]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - model_brush.c
implemented omnidirectional shadowmapping using depth textures (2D, Rect
[xonotic/darkplaces.git] / model_brush.c
index 545be9100d627ab793ff0f08b3422503c9da2bf7..03009ddfbc93849dfe8e212155c54a64fdb8912d 100644 (file)
@@ -27,22 +27,24 @@ 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 halflifebsp = {0, "halflifebsp", "0", "indicates the current map is hlbsp format (useful to know because of different bounding box sizes)"};
 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", "1", "minimum number of subdivisions (values above 1 will smooth curves that don't need it)"};
+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)"};
 cvar_t r_subdivisions_maxtess = {0, "r_subdivisions_maxtess", "1024", "maximum number of subdivisions (prevents curves beyond a certain detail level, limits smoothing)"};
 cvar_t r_subdivisions_maxvertices = {0, "r_subdivisions_maxvertices", "65536", "maximum vertices allowed per subdivided curve"};
 cvar_t r_subdivisions_collision_tolerance = {0, "r_subdivisions_collision_tolerance", "15", "maximum error tolerance on curve subdivision for collision purposes (usually a larger error tolerance than for rendering)"};
-cvar_t r_subdivisions_collision_mintess = {0, "r_subdivisions_collision_mintess", "1", "minimum number of subdivisions (values above 1 will smooth curves that don't need it)"};
+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 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"};
+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"};
 cvar_t mod_q3bsp_optimizedtraceline = {0, "mod_q3bsp_optimizedtraceline", "1", "whether to use optimized traceline code for line traces (as opposed to tracebox code)"};
 cvar_t mod_q3bsp_debugtracebrush = {0, "mod_q3bsp_debugtracebrush", "0", "selects different tracebrush bsp recursion algorithms (for debugging purposes only)"};
 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)"};
 
 static texture_t mod_q1bsp_texture_solid;
 static texture_t mod_q1bsp_texture_sky;
@@ -53,7 +55,6 @@ static texture_t mod_q1bsp_texture_water;
 void Mod_BrushInit(void)
 {
 //     Cvar_RegisterVariable(&r_subdivide_size);
-       Cvar_RegisterVariable(&halflifebsp);
        Cvar_RegisterVariable(&r_novis);
        Cvar_RegisterVariable(&r_picmipworld);
        Cvar_RegisterVariable(&r_nosurftextures);
@@ -66,9 +67,12 @@ void Mod_BrushInit(void)
        Cvar_RegisterVariable(&r_subdivisions_collision_maxtess);
        Cvar_RegisterVariable(&r_subdivisions_collision_maxvertices);
        Cvar_RegisterVariable(&mod_q3bsp_curves_collisions);
+       Cvar_RegisterVariable(&mod_q3bsp_curves_collisions_stride);
+       Cvar_RegisterVariable(&mod_q3bsp_curves_stride);
        Cvar_RegisterVariable(&mod_q3bsp_optimizedtraceline);
        Cvar_RegisterVariable(&mod_q3bsp_debugtracebrush);
        Cvar_RegisterVariable(&mod_q3bsp_lightmapmergepower);
+       Cvar_RegisterVariable(&mod_q3bsp_nolightmaps);
 
        memset(&mod_q1bsp_texture_solid, 0, sizeof(mod_q1bsp_texture_solid));
        strlcpy(mod_q1bsp_texture_solid.name, "solid" , sizeof(mod_q1bsp_texture_solid.name));
@@ -411,6 +415,7 @@ static int Mod_Q1BSP_BoxTouchingVisibleLeafs(dp_model_t *model, const unsigned c
 typedef struct findnonsolidlocationinfo_s
 {
        vec3_t center;
+       vec3_t absmin, absmax;
        vec_t radius;
        vec3_t nudge;
        vec_t bestdist;
@@ -418,100 +423,128 @@ typedef struct findnonsolidlocationinfo_s
 }
 findnonsolidlocationinfo_t;
 
