r_enableshadowvolumes.integer ? numtriangles * sizeof(int[3]) : 0) + numvertices * sizeof(float[14]) + loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
+       loadmodel->brush.submodels = (dp_model_t **)data;data += loadmodel->brush.numsubmodels * sizeof(dp_model_t *);
+       loadmodel->sortedmodelsurfaces = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
+       loadmodel->data_textures = (texture_t *)data;data += loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t);
        loadmodel->surfmesh.num_vertices = numvertices;
        loadmodel->surfmesh.num_triangles = numtriangles;
-       loadmodel->surfmesh.data_neighbor3i = (int *)data;data += numtriangles * sizeof(int[3]);
+       if (r_enableshadowvolumes.integer)
+               loadmodel->surfmesh.data_neighbor3i = (int *)data;data += numtriangles * sizeof(int[3]);
        loadmodel->surfmesh.data_vertex3f = (float *)data;data += numvertices * sizeof(float[3]);
        loadmodel->surfmesh.data_svector3f = (float *)data;data += numvertices * sizeof(float[3]);
        loadmodel->surfmesh.data_tvector3f = (float *)data;data += numvertices * sizeof(float[3]);
@@ -6676,7 +7645,7 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        {
                VectorCopy(vertexhashdata[j].v, loadmodel->surfmesh.data_vertex3f + 3*j);
                VectorCopy(vertexhashdata[j].vn, loadmodel->surfmesh.data_normal3f + 3*j);
-               VectorCopy(vertexhashdata[j].vt, loadmodel->surfmesh.data_texcoordtexture2f + 2*j);
+               Vector2Copy(vertexhashdata[j].vt, loadmodel->surfmesh.data_texcoordtexture2f + 2*j);
        }
 
        // load the textures
@@ -6684,12 +7653,9 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
                Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures + textureindex, skinfiles, texturenames + textureindex*MAX_QPATH, texturenames + textureindex*MAX_QPATH);
        Mod_FreeSkinFiles(skinfiles);
 
-       // set the surface textures
-       for (textureindex = 0;textureindex < numtextures;textureindex++)
-       {
-               msurface_t *surface = loadmodel->data_surfaces + textureindex;
-               surface->texture = loadmodel->data_textures + textureindex;
-       }
+       // set the surface textures to their real values now that we loaded them...
+       for (i = 0;i < loadmodel->num_surfaces;i++)
+               loadmodel->data_surfaces[i].texture = loadmodel->data_textures + (size_t)loadmodel->data_surfaces[i].texture;
 
        // free data
        Mem_Free(vertices);
@@ -6700,951 +7666,154 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
        Mem_Free(vertexhashtable);
        Mem_Free(vertexhashdata);
 
+       // make a single combined shadow mesh to allow optimized shadow volume creation
+       Mod_Q1BSP_CreateShadowMesh(loadmodel);
+
        // compute all the mesh information that was not loaded from the file
-       Mod_MakeSortedSurfaces(loadmodel);
        if (loadmodel->surfmesh.data_element3s)
                for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
                        loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
        Mod_ValidateElements(loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles, 0, loadmodel->surfmesh.num_vertices, __FILE__, __LINE__);
        // generate normals if the file did not have them
        if (!VectorLength2(loadmodel->surfmesh.data_normal3f))
-               Mod_BuildNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_normal3f, true);
-       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, true);
-       Mod_BuildTriangleNeighbors(loadmodel->surfmesh.data_neighbor3i, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles);
-}
-
-
-
-
-
-
-
-
-
-
-#else // OBJASMODEL
-
-#ifdef OBJWORKS
-typedef struct objvertex_s
-{
-       float v[3];
-       float vt[2];
-       float vn[3];
-}
-objvertex_t;
-
-typedef struct objtriangle_s
-{
-       objvertex_t vertex[3];
-       int textureindex;
-       // these fields are used only in conversion to surfaces
-       int axis;
-       int surfaceindex;
-       int surfacevertexindex[3];
-       float edgeplane[3][4];
-}
-objtriangle_t;
+               Mod_BuildNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
+       Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
+       if (loadmodel->surfmesh.data_neighbor3i)
+               Mod_BuildTriangleNeighbors(loadmodel->surfmesh.data_neighbor3i, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles);
+
+       // if this is a worldmodel and has no BSP tree, create a fake one for the purpose
+       loadmodel->brush.num_visleafs = 1;
+       loadmodel->brush.num_leafs = 1;
+       loadmodel->brush.num_nodes = 0;
+       loadmodel->brush.num_leafsurfaces = loadmodel->num_surfaces;
+       loadmodel->brush.data_leafs = (mleaf_t *)Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafs * sizeof(mleaf_t));
+       loadmodel->brush.data_nodes = (mnode_t *)loadmodel->brush.data_leafs;
+       loadmodel->brush.num_pvsclusters = 1;
+       loadmodel->brush.num_pvsclusterbytes = 1;
+       loadmodel->brush.data_pvsclusters = nobsp_pvs;
+       //if (loadmodel->num_nodes) loadmodel->data_nodes = (mnode_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_nodes * sizeof(mnode_t));
+       //loadmodel->data_leafsurfaces = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->num_leafsurfaces * sizeof(int));
+       loadmodel->brush.data_leafsurfaces = loadmodel->sortedmodelsurfaces;
+       VectorCopy(loadmodel->normalmins, loadmodel->brush.data_leafs->mins);
+       VectorCopy(loadmodel->normalmaxs, loadmodel->brush.data_leafs->maxs);
+       loadmodel->brush.data_leafs->combinedsupercontents = 0; // FIXME?
+       loadmodel->brush.data_leafs->clusterindex = 0;
+       loadmodel->brush.data_leafs->areaindex = 0;
+       loadmodel->brush.data_leafs->numleafsurfaces = loadmodel->brush.num_leafsurfaces;
+       loadmodel->brush.data_leafs->firstleafsurface = loadmodel->brush.data_leafsurfaces;
+       loadmodel->brush.data_leafs->numleafbrushes = 0;
+       loadmodel->brush.data_leafs->firstleafbrush = NULL;
+       loadmodel->brush.supportwateralpha = true;
 
-typedef objnode_s
-{
-       struct objnode_s *children[2];
-       struct objnode_s *parent;
-       objtriangle_t *triangles;
-       float normal[3];
-       float dist;
-       float mins[3];
-       float maxs[3];
-       int numtriangles;
-}
-objnode_t;
+       if (loadmodel->brush.numsubmodels)
+               loadmodel->brush.submodels = (dp_model_t **)Mem_Alloc(loadmodel->mempool, loadmodel->brush.numsubmodels * sizeof(dp_model_t *));
 