-static void Mod_Q1BSP_FindNonSolidLocation_r_Leaf(findnonsolidlocationinfo_t *info, mleaf_t *leaf)
+static void Mod_Q1BSP_FindNonSolidLocation_r_Triangle(findnonsolidlocationinfo_t *info, msurface_t *surface, int k)
 {
-       int i, surfacenum, k, *tri, *mark;
+       int i, *tri;
        float dist, f, vert[3][3], edge[3][3], facenormal[3], edgenormal[3][3], point[3];
+
+       tri = (info->model->surfmesh.data_element3i + 3 * surface->num_firsttriangle) + k * 3;
+       VectorCopy((info->model->surfmesh.data_vertex3f + tri[0] * 3), vert[0]);
+       VectorCopy((info->model->surfmesh.data_vertex3f + tri[1] * 3), vert[1]);
+       VectorCopy((info->model->surfmesh.data_vertex3f + tri[2] * 3), vert[2]);
+       VectorSubtract(vert[1], vert[0], edge[0]);
+       VectorSubtract(vert[2], vert[1], edge[1]);
+       CrossProduct(edge[1], edge[0], facenormal);
+       if (facenormal[0] || facenormal[1] || facenormal[2])
+       {
+               VectorNormalize(facenormal);
+               f = DotProduct(info->center, facenormal) - DotProduct(vert[0], facenormal);
+               if (f <= info->bestdist && f >= -info->bestdist)
+               {
+                       VectorSubtract(vert[0], vert[2], edge[2]);
+                       VectorNormalize(edge[0]);
+                       VectorNormalize(edge[1]);
+                       VectorNormalize(edge[2]);
+                       CrossProduct(facenormal, edge[0], edgenormal[0]);
+                       CrossProduct(facenormal, edge[1], edgenormal[1]);
+                       CrossProduct(facenormal, edge[2], edgenormal[2]);
+                       // face distance
+                       if (DotProduct(info->center, edgenormal[0]) < DotProduct(vert[0], edgenormal[0])
+                                       && DotProduct(info->center, edgenormal[1]) < DotProduct(vert[1], edgenormal[1])
+                                       && DotProduct(info->center, edgenormal[2]) < DotProduct(vert[2], edgenormal[2]))
+                       {
+                               // we got lucky, the center is within the face
+                               dist = DotProduct(info->center, facenormal) - DotProduct(vert[0], facenormal);
+                               if (dist < 0)
+                               {
+                                       dist = -dist;
+                                       if (info->bestdist > dist)
+                                       {
+                                               info->bestdist = dist;
+                                               VectorScale(facenormal, (info->radius - -dist), info->nudge);
+                                       }
+                               }
+                               else
+                               {
+                                       if (info->bestdist > dist)
+                                       {
+                                               info->bestdist = dist;
+                                               VectorScale(facenormal, (info->radius - dist), info->nudge);
+                                       }
+                               }
+                       }
+                       else
+                       {
+                               // check which edge or vertex the center is nearest
+                               for (i = 0;i < 3;i++)
+                               {
+                                       f = DotProduct(info->center, edge[i]);
+                                       if (f >= DotProduct(vert[0], edge[i])
+                                                       && f <= DotProduct(vert[1], edge[i]))
+                                       {
+                                               // on edge
+                                               VectorMA(info->center, -f, edge[i], point);
+                                               dist = sqrt(DotProduct(point, point));
+                                               if (info->bestdist > dist)
+                                               {
+                                                       info->bestdist = dist;
+                                                       VectorScale(point, (info->radius / dist), info->nudge);
+                                               }
+                                               // skip both vertex checks
+                                               // (both are further away than this edge)
+                                               i++;
+                                       }
+                                       else
+                                       {
+                                               // not on edge, check first vertex of edge
+                                               VectorSubtract(info->center, vert[i], point);
+                                               dist = sqrt(DotProduct(point, point));
+                                               if (info->bestdist > dist)
+                                               {
+                                                       info->bestdist = dist;
+                                                       VectorScale(point, (info->radius / dist), info->nudge);
+                                               }
+                                       }
+                               }
+                       }
+               }
+       }
+}
+
+static void Mod_Q1BSP_FindNonSolidLocation_r_Leaf(findnonsolidlocationinfo_t *info, mleaf_t *leaf)
+{
+       int surfacenum, k, *mark;
        msurface_t *surface;
        for (surfacenum = 0, mark = leaf->firstleafsurface;surfacenum < leaf->numleafsurfaces;surfacenum++, mark++)
        {
                surface = info->model->data_surfaces + *mark;
                if (surface->texture->supercontents & SUPERCONTENTS_SOLID)
                {
-                       for (k = 0;k < surface->num_triangles;k++)
+                       if(surface->num_bboxstride)
                        {
-                               tri = (info->model->surfmesh.data_element3i + 3 * surface->num_firsttriangle) + k * 3;
-                               VectorCopy((info->model->surfmesh.data_vertex3f + tri[0] * 3), vert[0]);
-                               VectorCopy((info->model->surfmesh.data_vertex3f + tri[1] * 3), vert[1]);
-                               VectorCopy((info->model->surfmesh.data_vertex3f + tri[2] * 3), vert[2]);
-                               VectorSubtract(vert[1], vert[0], edge[0]);
-                               VectorSubtract(vert[2], vert[1], edge[1]);
-                               CrossProduct(edge[1], edge[0], facenormal);
-                               if (facenormal[0] || facenormal[1] || facenormal[2])
+                               int i, cnt, tri;
+                               cnt = (surface->num_triangles + surface->num_bboxstride - 1) / surface->num_bboxstride;
+                               for(i = 0; i < cnt; ++i)
                                {
-                                       VectorNormalize(facenormal);
-                                       f = DotProduct(info->center, facenormal) - DotProduct(vert[0], facenormal);
-                                       if (f <= info->bestdist && f >= -info->bestdist)
+                                       if(BoxesOverlap(surface->data_bbox6f + i * 6, surface->data_bbox6f + i * 6 + 3, info->absmin, info->absmax))
                                        {
-                                               VectorSubtract(vert[0], vert[2], edge[2]);
-                                               VectorNormalize(edge[0]);
-                                               VectorNormalize(edge[1]);
-                                               VectorNormalize(edge[2]);
-                                               CrossProduct(facenormal, edge[0], edgenormal[0]);
-                                               CrossProduct(facenormal, edge[1], edgenormal[1]);
-                                               CrossProduct(facenormal, edge[2], edgenormal[2]);
-                                               // face distance
-                                               if (DotProduct(info->center, edgenormal[0]) < DotProduct(vert[0], edgenormal[0])
-                                                && DotProduct(info->center, edgenormal[1]) < DotProduct(vert[1], edgenormal[1])
-                                                && DotProduct(info->center, edgenormal[2]) < DotProduct(vert[2], edgenormal[2]))
-                                               {
-                                                       // we got lucky, the center is within the face
-                                                       dist = DotProduct(info->center, facenormal) - DotProduct(vert[0], facenormal);
-                                                       if (dist < 0)
-                                                       {
-                                                               dist = -dist;
-                                                               if (info->bestdist > dist)
-                                                               {
-                                                                       info->bestdist = dist;
-                                                                       VectorScale(facenormal, (info->radius - -dist), info->nudge);
-                                                               }
-                                                       }
-                                                       else
-                                                       {
-                                                               if (info->bestdist > dist)
-                                                               {
-                                                                       info->bestdist = dist;
-                                                                       VectorScale(facenormal, (info->radius - dist), info->nudge);
-                                                               }
-                                                       }
-                                               }
-                                               else
+                                               for(k = 0; k < surface->num_bboxstride; ++k)
                                                {
-                                                       // check which edge or vertex the center is nearest