-objnode_t *Mod_OBJ_BSPNodeForTriangles(objnode_t *parent, objtriangle_t *triangles, int numtriangles, const float *mins, const float *maxs, mem_expandablearray_t *nodesarray, int maxclippedtriangles, objtriangle_t *clippedfronttriangles, objtriangle_t *clippedbacktriangles)
-{
-       int i, j;
-       float normal[3];
-       float dist;
-       int score;
-       float bestnormal[3];
-       float bestdist;
-       int bestscore;
-       float mins[3];
-       float maxs[3];
-       int numfronttriangles;
-       int numbacktriangles;
-       int count_front;
-       int count_back;
-       int count_both;
-       int count_on;
-       float outfrontpoints[5][3];
-       float outbackpoints[5][3];
-       int neededfrontpoints;
-       int neededbackpoints;
-       int countonpoints;
-       objnode_t *node;
-
-       node = (objnode_t *)Mem_ExpandableArray_AllocRecord(array);
-       node->parent = parent;
-       if (numtriangles)
-       {
-               VectorCopy(triangles[0].vertex[0].v, mins);
-               VectorCopy(triangles[0].vertex[0].v, maxs);
-       }
-       else if (parent && parent->children[0] == node)
-       {
-               VectorCopy(parent->mins, mins);
-               Vectorcopy(parent->maxs, maxs);
-       }
-       else if (parent && parent->children[1] == node)
-       {
-               VectorCopy(parent->mins, mins);
-               Vectorcopy(parent->maxs, maxs);
-       }
-       else
-       {
-               VectorClear(mins);
-               VectorClear(maxs);
-       }
-       for (i = 0;i < numtriangles;i++)
-       {
-               for (j = 0;j < 3;j++)
-               {
-                       mins[0] = min(mins[0], triangles[i].vertex[j].v[0]);
-                       mins[1] = min(mins[1], triangles[i].vertex[j].v[1]);
-                       mins[2] = min(mins[2], triangles[i].vertex[j].v[2]);
-                       maxs[0] = max(maxs[0], triangles[i].vertex[j].v[0]);
-                       maxs[1] = max(maxs[1], triangles[i].vertex[j].v[1]);
-                       maxs[2] = max(maxs[2], triangles[i].vertex[j].v[2]);
-               }
-       }
-       VectorCopy(mins, node->mins);
-       VectorCopy(maxs, node->maxs);
-       if (numtriangles <= mod_obj_leaftriangles.integer)
-       {
-               // create a leaf
-               loadmodel->brush.num_leafs++;
-               node->triangles = triangles;
-               node->numtriangles = numtriangles;
-               return node;
-       }
-
-       // create a node
-       loadmodel->brush.num_nodes++;
-       // pick a splitting plane from the various choices available to us...
-       // early splits simply halve the interval
-       bestscore = 0;
-       VectorClear(bestnormal);
-       bestdist = 0;
-       if (numtriangles <= mod_obj_splitterlimit.integer)
-               limit = numtriangles;
-       else
-               limit = 0;
-       for (i = -3;i < limit;i++)
+       mod = loadmodel;
+       for (i = 0;i < loadmodel->brush.numsubmodels;i++)
        {
-               if (i < 0)
-               {
-                       // first we try 3 axial splits (kdtree-like)
-                       j = i + 3;
-                       VectorClear(normal);
-                       normal[j] = 1;
-                       dist = (mins[j] + maxs[j]) * 0.5f;
-               }
-               else
-               {
-                       // then we try each triangle plane
-                       TriangleNormal(triangles[i].vertex[0].v, triangles[i].vertex[1].v, triangles[i].vertex[2].v, normal);
-                       VectorNormalize(normal);
-                       dist = DotProduct(normal, triangles[i].vertex[0].v);
-                       // use positive axial values whenever possible
-                       if (normal[0] == -1)
-                               normal[0] = 1;
-                       if (normal[1] == -1)
-                               normal[1] = 1;
-                       if (normal[2] == -1)
-                               normal[2] = 1;
-                       // skip planes that match the current best
-                       if (VectorCompare(normal, bestnormal) && dist == bestdist)
-                               continue;
-               }
-               count_on = 0;
-               count_front = 0;
-               count_back = 0;
-               count_both = 0;
-               for (j = 0;j < numtriangles;j++)
-               {
-                       dists[0] = DotProduct(normal, triangles[j].vertex[0].v) - dist;
-                       dists[1] = DotProduct(normal, triangles[j].vertex[1].v) - dist;
-                       dists[2] = DotProduct(normal, triangles[j].vertex[2].v) - dist;
-                       if (dists[0] < -DIST_EPSILON || dists[1] < -DIST_EPSILON || dists[2] < -DIST_EPSILON)
-                       {
-                               if (dists[0] > DIST_EPSILON || dists[1] > DIST_EPSILON || dists[2] > DIST_EPSILON)
-                                       count_both++;
-                               else
-                                       count_back++;
-                       }
-                       else if (dists[0] > DIST_EPSILON || dists[1] > DIST_EPSILON || dists[2] > DIST_EPSILON)
-                               count_front++;
-                       else
-                               count_on++;
-               }
-               // score is supposed to:
-               // prefer axial splits
-               // prefer evenly dividing the input triangles
-               // prefer triangles on the plane
-               // avoid triangles crossing the plane
-               score = count_on*count_on - count_both*count_both + min(count_front, count_back)*(count_front+count_back);
-               if (normal[0] == 1 || normal[1] == 1 || normal[2] == 1)
-                       score *= 2;
-               if (i == -3 || bestscore < score)
+               if (i > 0)
                {
-                       VectorCopy(normal, bestnormal);
-                       bestdist = dist;
-                       bestscore = score;
+                       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;
 
-       // now we have chosen an optimal split plane...
+               // make the model surface list (used by shadowing/lighting)
+               mod->firstmodelsurface = submodelfirstsurface[i];
+               mod->nummodelsurfaces = submodelfirstsurface[i+1] - submodelfirstsurface[i];
+               mod->firstmodelbrush = 0;
+               mod->nummodelbrushes = 0;
+               mod->sortedmodelsurfaces = loadmodel->sortedmodelsurfaces + mod->firstmodelsurface;
+               Mod_MakeSortedSurfaces(mod);
 
-       // divide triangles by the splitting plane
-       numfronttriangles = 0;
-       numbacktriangles = 0;
-       for (i = 0;i < numtriangles;i++)
-       {
-               neededfrontpoints = 0;
-               neededbackpoints = 0;
-               countonpoints = 0;
-               PolygonF_Divide(3, triangles[i].vertex[0].v, bestnormal[0], bestnormal[1], bestnormal[2], bestdist, DIST_EPSILON, 5, outfrontpoints[0], &neededfrontpoints, 5, outbackpoints[0], &neededbackpoints, &countonpoints);
-               if (countonpoints > 1)
-               {
-                       // triangle lies on plane, assign it to one child only
-                       TriangleNormal(triangles[i].vertex[0].v, triangles[i].vertex[1].v, triangles[i].vertex[2].v, normal);
-                       if (DotProduct(bestnormal, normal) >= 0)
-                       {
-                               // assign to front side child
-                               obj_fronttriangles[numfronttriangles++] = triangles[i];
-                       }
-                       else
-                       {
-                               // assign to back side child
-                               obj_backtriangles[numbacktriangles++] = triangles[i];
-                       }
-               }
-               else
+               VectorClear(mod->normalmins);
+               VectorClear(mod->normalmaxs);
+               l = false;
+               for (j = 0;j < mod->nummodelsurfaces;j++)
                {
-                       // convert clipped polygons to triangles
-                       for (j = 0;j < neededfrontpoints-2;j++)
-                       {
-                               obj_fronttriangles[numfronttriangles] = triangles[i];
-                               VectorCopy(outfrontpoints[0], obj_fronttriangles[numfronttriangles].vertex[0].v);
-                               VectorCopy(outfrontpoints[j+1], obj_fronttriangles[numfronttriangles].vertex[1].v);
-                               VectorCopy(outfrontpoints[j+2], obj_fronttriangles[numfronttriangles].vertex[2].v);
-                               numfronttriangles++;
-                       }
-                       for (j = 0;j < neededbackpoints-2;j++)
-                       {
-                               obj_backtriangles[numbacktriangles] = triangles[i];
-                               VectorCopy(outbackpoints[0], obj_backtriangles[numbacktriangles].vertex[0].v);
-                               VectorCopy(outbackpoints[j+1], obj_backtriangles[numbacktriangles].vertex[1].v);
-                               VectorCopy(outbackpoints[j+2], obj_backtriangles[numbacktriangles].vertex[2].v);
-                               numbacktriangles++;
-                       }
-               }
-       }
-
-       // now copy the triangles out of the big buffer
-       if (numfronttriangles)
-       {
-               fronttriangles = Mem_Alloc(loadmodel->mempool, fronttriangles * sizeof(*fronttriangles));
-               memcpy(fronttriangles, obj_fronttriangles, numfronttriangles * sizeof(*fronttriangles));
-       }
-       else
-               fronttriangles = NULL;
-       if (numbacktriangles)
-       {
-               backtriangles = Mem_Alloc(loadmodel->mempool, backtriangles * sizeof(*backtriangles));
-               memcpy(backtriangles, obj_backtriangles, numbacktriangles * sizeof(*backtriangles));
-       }
-       else
-               backtriangles = NULL;
-
-       // free the original triangles we were given
-       if (triangles)
-               Mem_Free(triangles);
-       triangles = NULL;
-       numtriangles = 0;
-
-       // now create the children...
-       node->children[0] = Mod_OBJ_BSPNodeForTriangles(node, fronttriangles, numfronttriangles, frontmins, frontmaxs, nodesarray, maxclippedtriangles, clippedfronttriangles, clippedbacktriangles);
-       node->children[1] = Mod_OBJ_BSPNodeForTriangles(node, backtriangles, numbacktriangles, backmins, backmaxs, nodesarray, maxclippedtriangles, clippedfronttriangles, clippedbacktriangles);
-       return node;
-}
-
-void Mod_OBJ_SnapVertex(float *v)
-{
-       int i;
-       float a = mod_obj_vertexprecision.value;
-       float b = 1.0f / a;
-       v[0] -= floor(v[0] * a + 0.5f) * b;
-       v[1] -= floor(v[1] * a + 0.5f) * b;
-       v[2] -= floor(v[2] * a + 0.5f) * b;
-}
-
-void Mod_OBJ_ConvertBSPNode(objnode_t *objnode, mnode_t *mnodeparent)
-{
-       if (objnode->children[0])
-       {
-               // convert to mnode_t
-               mnode_t *mnode = loadmodel->brush.data_nodes + loadmodel->brush.num_nodes++;
-               mnode->parent = mnodeparent;
-               mnode->plane = loadmodel->brush.data_planes + loadmodel->brush.num_planes++;
-               VectorCopy(objnode->normal, mnode->plane->normal);
-               mnode->plane->dist = objnode->dist;
-               PlaneClassify(mnode->plane);
-               VectorCopy(objnode->mins, mnode->mins);
-               VectorCopy(objnode->maxs, mnode->maxs);
-               // push combinedsupercontents up to the parent
-               if (mnodeparent)
-                       mnodeparent->combinedsupercontents |= mnode->combinedsupercontents;
-               mnode->children[0] = Mod_OBJ_ConvertBSPNode(objnode->children[0], mnode);
-               mnode->children[1] = Mod_OBJ_ConvertBSPNode(objnode->children[1], mnode);
-       }
-       else
-       {
-               // convert to mleaf_t
-               mleaf_t *mleaf = loadmodel->brush.data_leafs + loadmodel->brush.num_leafs++;
-               mleaf->parent = mnodeparent;
-               VectorCopy(objnode->mins, mleaf->mins);
-               VectorCopy(objnode->maxs, mleaf->maxs);
-               mleaf->clusterindex = loadmodel->brush.num_leafs - 1;
-               if (objnode->numtriangles)
-               {
-                       objtriangle_t *triangles = objnode->triangles;
-                       int numtriangles = objnode->numtriangles;
-                       texture_t *texture;
-                       float edge[3][3];
-                       float normal[3];
-                       objvertex_t vertex[3];
-                       numsurfaces = 0;
-                       maxsurfaces = numtriangles;
-                       surfaces = NULL;
-                       // calculate some more data on each triangle for surface gathering
-                       for (i = 0;i < numtriangles;i++)
+                       const msurface_t *surface = mod->data_surfaces + j + mod->firstmodelsurface;
+                       const float *v = mod->surfmesh.data_vertex3f + 3 * surface->num_firstvertex;
+                       int k;
+                       if (!surface->num_vertices)
+                               continue;
+                       if (!l)
                        {
-                               triangle = triangles + i;
-                               texture = loadmodel->data_textures + triangle->textureindex;
-                               Mod_OBJ_SnapVertex(triangle->vertex[0].v);
-                               Mod_OBJ_SnapVertex(triangle->vertex[1].v);
-                               Mod_OBJ_SnapVertex(triangle->vertex[2].v);
-                               TriangleNormal(triangle->vertex[0].v, triangle->vertex[1].v, triangle->vertex[2].v, normal);
-                               axis = 0;
-                               if (fabs(normal[axis]) < fabs(normal[1]))
-                                       axis = 1;
-                               if (fabs(normal[axis]) < fabs(normal[2]))
-                                       axis = 2;
-                               VectorClear(normal);
-                               normal[axis] = 1;
-                               triangle->axis = axis;
-                               VectorSubtract(triangle->vertex[1].v, triangle->vertex[0].v, edge[0]);
-                               VectorSubtract(triangle->vertex[2].v, triangle->vertex[1].v, edge[1]);
-                               VectorSubtract(triangle->vertex[0].v, triangle->vertex[2].v, edge[2]);
-                               CrossProduct(edge[0], normal, triangle->edgeplane[0]);
-                               CrossProduct(edge[1], normal, triangle->edgeplane[1]);
-                               CrossProduct(edge[2], normal, triangle->edgeplane[2]);
-                               VectorNormalize(triangle->edgeplane[0]);
-                               VectorNormalize(triangle->edgeplane[1]);
-                               VectorNormalize(triangle->edgeplane[2]);
-                               triangle->edgeplane[0][3] = DotProduct(triangle->edgeplane[0], triangle->vertex[0].v);
-                               triangle->edgeplane[1][3] = DotProduct(triangle->edgeplane[1], triangle->vertex[1].v);
-                               triangle->edgeplane[2][3] = DotProduct(triangle->edgeplane[2], triangle->vertex[2].v);
-                               triangle->surfaceindex = 0;
-                               // add to the combined supercontents while we're here...
-                               mleaf->combinedsupercontents |= texture->supercontents;
+                               l = true;
+                               VectorCopy(v, mod->normalmins);
+                               VectorCopy(v, mod->normalmaxs);
                        }
-                       surfaceindex = 1;
-                       for (i = 0;i < numtriangles;i++)
+                       for (k = 0;k < surface->num_vertices;k++, v += 3)
                        {
-                               // skip already-assigned triangles
-                               if (triangles[i].surfaceindex)
-                                       continue;
-                               texture = loadmodel->data_textures + triangles[i].textureindex;