-                                                       for (i = 0;i < 3;i++)
-                                                       {
-                                                               f = DotProduct(info->center, edge[i]);
-                                                               if (f >= DotProduct(vert[0], edge[i])
-                                                                && f <= DotProduct(vert[1], edge[i]))
-                                                               {
-                                                                       // on edge
-                                                                       VectorMA(info->center, -f, edge[i], point);
-                                                                       dist = sqrt(DotProduct(point, point));
-                                                                       if (info->bestdist > dist)
-                                                                       {
-                                                                               info->bestdist = dist;
-                                                                               VectorScale(point, (info->radius / dist), info->nudge);
-                                                                       }
-                                                                       // skip both vertex checks
-                                                                       // (both are further away than this edge)
-                                                                       i++;
-                                                               }
-                                                               else
-                                                               {
-                                                                       // not on edge, check first vertex of edge
-                                                                       VectorSubtract(info->center, vert[i], point);
-                                                                       dist = sqrt(DotProduct(point, point));
-                                                                       if (info->bestdist > dist)
-                                                                       {
-                                                                               info->bestdist = dist;
-                                                                               VectorScale(point, (info->radius / dist), info->nudge);
-                                                                       }
-                                                               }
-                                                       }
+                                                       tri = i * surface->num_bboxstride + k;
+                                                       if(tri >= surface->num_triangles)
+                                                               break;
+                                                       Mod_Q1BSP_FindNonSolidLocation_r_Triangle(info, surface, tri);
                                                }
                                        }
                                }
                        }
+                       else
+                       {
+                               for (k = 0;k < surface->num_triangles;k++)
+                               {
+                                       Mod_Q1BSP_FindNonSolidLocation_r_Triangle(info, surface, k);
+                               }
+                       }
                }
        }
 }
@@ -550,6 +583,14 @@ static void Mod_Q1BSP_FindNonSolidLocation(dp_model_t *model, const vec3_t in, v
        {
                VectorClear(info.nudge);
                info.bestdist = radius;
+               VectorCopy(info.center, info.absmin);
+               VectorCopy(info.center, info.absmax);
+               info.absmin[0] -= info.radius + 1;
+               info.absmin[1] -= info.radius + 1;
+               info.absmin[2] -= info.radius + 1;
+               info.absmax[0] += info.radius + 1;
+               info.absmax[1] += info.radius + 1;
+               info.absmax[2] += info.radius + 1;
                Mod_Q1BSP_FindNonSolidLocation_r(&info, model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode);
                VectorAdd(info.center, info.nudge, info.center);
        }
@@ -564,7 +605,7 @@ int Mod_Q1BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativeconte
                case CONTENTS_EMPTY:
                        return 0;
                case CONTENTS_SOLID:
-                       return SUPERCONTENTS_SOLID;
+                       return SUPERCONTENTS_SOLID | SUPERCONTENTS_OPAQUE;
                case CONTENTS_WATER:
                        return SUPERCONTENTS_WATER;
                case CONTENTS_SLIME:
@@ -572,7 +613,7 @@ int Mod_Q1BSP_SuperContentsFromNativeContents(dp_model_t *model, int nativeconte
                case CONTENTS_LAVA:
                        return SUPERCONTENTS_LAVA | SUPERCONTENTS_NODROP;
                case CONTENTS_SKY:
-                       return SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP;
+                       return SUPERCONTENTS_SKY | SUPERCONTENTS_NODROP | SUPERCONTENTS_OPAQUE; // to match behaviour of Q3 maps, let sky count as opaque
        }
        return 0;
 }
@@ -1356,7 +1397,6 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                        tx->skinframerate = 1;
                        tx->skinframes[0] = skinframe;
                        tx->currentskinframe = tx->skinframes[0];
-                       tx->basematerialflags = 0;
                }
                tx->basematerialflags = MATERIALFLAG_WALL;
                if (i == loadmodel->num_textures - 1)
@@ -1486,23 +1526,20 @@ 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 == 256 && mtheight == 128)
                        {
-                               if (loadmodel->isworldmodel)
+                               data = loadimagepixelsbgra(tx->name, false, false);
+                               if (data && image_width == 256 && image_height == 128)
                                {
-                                       data = loadimagepixelsbgra(tx->name, false, false);
-                                       if (data && image_width == 256 && image_height == 128)
-                                       {
-                                               R_Q1BSP_LoadSplitSky(data, image_width, image_height, 4);
-                                               Mem_Free(data);
-                                       }
-                                       else if (mtdata != NULL)
-                                               R_Q1BSP_LoadSplitSky(mtdata, mtwidth, mtheight, 1);
+                                       R_Q1BSP_LoadSplitSky(data, image_width, image_height, 4);
+                                       Mem_Free(data);
                                }
+                               else if (mtdata != NULL)
+                                       R_Q1BSP_LoadSplitSky(mtdata, mtwidth, mtheight, 1);
                        }
                        else
                        {
-                               skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va("textures/%s/%s", mapname, tx->name), TEXF_MIPMAP | TEXF_PRECACHE | (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_PRECACHE | (r_picmipworld.integer ? TEXF_PICMIP : 0) | TEXF_COMPRESS, false);
                                if (!skinframe)
-                                       skinframe = R_SkinFrame_LoadExternal(gamemode == GAME_TENEBRAE ? tx->name : va("textures/%s", tx->name), TEXF_MIPMAP | TEXF_PRECACHE | (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_PRECACHE | (r_picmipworld.integer ? TEXF_PICMIP : 0) | TEXF_COMPRESS, false);
                                if (!skinframe)
                                {
                                        // did not find external texture, load it from the bsp or wad3
@@ -1519,13 +1556,13 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                                                {
                                                        tx->width = image_width;
                                                        tx->height = image_height;
-                                                       skinframe = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_MIPMAP | TEXF_PRECACHE | (r_picmipworld.integer ? TEXF_PICMIP : 0), pixels, image_width, image_height);
+                                                       skinframe = R_SkinFrame_LoadInternalBGRA(tx->name, TEXF_ALPHA | TEXF_MIPMAP | TEXF_PRECACHE | (r_picmipworld.integer ? TEXF_PICMIP : 0), pixels, image_width, image_height);
                                                }
                                                if (freepixels)
                                                        Mem_Free(freepixels);
                                        }
                                        else if (mtdata) // texture included
-                                               skinframe = R_SkinFrame_LoadInternalQuake(tx->name, TEXF_MIPMAP | TEXF_PRECACHE | (r_picmipworld.integer ? TEXF_PICMIP : 0), false, r_fullbrights.integer, mtdata, tx->width, tx->height);
+                                               skinframe = R_SkinFrame_LoadInternalQuake(tx->name, TEXF_ALPHA | TEXF_MIPMAP | TEXF_PRECACHE | (r_picmipworld.integer ? TEXF_PICMIP : 0), false, r_fullbrights.integer, mtdata, tx->width, tx->height);
                                }
                                // if skinframe is still NULL the "missing" texture will be used
                                if (skinframe)
@@ -1561,7 +1598,7 @@ static void Mod_Q1BSP_LoadTextures(lump_t *l)
                        else if (!strncmp(tx->name, "sky", 3))
                                tx->basematerialflags = MATERIALFLAG_SKY | MATERIALFLAG_NOSHADOW;
                        else if (!strcmp(tx->name, "caulk"))
-                               tx->basematerialflags = MATERIALFLAG_NODRAW;
+                               tx->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
                        else if (tx->skinframes[0] && tx->skinframes[0]->fog)
                                tx->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
 