-                               // assign a new surface to this triangle
-                               triangles[i].surfaceindex = surfaceindex++;
-                               axis = triangles[i].axis;
-                               numvertices = 3;
-                               // find the triangle's neighbors, this can take multiple passes
-                               retry = true;
-                               while (retry)
-                               {
-                                       retry = false;
-                                       for (j = i+1;j < numtriangles;j++)
-                                       {
-                                               if (triangles[j].surfaceindex || triangles[j].axis != axis || triangles[j].texture != texture)
-                                                       continue;
-                                               triangle = triangles + j;
-                                               for (k = i;k < j;k++)
-                                               {
-                                                       if (triangles[k].surfaceindex != surfaceindex)
-                                                               continue;
-                                                       if (VectorCompare(triangles[k].vertex[0].v, triangles[j].vertex[0].v)
-                                                        || VectorCompare(triangles[k].vertex[0].v, triangles[j].vertex[1].v)
-                                                        || VectorCompare(triangles[k].vertex[0].v, triangles[j].vertex[2].v)
-                                                        || VectorCompare(triangles[k].vertex[1].v, triangles[j].vertex[0].v)
-                                                        || VectorCompare(triangles[k].vertex[1].v, triangles[j].vertex[1].v)
-                                                        || VectorCompare(triangles[k].vertex[1].v, triangles[j].vertex[2].v)
-                                                        || VectorCompare(triangles[k].vertex[2].v, triangles[j].vertex[0].v)
-                                                        || VectorCompare(triangles[k].vertex[2].v, triangles[j].vertex[1].v)
-                                                        || VectorCompare(triangles[k].vertex[2].v, triangles[j].vertex[2].v))
-                                                       {
-                                                               // shares a vertex position
-                                                               --- FIXME ---
-                                                       }
-                                               }
-                                               for (k = 0;k < numvertices;k++)
-                                                       if (!VectorCompare(vertex[k].v, triangles[j].vertex[0].v) || !VectorCompare(vertex[k].v, triangles[j].vertex[1].v) || !VectorCompare(vertex[k].v, triangles[j].vertex[2].v))
-                                                               break;
-                                               if (k == numvertices)
-                                                       break; // not a neighbor
-                                               // this triangle is a neighbor and has the same axis and texture
-                                               // check now if it overlaps in lightmap projection space
-                                               triangles[j].surfaceindex;
-                                               if (triangles[j].
-                                       }
-                               }
-                               //triangles[i].surfaceindex = surfaceindex++;
-                               for (surfaceindex = 0;surfaceindex < numsurfaces;surfaceindex++)
-                               {
-                                       if (surfaces[surfaceindex].texture != texture)
-                                               continue;
-                                       // check if any triangles already in this surface overlap in lightmap projection space
-                                       
-                                       {
-                                       }
-                                       break;
-                               }
+                               mod->normalmins[0] = min(mod->normalmins[0], v[0]);
+                               mod->normalmins[1] = min(mod->normalmins[1], v[1]);
+                               mod->normalmins[2] = min(mod->normalmins[2], v[2]);
+                               mod->normalmaxs[0] = max(mod->normalmaxs[0], v[0]);
+                               mod->normalmaxs[1] = max(mod->normalmaxs[1], v[1]);
+                               mod->normalmaxs[2] = max(mod->normalmaxs[2], v[2]);
                        }
-                       // let the collision code simply use the surfaces
-                       mleaf->containscollisionsurfaces = mleaf->combinedsupercontents != 0;
-                       mleaf->numleafsurfaces = ?;
-                       mleaf->firstleafsurface = ?;
                }
-               // push combinedsupercontents up to the parent
-               if (mnodeparent)
-                       mnodeparent->combinedsupercontents |= mleaf->combinedsupercontents;
-       }
-}
-#endif
-
-void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
-{
-#ifdef OBJWORKS
-       const char *textbase = (char *)buffer, *text = textbase;
-       char *s;
-       char *argv[512];
-       char line[1024];
-       char materialname[MAX_QPATH];
-       int j, index1, index2, index3, first, prev, index;
-       int argc;
-       int linelen;
-       int numtriangles = 0;
-       int maxtriangles = 131072;
-       objtriangle_t *triangles = Mem_Alloc(tempmempool, maxtriangles * sizeof(*triangles));
-       int linenumber = 0;
-       int maxtextures = 256, numtextures = 0, textureindex = 0;
-       int maxv = 1024, numv = 0;
-       int maxvt = 1024, numvt = 0;
-       int maxvn = 1024, numvn = 0;
-       char **texturenames;
-       float *v = Mem_Alloc(tempmempool, maxv * sizeof(float[3]));
-       float *vt = Mem_Alloc(tempmempool, maxvt * sizeof(float[2]));
-       float *vn = Mem_Alloc(tempmempool, maxvn * sizeof(float[3]));
-       objvertex_t vfirst, vprev, vcurrent;
-       float mins[3];
-       float maxs[3];
-#if 0
-       int hashindex;
-       int maxverthash = 65536, numverthash = 0;
-       int numhashindex = 65536;
-       struct objverthash_s
-       {
-               struct objverthash_s *next;
-               int s;
-               int v;
-               int vt;
-               int vn;
-       }
-       *hash, **verthash = Mem_Alloc(tempmempool, numhashindex * sizeof(*verthash)), *verthashdata = Mem_Alloc(tempmempool, maxverthash * sizeof(*verthashdata)), *oldverthashdata;
-#endif
-
-       dpsnprintf(materialname, sizeof(materialname), "%s", loadmodel->name);
-
-       loadmodel->modeldatatypestring = "OBJ";
-
-       loadmodel->type = mod_obj;
-       loadmodel->soundfromcenter = true;
-       loadmodel->TraceBox = Mod_OBJ_TraceBox;
-       loadmodel->TraceLine = Mod_OBJ_TraceLine;
-       loadmodel->TracePoint = Mod_OBJ_TracePoint;
-       loadmodel->PointSuperContents = Mod_OBJ_PointSuperContents;
-       loadmodel->brush.TraceLineOfSight = Mod_OBJ_TraceLineOfSight;
-       loadmodel->brush.SuperContentsFromNativeContents = Mod_OBJ_SuperContentsFromNativeContents;
-       loadmodel->brush.NativeContentsFromSuperContents = Mod_OBJ_NativeContentsFromSuperContents;
-       loadmodel->brush.GetPVS = Mod_OBJ_GetPVS;
-       loadmodel->brush.FatPVS = Mod_OBJ_FatPVS;
-       loadmodel->brush.BoxTouchingPVS = Mod_OBJ_BoxTouchingPVS;
-       loadmodel->brush.BoxTouchingLeafPVS = Mod_OBJ_BoxTouchingLeafPVS;
-       loadmodel->brush.BoxTouchingVisibleLeafs = Mod_OBJ_BoxTouchingVisibleLeafs;
-       loadmodel->brush.FindBoxClusters = Mod_OBJ_FindBoxClusters;
-       loadmodel->brush.LightPoint = Mod_OBJ_LightPoint;
-       loadmodel->brush.FindNonSolidLocation = Mod_OBJ_FindNonSolidLocation;
-       loadmodel->brush.AmbientSoundLevelsForPoint = NULL;
-       loadmodel->brush.RoundUpToHullSize = NULL;
-       loadmodel->brush.PointInLeaf = Mod_OBJ_PointInLeaf;
-       loadmodel->Draw = R_Q1BSP_Draw;
-       loadmodel->DrawDepth = R_Q1BSP_DrawDepth;
-       loadmodel->DrawDebug = R_Q1BSP_DrawDebug;
-       loadmodel->DrawPrepass = R_Q1BSP_DrawPrepass;
-       loadmodel->GetLightInfo = R_Q1BSP_GetLightInfo;
-       loadmodel->CompileShadowMap = R_Q1BSP_CompileShadowMap;
-       loadmodel->DrawShadowMap = R_Q1BSP_DrawShadowMap;
-       loadmodel->CompileShadowVolume = R_Q1BSP_CompileShadowVolume;
-       loadmodel->DrawShadowVolume = R_Q1BSP_DrawShadowVolume;
-       loadmodel->DrawLight = R_Q1BSP_DrawLight;
+               corner[0] = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
+               corner[1] = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
+               corner[2] = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
+               modelradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]+corner[2]*corner[2]);
+               yawradius = sqrt(corner[0]*corner[0]+corner[1]*corner[1]);
+               mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
+               mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] = modelradius;
+               mod->yawmaxs[0] = mod->yawmaxs[1] = yawradius;
+               mod->yawmins[0] = mod->yawmins[1] = -yawradius;
+               mod->yawmins[2] = mod->normalmins[2];
+               mod->yawmaxs[2] = mod->normalmaxs[2];
+               mod->radius = modelradius;
+               mod->radius2 = modelradius * modelradius;
 