@@ -1772,7 +1809,6 @@ static void Mod_Q1BSP_LoadVisibility(lump_t *l)
 static void Mod_Q1BSP_ParseWadsFromEntityLump(const char *data)
 {
        char key[128], value[4096];
-       char wadname[128];
        int i, j, k;
        if (!data)
                return;
@@ -1814,9 +1850,7 @@ static void Mod_Q1BSP_ParseWadsFromEntityLump(const char *data)
                                                {
                                                        k = value[i];
                                                        value[i] = 0;
-                                                       strlcpy(wadname, "textures/", sizeof(wadname));
-                                                       strlcat(wadname, &value[j], sizeof(wadname));
-                                                       W_LoadTextureWadFile(wadname, false);
+                                                       W_LoadTextureWadFile(&value[j], false);
                                                        j = i+1;
                                                        if (!k)
                                                                break;
@@ -1833,8 +1867,9 @@ static void Mod_Q1BSP_LoadEntities(lump_t *l)
        loadmodel->brush.entities = NULL;
        if (!l->filelen)
                return;
-       loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, l->filelen);
+       loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, l->filelen + 1);
        memcpy(loadmodel->brush.entities, mod_base + l->fileofs, l->filelen);
+       loadmodel->brush.entities[l->filelen] = 0;
        if (loadmodel->brush.ishlbsp)
                Mod_Q1BSP_ParseWadsFromEntityLump(loadmodel->brush.entities);
 }
@@ -2347,6 +2382,7 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                if (i == -1)
                {
                        surface->lightmapinfo->samples = NULL;
+#if 0
                        // give non-lightmapped water a 1x white lightmap
                        if (surface->texture->name[0] == '*' && (surface->lightmapinfo->texinfo->flags & TEX_SPECIAL) && ssize <= 256 && tsize <= 256)
                        {
@@ -2354,6 +2390,7 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                                surface->lightmapinfo->styles[0] = 0;
                                memset(surface->lightmapinfo->samples, 128, ssize * tsize * 3);
                        }
+#endif
                }
                else if (loadmodel->brush.ishlbsp) // LordHavoc: HalfLife map (bsp version 30)
                        surface->lightmapinfo->samples = loadmodel->brushq1.lightdata + i;
@@ -2400,6 +2437,7 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
        // now that we've decided the lightmap texture size, we can do the rest
        if (cls.state != ca_dedicated)
        {
+               int stainmapsize = 0;
                struct alloc_lm_state allocState;
 