-       VectorClear(mins);
-       VectorClear(maxs);
+               // this gets altered below if sky or water is used
+               mod->DrawSky = NULL;
+               mod->DrawAddWaterPlanes = NULL;
 
-       // parse the OBJ text now
-       for(;;)
-       {
-               if (!*text)
-                       break;
-               linenumber++;
-               linelen = 0;
-               for (linelen = 0;text[linelen] && text[linelen] != '\r' && text[linelen] != '\n';linelen++)
-                       line[linelen] = text[linelen];
-               line[linelen] = 0;
-               for (argc = 0;argc < (int)(sizeof(argv)/sizeof(argv[0]));argc++)
-                       argv[argc] = "";
-               argc = 0;
-               s = line;
-               while (*s == ' ' || *s == '\t')
-                       s++;
-               while (*s)
-               {
-                       argv[argc++] = s;
-                       while (*s > ' ')
-                               s++;
-                       if (!*s)
+               for (j = 0;j < mod->nummodelsurfaces;j++)
+                       if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & MATERIALFLAG_SKY)
                                break;
-                       *s++ = 0;
-                       while (*s == ' ' || *s == '\t')
-                               s++;
-               }
-               if (!argc)
-                       continue;
-               if (argv[0][0] == '#')
-                       continue;
-               if (!strcmp(argv[0], "v"))
-               {
-                       if (maxv <= numv)
-                       {
-                               float *oldv = v;
-                               maxv *= 2;
-                               v = Mem_Alloc(tempmempool, maxv * sizeof(float[3]));
-                               if (oldv)
-                               {
-                                       memcpy(v, oldv, numv * sizeof(float[3]));
-                                       Mem_Free(oldv);
-                               }
-                       }
-                       v[numv*3+0] = atof(argv[1]);
-                       v[numv*3+1] = atof(argv[2]);
-                       v[numv*3+2] = atof(argv[3]);
-                       numv++;
-               }
-               else if (!strcmp(argv[0], "vt"))
-               {
-                       if (maxvt <= numvt)
-                       {
-                               float *oldvt = vt;
-                               maxvt *= 2;
-                               vt = Mem_Alloc(tempmempool, maxvt * sizeof(float[2]));
-                               if (oldvt)
-                               {
-                                       memcpy(vt, oldvt, numvt * sizeof(float[2]));
-                                       Mem_Free(oldvt);
-                               }
-                       }
-                       vt[numvt*2+0] = atof(argv[1]);
-                       vt[numvt*2+1] = atof(argv[2]);
-                       numvt++;
-               }
-               else if (!strcmp(argv[0], "vn"))
-               {
-                       if (maxvn <= numvn)
-                       {
-                               float *oldvn = vn;
-                               maxvn *= 2;
-                               vn = Mem_Alloc(tempmempool, maxvn * sizeof(float[3]));
-                               if (oldvn)
-                               {
-                                       memcpy(vn, oldvn, numvn * sizeof(float[3]));
-                                       Mem_Free(oldvn);
-                               }
-                       }
-                       vn[numvn*3+0] = atof(argv[1]);
-                       vn[numvn*3+1] = atof(argv[2]);
-                       vn[numvn*3+2] = atof(argv[3]);
-                       numvn++;
-               }
-               else if (!strcmp(argv[0], "f"))
-               {
-                       for (j = 1;j < argc;j++)
-                       {
-                               index1 = atoi(argv[j]);
-                               while(argv[j][0] && argv[j][0] != '/')
-                                       argv[j]++;
-                               if (argv[j][0])
-                                       argv[j]++;
-                               index2 = atoi(argv[j]);
-                               while(argv[j][0] && argv[j][0] != '/')
-                                       argv[j]++;
-                               if (argv[j][0])
-                                       argv[j]++;
-                               index3 = atoi(argv[j]);
-                               // negative refers to a recent vertex
-                               // zero means not specified
-                               // positive means an absolute vertex index
-                               if (index1 < 0)
-                                       index1 = numv - index1;
-                               if (index2 < 0)
-                                       index2 = numvt - index2;
-                               if (index3 < 0)
-                                       index3 = numvn - index3;
-                               VectorCopy(v + 3*index1, vcurrent.v);
-                               Vector2Copy(vt + 2*index2, vcurrent.vt);
-                               VectorCopy(vn + 3*index3, vcurrent.vn);
-                               if (numtriangles == 0)
-                               {
-                                       VectorCopy(vcurrent.v, mins);
-                                       VectorCopy(vcurrent.v, maxs);
-                               }
-                               else
-                               {
-                                       mins[0] = min(mins[0], vcurrent.v[0]);
-                                       mins[1] = min(mins[1], vcurrent.v[1]);
-                                       mins[2] = min(mins[2], vcurrent.v[2]);
-                                       maxs[0] = max(maxs[0], vcurrent.v[0]);
-                                       maxs[1] = max(maxs[1], vcurrent.v[1]);
-                                       maxs[2] = max(maxs[2], vcurrent.v[2]);
-                               }
-                               if (j == 1)
-                                       vfirst = vcurrent;
-                               else if (j >= 3)
-                               {
-                                       if (maxtriangles <= numtriangles)
-                                       {
-                                               objtriangle_t *oldtriangles = triangles;
-                                               maxtriangles *= 2;
-                                               triangles = Mem_Alloc(tempmempool, maxtriangles * sizeof(*triangles));
-                                               if (oldtriangles)
-                                               {
-                                                       memcpy(triangles, oldtriangles, maxtriangles * sizeof(*triangles));
-                                                       Mem_Free(oldtriangles);
-                                               }
-                                       }
-                                       triangles[numtriangles].textureindex = textureindex;
-                                       triangles[numtriangles].vertex[0] = vfirst;
-                                       triangles[numtriangles].vertex[1] = vprev;
-                                       triangles[numtriangles].vertex[2] = vcurrent;
-                                       numtriangles++;
-                               }
-                               vprev = vcurrent;
-                               prev = index;
-                       }
-               }
-               else if (!strcmp(argv[0], "o") || !strcmp(argv[0], "g"))
-                       ;
-               else if (!!strcmp(argv[0], "usemtl"))
-               {
-                       for (i = 0;i < numtextures;i++)
-                               if (!strcmp(texturenames[numtextures], argv[1]))
-                                       break;
-                       if (i < numtextures)
-                               texture = textures + i;
-                       else
-                       {
-                               if (maxtextures <= numtextures)
-                               {
-                                       texture_t *oldtextures = textures;
-                                       maxtextures *= 2;
-                                       textures = Mem_Alloc(tempmempool, maxtextures * sizeof(*textures));
-                                       if (oldtextures)
-                                       {
-                                               memcpy(textures, oldtextures, numtextures * sizeof(*textures));
-                                               Mem_Free(oldtextures);
-                                       }
-                               }
-                               textureindex = numtextures++;
-                               texturenames[textureindex] = Mem_Alloc(tempmempool, strlen(argv[1]) + 1);
-                               memcpy(texturenames[textureindex], argv[1], strlen(argv[1]) + 1);
-                       }
-               }
-               text += linelen;
-               if (*text == '\r')
-                       text++;
-               if (*text == '\n')
-                       text++;
-       }
-
-       // now that we have the OBJ data loaded as-is, we can convert it
-
-       // load the textures
-       loadmodel->num_textures = numtextures;
-       loadmodel->data_textures = Mem_Alloc(loadmodel->mempool, loadmodel->num_textures * sizeof(texture_t));
-       for (i = 0;i < numtextures;i++)
-               Mod_LoadTextureFromQ3Shader(loadmodel->data_textures + i, texturenames[i], true, true, TEXF_MIPMAP | TEXF_ALPHA | (r_picmipworld.integer ? TEXF_PICMIP : 0) | TEXF_COMPRESS);
-
-       // free the texturenames array since we are now done with it
-       for (i = 0;i < numtextures;i++)
-       {
-               Mem_Free(texturenames[i]);
-               texturenames[i] = NULL;
-       }
-       Mem_Free(texturenames);
-       texturenames = NULL;
-
-       // copy the model bounds, then enlarge the yaw and rotated bounds according to radius