                for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
@@ -2407,10 +2445,14 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                        int i, iu, iv, lightmapx = 0, lightmapy = 0;
                        float u, v, ubase, vbase, uscale, vscale;
 
+                       if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
+                               continue;
+
                        smax = surface->lightmapinfo->extents[0] >> 4;
                        tmax = surface->lightmapinfo->extents[1] >> 4;
                        ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
                        tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
+                       stainmapsize += ssize * tsize * 3;
 
                        if (!lightmaptexture || !Mod_Q1BSP_AllocLightmapBlock(&allocState, lightmapsize, lightmapsize, ssize, tsize, &lightmapx, &lightmapy))
                        {
@@ -2446,26 +2488,19 @@ static void Mod_Q1BSP_LoadFaces(lump_t *l)
                                iv = (int) v;
                                (loadmodel->surfmesh.data_lightmapoffsets + surface->num_firstvertex)[i] = (bound(0, iv, tmax) * ssize + bound(0, iu, smax)) * 3;
                        }
-
                }
 
                if (cl_stainmaps.integer)
                {
-                       // allocate stainmaps for permanent marks on walls
-                       int stainmapsize = 0;
+                       // allocate stainmaps for permanent marks on walls and clear white
                        unsigned char *stainsamples = NULL;
-                       for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
-                       {
-                               ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
-                               tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
-                               stainmapsize += ssize * tsize * 3;
-                       }
-                       // allocate and clear to white
                        stainsamples = (unsigned char *)Mem_Alloc(loadmodel->mempool, stainmapsize);
                        memset(stainsamples, 255, stainmapsize);
                        // assign pointers
                        for (surfacenum = 0, surface = loadmodel->data_surfaces;surfacenum < count;surfacenum++, surface++)
                        {
+                               if (!loadmodel->brushq1.lightmapupdateflags[surfacenum])
+                                       continue;
                                ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
                                tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
                                surface->lightmapinfo->stainsamples = stainsamples;
@@ -2617,7 +2652,7 @@ static void Mod_Q1BSP_LoadLeafs(lump_t *l)
 
                out->firstleafsurface = loadmodel->brush.data_leafsurfaces + (unsigned short)LittleShort(in->firstmarksurface);
                out->numleafsurfaces = (unsigned short)LittleShort(in->nummarksurfaces);
-               if (out->firstleafsurface < 0 || (unsigned short)LittleShort(in->firstmarksurface) + out->numleafsurfaces > loadmodel->brush.num_leafsurfaces)
+               if ((unsigned short)LittleShort(in->firstmarksurface) + out->numleafsurfaces > loadmodel->brush.num_leafsurfaces)
                {
                        Con_Printf("Mod_Q1BSP_LoadLeafs: invalid leafsurface range %i:%i outside range %i:%i\n", (int)(out->firstleafsurface - loadmodel->brush.data_leafsurfaces), (int)(out->firstleafsurface + out->numleafsurfaces - loadmodel->brush.data_leafsurfaces), 0, loadmodel->brush.num_leafsurfaces);
                        out->firstleafsurface = NULL;
@@ -3380,7 +3415,7 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        dheader_t *header;
        dmodel_t *bm;
        mempool_t *mainmempool;
-       float dist, modelyawradius, modelradius, *vec;
+       float dist, modelyawradius, modelradius;
        msurface_t *surface;
        int numshadowmeshtriangles;
        hullinfo_t hullinfo;
@@ -3448,9 +3483,14 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        mod->brush.AmbientSoundLevelsForPoint = Mod_Q1BSP_AmbientSoundLevelsForPoint;
        mod->brush.RoundUpToHullSize = Mod_Q1BSP_RoundUpToHullSize;
        mod->brush.PointInLeaf = Mod_Q1BSP_PointInLeaf;
-
-       if (loadmodel->isworldmodel)
-               Cvar_SetValue("halflifebsp", mod->brush.ishlbsp);
+       mod->Draw = R_Q1BSP_Draw;
+       mod->DrawDepth = R_Q1BSP_DrawDepth;
+       mod->DrawDebug = R_Q1BSP_DrawDebug;
+       mod->GetLightInfo = R_Q1BSP_GetLightInfo;
+       mod->DrawShadowMap = R_Q1BSP_DrawShadowMap;
+       mod->CompileShadowVolume = R_Q1BSP_CompileShadowVolume;
+       mod->DrawShadowVolume = R_Q1BSP_DrawShadowVolume;
+       mod->DrawLight = R_Q1BSP_DrawLight;
 
 // load into heap
 
@@ -3556,21 +3596,26 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                if (i > 0)
                {
                        char name[10];
-                       // LordHavoc: only register submodels if it is the world
-                       // (prevents external bsp models from replacing world submodels with
-                       //  their own)
-                       if (!loadmodel->isworldmodel)
-                               continue;
                        // duplicate the basic information
                        dpsnprintf(name, sizeof(name), "*%i", i);
-                       mod = Mod_FindName(name);
+                       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.TraceLineOfSight = 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;
@@ -3591,75 +3636,48 @@ void Mod_Q1BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                mod->nummodelsurfaces = bm->numfaces;
 
                // make the model surface list (used by shadowing/lighting)
-               mod->surfacelist = (int *)datapointer;datapointer += mod->nummodelsurfaces * sizeof(int);
-               for (j = 0;j < mod->nummodelsurfaces;j++)
-                       mod->surfacelist[j] = mod->firstmodelsurface + j;
+               mod->sortedmodelsurfaces = (int *)datapointer;datapointer += mod->nummodelsurfaces * sizeof(int);
+               Mod_MakeSortedSurfaces(mod);
 
-               // this gets altered below if sky or water is used
-               mod->DrawSky = NULL;
-               mod->DrawAddWaterPlanes = NULL;
-               mod->Draw = R_Q1BSP_Draw;
-               mod->DrawDepth = R_Q1BSP_DrawDepth;
-               mod->DrawDebug = R_Q1BSP_DrawDebug;
-               mod->GetLightInfo = R_Q1BSP_GetLightInfo;
-               mod->CompileShadowVolume = R_Q1BSP_CompileShadowVolume;
-               mod->DrawShadowVolume = R_Q1BSP_DrawShadowVolume;
-               mod->DrawLight = R_Q1BSP_DrawLight;
-               if (i != 0)
-               {
-                       mod->brush.TraceLineOfSight = 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;
-               }
                // copy the submodel bounds, then enlarge the yaw and rotated bounds according to radius
+               // (previously this code measured the radius of the vertices of surfaces in the submodel, but that broke submodels that contain only CLIP brushes, which do not produce surfaces)
                VectorCopy(bm->mins, mod->normalmins);
                VectorCopy(bm->maxs, mod->normalmaxs);
-               VectorCopy(bm->mins, mod->yawmins);
-               VectorCopy(bm->maxs, mod->yawmaxs);
-               VectorCopy(bm->mins, mod->rotatedmins);
-               VectorCopy(bm->maxs, mod->rotatedmaxs);
+               dist = max(fabs(mod->normalmins[0]), fabs(mod->normalmaxs[0]));
+               modelyawradius = max(fabs(mod->normalmins[1]), fabs(mod->normalmaxs[1]));
+               modelyawradius = dist*dist+modelyawradius*modelyawradius;
+               modelradius = max(fabs(mod->normalmins[2]), fabs(mod->normalmaxs[2]));
+               modelradius = modelyawradius + modelradius * modelradius;
+               modelyawradius = sqrt(modelyawradius);
+               modelradius = sqrt(modelradius);
+               mod->yawmins[0] = mod->yawmins[1] = -modelyawradius;
+               mod->yawmins[2] = mod->normalmins[2];
+               mod->yawmaxs[0] = mod->yawmaxs[1] =  modelyawradius;
+               mod->yawmaxs[2] = mod->normalmaxs[2];
+               mod->rotatedmins[0] = mod->rotatedmins[1] = mod->rotatedmins[2] = -modelradius;
+               mod->rotatedmaxs[0] = mod->rotatedmaxs[1] = mod->rotatedmaxs[2] =  modelradius;
+               mod->radius = modelradius;
+               mod->radius2 = modelradius * modelradius;
+
+               // this gets altered below if sky or water is used
+               mod->DrawSky = NULL;
+               mod->DrawAddWaterPlanes = NULL;
+
+               // scan surfaces for sky and water and flag the submodel as possessing these features or not
+               // build lightstyle lists for quick marking of dirty lightmaps when lightstyles flicker
                if (mod->nummodelsurfaces)
                {
-                       modelyawradius = 0;
-                       modelradius = 0;
                        for (j = 0, surface = &mod->data_surfaces[mod->firstmodelsurface];j < mod->nummodelsurfaces;j++, surface++)
-                       {
-                               // we only need to have a drawsky function if it is used(usually only on world model)
                                if (surface->texture->basematerialflags & MATERIALFLAG_SKY)
-                                       mod->DrawSky = R_Q1BSP_DrawSky;
+                                       break;
+                       if (j < mod->nummodelsurfaces)
+                               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))
-                                       mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
-                               // calculate bounding shapes
-                               for (k = 0, vec = (loadmodel->surfmesh.data_vertex3f + 3 * surface->num_firstvertex);k < surface->num_vertices;k++, vec += 3)
-                               {
-                                       dist = vec[0]*vec[0]+vec[1]*vec[1];
-                                       if (modelyawradius < dist)
-                                               modelyawradius = dist;
-                                       dist += vec[2]*vec[2];
-                                       if (modelradius < dist)
-                                               modelradius = dist;
-                               }
-                       }
-                       modelyawradius = sqrt(modelyawradius);
-                       modelradius = sqrt(modelradius);
-                       mod->yawmins[0] = min(mod->yawmins[0], -modelyawradius);
-                       mod->yawmaxs[0] = min(mod->yawmaxs[0], -modelyawradius);
-                       mod->yawmins[1] = min(mod->yawmins[1],  modelyawradius);
-                       mod->yawmaxs[1] = min(mod->yawmaxs[1],  modelyawradius);
-                       mod->rotatedmins[0] = min(mod->rotatedmins[0], -modelradius);
-                       mod->rotatedmaxs[0] = min(mod->rotatedmaxs[0],  modelradius);
-                       mod->rotatedmins[1] = min(mod->rotatedmins[1], -modelradius);
-                       mod->rotatedmaxs[1] = min(mod->rotatedmaxs[1],  modelradius);
-                       mod->rotatedmins[2] = min(mod->rotatedmins[2], -modelradius);
-                       mod->rotatedmaxs[2] = min(mod->rotatedmaxs[2],  modelradius);
-                       mod->radius = modelradius;
-                       mod->radius2 = modelradius * modelradius;
+                                       break;
+                       if (j < mod->nummodelsurfaces)
+                               mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
 