-       VectorCopy(mins, loadmodel->normalmins);
-       VectorCopy(maxs, loadmodel->normalmaxs);
-       dist = max(fabs(loadmodel->normalmins[0]), fabs(loadmodel->normalmaxs[0]));
-       modelyawradius = max(fabs(loadmodel->normalmins[1]), fabs(loadmodel->normalmaxs[1]));
-       modelyawradius = dist*dist+modelyawradius*modelyawradius;
-       modelradius = max(fabs(loadmodel->normalmins[2]), fabs(loadmodel->normalmaxs[2]));
-       modelradius = modelyawradius + modelradius * modelradius;
-       modelyawradius = sqrt(modelyawradius);
-       modelradius = sqrt(modelradius);
-       loadmodel->yawmins[0] = loadmodel->yawmins[1] = -modelyawradius;
-       loadmodel->yawmins[2] = loadmodel->normalmins[2];
-       loadmodel->yawmaxs[0] = loadmodel->yawmaxs[1] =  modelyawradius;
-       loadmodel->yawmaxs[2] = loadmodel->normalmaxs[2];
-       loadmodel->rotatedmins[0] = loadmodel->rotatedmins[1] = loadmodel->rotatedmins[2] = -modelradius;
-       loadmodel->rotatedmaxs[0] = loadmodel->rotatedmaxs[1] = loadmodel->rotatedmaxs[2] =  modelradius;
-       loadmodel->radius = modelradius;
-       loadmodel->radius2 = modelradius * modelradius;
-
-       // make sure the temp triangle buffer is big enough for BSP building
-       maxclippedtriangles = numtriangles*4;
-       if (numtriangles > 0)
-       {
-               clippedfronttriangles = Mem_Alloc(loadmodel->mempool, maxclippedtriangles * 2 * sizeof(objtriangle_t));
-               clippedbacktriangles = clippedfronttriangles + maxclippedtriangles;
-       }
-
-       // generate a rough BSP tree from triangle data, we don't have to be too careful here, it only has to define the basic areas of the map
-       loadmodel->brush.num_leafs = 0;
-       loadmodel->brush.num_nodes = 0;
-       Mem_ExpandableArray_NewArray(&nodesarray, loadmodel->mempool, sizeof(objnode_t), 1024);
-       rootnode = Mod_OBJ_BSPNodeForTriangles(triangles, numtriangles, mins, maxs, &nodesarray, maxclippedtriangles, clippedfronttriangles, clippedbacktriangles);
-
-       // convert the BSP tree to mnode_t and mleaf_t structures and convert the triangles to msurface_t...
-       loadmodel->brush.data_leafs = Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_leafs * sizeof(mleaf_t));
-       loadmodel->brush.data_nodes = Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_nodes * sizeof(mnode_t));
-       loadmodel->brush.data_planes = Mem_Alloc(loadmodel->mempool, loadmodel->brush.num_nodes * sizeof(mplane_t));
-       loadmodel->brush.num_leafs = 0;
-       loadmodel->brush.num_nodes = 0;
-       loadmodel->brush.num_planes = 0;
-       Mod_OBJ_ConvertAndFreeBSPNode(rootnode);
-
-       if (clippedfronttriangles)
-               Mem_Free(clippedfronttriangles);
-       maxclippedtriangles = 0;
-       clippedfronttriangles = NULL;
-       clippedbacktriangles = NULL;
-
---- NOTHING DONE PAST THIS POINT ---
-
-       loadmodel->numskins = LittleLong(pinmodel->num_skins);
-       numxyz = LittleLong(pinmodel->num_xyz);
-       numst = LittleLong(pinmodel->num_st);
-       loadmodel->surfmesh.num_triangles = LittleLong(pinmodel->num_tris);
-       loadmodel->numframes = LittleLong(pinmodel->num_frames);
-       loadmodel->surfmesh.num_morphframes = loadmodel->numframes;
-       loadmodel->num_poses = loadmodel->surfmesh.num_morphframes;
-       skinwidth = LittleLong(pinmodel->skinwidth);
-       skinheight = LittleLong(pinmodel->skinheight);
-       iskinwidth = 1.0f / skinwidth;
-       iskinheight = 1.0f / skinheight;
-
-       loadmodel->num_surfaces = 1;
-       loadmodel->nummodelsurfaces = loadmodel->num_surfaces;
-       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(msurface_t) + loadmodel->num_surfaces * sizeof(int) + loadmodel->numframes * sizeof(animscene_t) + loadmodel->numframes * sizeof(float[6]) + loadmodel->surfmesh.num_triangles * sizeof(int[3]) + loadmodel->surfmesh.num_triangles * sizeof(int[3]));
-       loadmodel->data_surfaces = (msurface_t *)data;data += loadmodel->num_surfaces * sizeof(msurface_t);
-       loadmodel->sortedmodelsurfaces = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
-       loadmodel->sortedmodelsurfaces[0] = 0;
-       loadmodel->animscenes = (animscene_t *)data;data += loadmodel->numframes * sizeof(animscene_t);
-       loadmodel->surfmesh.data_morphmd2framesize6f = (float *)data;data += loadmodel->numframes * sizeof(float[6]);
-       loadmodel->surfmesh.data_element3i = (int *)data;data += loadmodel->surfmesh.num_triangles * sizeof(int[3]);
-       loadmodel->surfmesh.data_neighbor3i = (int *)data;data += loadmodel->surfmesh.num_triangles * sizeof(int[3]);
-
-       loadmodel->synctype = ST_RAND;
-
-       // load the skins
-       inskin = (char *)(base + LittleLong(pinmodel->ofs_skins));
-       skinfiles = Mod_LoadSkinFiles();
-       if (skinfiles)
-       {
-               loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
-               loadmodel->num_texturesperskin = loadmodel->num_surfaces;
-               loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
-               Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures, skinfiles, "default", "");
-               Mod_FreeSkinFiles(skinfiles);
-       }
-       else if (loadmodel->numskins)
-       {
-               // skins found (most likely not a player model)
-               loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
-               loadmodel->num_texturesperskin = loadmodel->num_surfaces;
-               loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
-               for (i = 0;i < loadmodel->numskins;i++, inskin += MD2_SKINNAME)
-                       Mod_LoadTextureFromQ3Shader(loadmodel->data_textures + i * loadmodel->num_surfaces, inskin, true, true, (r_mipskins.integer ? TEXF_MIPMAP : 0) | TEXF_ALPHA | TEXF_PICMIP | TEXF_COMPRESS);
-       }
-       else
-       {
-               // no skins (most likely a player model)
-               loadmodel->numskins = 1;
-               loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
-               loadmodel->num_texturesperskin = loadmodel->num_surfaces;
-               loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
-               Mod_BuildAliasSkinFromSkinFrame(loadmodel->data_textures, NULL);
-       }
-
-       loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, sizeof(animscene_t) * loadmodel->numskins);
-       for (i = 0;i < loadmodel->numskins;i++)
-       {
-               loadmodel->skinscenes[i].firstframe = i;
-               loadmodel->skinscenes[i].framecount = 1;
-               loadmodel->skinscenes[i].loop = true;
-               loadmodel->skinscenes[i].framerate = 10;
-       }
-
-       // load the triangles and stvert data
-       inst = (unsigned short *)(base + LittleLong(pinmodel->ofs_st));
-       intri = (md2triangle_t *)(base + LittleLong(pinmodel->ofs_tris));
-       md2verthash = (struct md2verthash_s **)Mem_Alloc(tempmempool, 65536 * sizeof(hash));
-       md2verthashdata = (struct md2verthash_s *)Mem_Alloc(tempmempool, loadmodel->surfmesh.num_triangles * 3 * sizeof(*hash));
-       // swap the triangle list
-       loadmodel->surfmesh.num_vertices = 0;
-       for (i = 0;i < loadmodel->surfmesh.num_triangles;i++)
-       {
-               for (j = 0;j < 3;j++)
-               {
-                       xyz = (unsigned short) LittleShort (intri[i].index_xyz[j]);
-                       st = (unsigned short) LittleShort (intri[i].index_st[j]);
-                       if (xyz >= numxyz)
-                       {
-                               Con_Printf("%s has an invalid xyz index (%i) on triangle %i, resetting to 0\n", loadmodel->name, xyz, i);
-                               xyz = 0;
-                       }
-                       if (st >= numst)
-                       {
-                               Con_Printf("%s has an invalid st index (%i) on triangle %i, resetting to 0\n", loadmodel->name, st, i);
-                               st = 0;
-                       }
-                       hashindex = (xyz * 256 + st) & 65535;
-                       for (hash = md2verthash[hashindex];hash;hash = hash->next)
-                               if (hash->xyz == xyz && hash->st == st)
-                                       break;
-                       if (hash == NULL)
-                       {
-                               hash = md2verthashdata + loadmodel->surfmesh.num_vertices++;
-                               hash->xyz = xyz;
-                               hash->st = st;
-                               hash->next = md2verthash[hashindex];
-                               md2verthash[hashindex] = hash;
-                       }
-                       loadmodel->surfmesh.data_element3i[i*3+j] = (hash - md2verthashdata);
-               }
-       }
-
-       vertremap = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->surfmesh.num_vertices * sizeof(int));
-       data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->surfmesh.num_vertices * sizeof(float[2]) + loadmodel->surfmesh.num_vertices * loadmodel->surfmesh.num_morphframes * sizeof(trivertx_t));
-       loadmodel->surfmesh.data_texcoordtexture2f = (float *)data;data += loadmodel->surfmesh.num_vertices * sizeof(float[2]);
-       loadmodel->surfmesh.data_morphmdlvertex = (trivertx_t *)data;data += loadmodel->surfmesh.num_vertices * loadmodel->surfmesh.num_morphframes * sizeof(trivertx_t);
-       for (i = 0;i < loadmodel->surfmesh.num_vertices;i++)
-       {
-               int sts, stt;
-               hash = md2verthashdata + i;
-               vertremap[i] = hash->xyz;
-               sts = LittleShort(inst[hash->st*2+0]);
-               stt = LittleShort(inst[hash->st*2+1]);
-               if (sts < 0 || sts >= skinwidth || stt < 0 || stt >= skinheight)
-               {
-                       Con_Printf("%s has an invalid skin coordinate (%i %i) on vert %i, changing to 0 0\n", loadmodel->name, sts, stt, i);
-                       sts = 0;
-                       stt = 0;
-               }
-               loadmodel->surfmesh.data_texcoordtexture2f[i*2+0] = sts * iskinwidth;
-               loadmodel->surfmesh.data_texcoordtexture2f[i*2+1] = stt * iskinheight;
-       }
+               if (j < mod->nummodelsurfaces)
+                       mod->DrawSky = R_Q1BSP_DrawSky;
 
-       Mem_Free(md2verthash);
-       Mem_Free(md2verthashdata);
+               for (j = 0;j < mod->nummodelsurfaces;j++)
+                       if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA))
+                               break;
+               if (j < mod->nummodelsurfaces)
+                       mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
 
-       // generate ushort elements array if possible
-       if (loadmodel->surfmesh.num_vertices <= 65536)
-               loadmodel->surfmesh.data_element3s = (unsigned short *)Mem_Alloc(loadmodel->mempool, sizeof(unsigned short[3]) * loadmodel->surfmesh.num_triangles);
-
-       // load the frames
-       datapointer = (base + LittleLong(pinmodel->ofs_frames));
-       for (i = 0;i < loadmodel->surfmesh.num_morphframes;i++)
-       {
-               int k;
-               trivertx_t *v;
-               trivertx_t *out;
-               pinframe = (md2frame_t *)datapointer;
-               datapointer += sizeof(md2frame_t);
-               // store the frame scale/translate into the appropriate array
-               for (j = 0;j < 3;j++)
-               {
-                       loadmodel->surfmesh.data_morphmd2framesize6f[i*6+j] = LittleFloat(pinframe->scale[j]);
-                       loadmodel->surfmesh.data_morphmd2framesize6f[i*6+3+j] = LittleFloat(pinframe->translate[j]);
-               }
-               // convert the vertices
-               v = (trivertx_t *)datapointer;
-               out = loadmodel->surfmesh.data_morphmdlvertex + i * loadmodel->surfmesh.num_vertices;
-               for (k = 0;k < loadmodel->surfmesh.num_vertices;k++)
-                       out[k] = v[vertremap[k]];
-               datapointer += numxyz * sizeof(trivertx_t);
+               Mod_MakeCollisionBIH(mod, true, &mod->collision_bih);
+               mod->render_bih = mod->collision_bih;
 