                        // build lightstyle update chains
                        // (used to rapidly mark lightmapupdateflags on many surfaces
@@ -4109,9 +4127,6 @@ void static Mod_Q2BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        i = LittleLong(header->version);
        if (i != Q2BSPVERSION)
                Host_Error("Mod_Q2BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q2BSPVERSION);
-       mod->brush.ishlbsp = false;
-       if (loadmodel->isworldmodel)
-               Cvar_SetValue("halflifebsp", mod->brush.ishlbsp);
 
        mod_base = (unsigned char *)header;
 
@@ -4165,8 +4180,9 @@ static void Mod_Q3BSP_LoadEntities(lump_t *l)
        loadmodel->brushq3.num_lightgrid_cellsize[2] = 128;
        if (!l->filelen)
                return;
-       loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, l->filelen);
+       loadmodel->brush.entities = (char *)Mem_Alloc(loadmodel->mempool, l->filelen + 1);
        memcpy(loadmodel->brush.entities, mod_base + l->fileofs, l->filelen);
+       loadmodel->brush.entities[l->filelen] = 0;
        data = loadmodel->brush.entities;
        // some Q3 maps override the lightgrid_cellsize with a worldspawn key
        if (data && COM_ParseToken_Simple(&data, false, false) && com_token[0] == '{')
@@ -4358,6 +4374,9 @@ static void Mod_Q3BSP_LoadBrushes(lump_t *l)
                }
                // make the colbrush from the planes
                out->colbrushf = Collision_NewBrushFromPlanes(loadmodel->mempool, out->numbrushsides, planes, out->texture->supercontents);
+
+               // this whole loop can take a while (e.g. on redstarrepublic4)
+               CL_KeepaliveMessage(false);
        }
        if (planes)
                Mem_Free(planes);
@@ -4455,19 +4474,85 @@ static void Mod_Q3BSP_LoadTriangles(lump_t *l)
 
 static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
 {
-       q3dlightmap_t *in;
+       q3dlightmap_t *input_pointer;
        int i, j, k, count, power, power2, mask, endlightmap, mergewidth, mergeheight;
        unsigned char *c;
-       unsigned char convertedpixels[128*128*4];
 
-       if (!l->filelen)
-               return;
+       unsigned char *convertedpixels;
+       char mapname[MAX_QPATH];
+       int size, bytesperpixel, rgbmap[3];
+       qboolean external;
+       unsigned char *inpixels[10000]; // max count q3map2 can output (it uses 4 digits)
+
+       // defaults for q3bsp
+       size = 128;
+       bytesperpixel = 3;
+       rgbmap[0] = 2;
+       rgbmap[1] = 1;
+       rgbmap[2] = 0;
+       external = false;
+       loadmodel->brushq3.lightmapsize = 128;
+
        if (cls.state == ca_dedicated)
                return;
-       in = (q3dlightmap_t *)(mod_base + l->fileofs);
-       if (l->filelen % sizeof(*in))
-               Host_Error("Mod_Q3BSP_LoadLightmaps: funny lump size in %s",loadmodel->name);
-       count = l->filelen / sizeof(*in);
+
+       if(mod_q3bsp_nolightmaps.integer)
+       {
+               return;
+       }
+       else if(l->filelen)
+       {
+               // prefer internal LMs for compatibility (a BSP contains no info on whether external LMs exist)
+               if (developer_loading.integer)
+                       Con_Printf("Using internal lightmaps\n");
+               input_pointer = (q3dlightmap_t *)(mod_base + l->fileofs);
+               if (l->filelen % sizeof(*input_pointer))
+                       Host_Error("Mod_Q3BSP_LoadLightmaps: funny lump size in %s",loadmodel->name);
+               count = l->filelen / sizeof(*input_pointer);
+               for(i = 0; i < count; ++i)
+                       inpixels[i] = input_pointer[i].rgb;
+       }
+       else
+       {
+               // no internal lightmaps
+               // try external lightmaps
+               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);
+               if(!inpixels[0])
+                       return;
+
+               // using EXTERNAL lightmaps instead
+               if(image_width != (int) CeilPowerOf2(image_width) || image_width != image_height)
+               {
+                       Mem_Free(inpixels[0]);
+                       Host_Error("Mod_Q3BSP_LoadLightmaps: invalid external lightmap size in %s",loadmodel->name);
+               }
+
+               size = image_width;
+               bytesperpixel = 4;
+               rgbmap[0] = 0;
+               rgbmap[1] = 1;
+               rgbmap[2] = 2;
+               external = true;
+
+               for(count = 1; ; ++count)
+               {
+                       inpixels[count] = loadimagepixelsbgra(va("%s/lm_%04d", mapname, count), false, false);
+                       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);
+                       }
+               }
+       }
+
+       convertedpixels = (unsigned char *) Mem_Alloc(tempmempool, size*size*4);
+       loadmodel->brushq3.lightmapsize = size;
        loadmodel->brushq3.num_originallightmaps = count;
 