-               strlcpy(loadmodel->animscenes[i].name, pinframe->name, sizeof(loadmodel->animscenes[i].name));
-               loadmodel->animscenes[i].firstframe = i;
-               loadmodel->animscenes[i].framecount = 1;
-               loadmodel->animscenes[i].framerate = 10;
-               loadmodel->animscenes[i].loop = true;
+               // generate VBOs and other shared data before cloning submodels
+               if (i == 0)
+                       Mod_BuildVBOs();
        }
+       mod = loadmodel;
+       Mem_Free(submodelfirstsurface);
 
-       Mem_Free(vertremap);
-
-       Mod_MakeSortedSurfaces(loadmodel);
-       Mod_BuildTriangleNeighbors(loadmodel->surfmesh.data_neighbor3i, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles);
-       Mod_Alias_CalculateBoundingBox();
-       Mod_Alias_MorphMesh_CompileFrames();
-
-       surface = loadmodel->data_surfaces;
-       surface->texture = loadmodel->data_textures;
-       surface->num_firsttriangle = 0;
-       surface->num_triangles = loadmodel->surfmesh.num_triangles;
-       surface->num_firstvertex = 0;
-       surface->num_vertices = loadmodel->surfmesh.num_vertices;
-
-       loadmodel->surfmesh.isanimated = false;
-
-       if (loadmodel->surfmesh.data_element3s)
-               for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
-                       loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
-#endif
+       Con_DPrintf("Stats for obj model \"%s\": %i faces, %i nodes, %i leafs, %i clusters, %i clusterportals, mesh: %i vertices, %i triangles, %i surfaces\n", loadmodel->name, loadmodel->num_surfaces, loadmodel->brush.num_nodes, loadmodel->brush.num_leafs, mod->brush.num_pvsclusters, loadmodel->brush.num_portals, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->num_surfaces);
 }
-#endif // !OBJASMODEL
 
 qboolean Mod_CanSeeBox_Trace(int numsamples, float t, dp_model_t *model, vec3_t eye, vec3_t minsX, vec3_t maxsX)
 {