        // now check the surfaces to see if any of them index an odd numbered
@@ -4510,11 +4595,17 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
        // blank lightmaps, which must be handled properly as well
        if (endlightmap == 1 && count > 1)
        {
-               c = in[1].rgb;
-               for (i = 0;i < 128*128*3;i++)
-                       if (c[i])
+               c = inpixels[1];
+               for (i = 0;i < size*size;i++)
+               {
+                       if (c[bytesperpixel*i + rgbmap[0]])
+                               break;
+                       if (c[bytesperpixel*i + rgbmap[1]])
+                               break;
+                       if (c[bytesperpixel*i + rgbmap[2]])
                                break;
-               if (i == 128*128*3)
+               }
+               if (i == size*size)
                {
                        // all pixels in the unused lightmap were black...
                        loadmodel->brushq3.deluxemapping = false;
@@ -4524,12 +4615,19 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
        Con_DPrintf("%s is %sdeluxemapped\n", loadmodel->name, loadmodel->brushq3.deluxemapping ? "" : "not ");
 
        // figure out what the most reasonable merge power is within limits
+
        loadmodel->brushq3.num_lightmapmergepower = 0;
-       for (power = 1;power <= mod_q3bsp_lightmapmergepower.integer && (128 << power) <= gl_max_texture_size && (1 << (power * 2)) < 4 * (count >> loadmodel->brushq3.deluxemapping);power++)
+
+       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) <= gl_max_texture_size && (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 << (loadmodel->brushq3.num_lightmapmergepower * 2)) - 1) >> (loadmodel->brushq3.num_lightmapmergepower * 2);
+       loadmodel->brushq3.num_mergedlightmaps = ((count >> (loadmodel->brushq3.deluxemapping ? 1 : 0)) + (1 << (loadmodel->brushq3.num_lightmapmergepower * 2)) - 1) >> (loadmodel->brushq3.num_lightmapmergepower * 2);
        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 *));
@@ -4545,11 +4643,11 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
        {
                // figure out which merged lightmap texture this fits into
                int lightmapindex = i >> (loadmodel->brushq3.deluxemapping + power2);
-               for (k = 0;k < 128*128;k++)
+               for (k = 0;k < size*size;k++)
                {
-                       convertedpixels[k*4+2] = in[i].rgb[k*3+0];
-                       convertedpixels[k*4+1] = in[i].rgb[k*3+1];
-                       convertedpixels[k*4+0] = in[i].rgb[k*3+2];
+                       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)
@@ -4558,46 +4656,123 @@ static void Mod_Q3BSP_LoadLightmaps(lump_t *l, lump_t *faceslump)
                        if (!loadmodel->brushq3.data_lightmaps[lightmapindex])
                        {
                                // create a lightmap only as large as necessary to hold the
-                               // remaining 128x128 blocks
+                               // 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) - (lightmapindex << power2);
+                               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*128, mergeheight*128, min(j, mergewidth*mergeheight), mergewidth*mergeheight);
-                               loadmodel->brushq3.data_lightmaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("lightmap%04i", lightmapindex), mergewidth * 128, mergeheight * 128, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_PRECACHE | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), NULL);
+                                       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 | TEXF_PRECACHE | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), NULL);
                                if (loadmodel->brushq3.data_deluxemaps)
-                                       loadmodel->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("deluxemap%04i", lightmapindex), mergewidth * 128, mergeheight * 128, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_PRECACHE | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : 0), NULL);
+                                       loadmodel->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("deluxemap%04i", lightmapindex), mergewidth * size, mergeheight * size, NULL, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_PRECACHE | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : 0), NULL);
                        }
-                       mergewidth = R_TextureWidth(loadmodel->brushq3.data_lightmaps[lightmapindex]) / 128;
-                       mergeheight = R_TextureHeight(loadmodel->brushq3.data_lightmaps[lightmapindex]) / 128;
-                       j = (i >> loadmodel->brushq3.deluxemapping) & ((1 << power2) - 1);
+                       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) * 128, (j / mergewidth) * 128, 128, 128);
+                               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) * 128, (j / mergewidth) * 128, 128, 128);
+                               R_UpdateTexture(loadmodel->brushq3.data_lightmaps [lightmapindex], convertedpixels, (j % mergewidth) * size, (j / mergewidth) * size, size, size);
                }
                else
                {
                        // 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), 128, 128, convertedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_PRECACHE | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : 0), NULL);
+                               loadmodel->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("deluxemap%04i", lightmapindex), size, size, convertedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_PRECACHE | (gl_texturecompression_q3bspdeluxemaps.integer ? TEXF_COMPRESS : 0), NULL);
                        else
-                               loadmodel->brushq3.data_lightmaps [lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("lightmap%04i", lightmapindex), 128, 128, convertedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_PRECACHE | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), NULL);
+                               loadmodel->brushq3.data_lightmaps [lightmapindex] = R_LoadTexture2D(loadmodel->texturepool, va("lightmap%04i", lightmapindex), size, size, convertedpixels, TEXTYPE_BGRA, TEXF_FORCELINEAR | TEXF_PRECACHE | (gl_texturecompression_q3bsplightmaps.integer ? TEXF_COMPRESS : 0), NULL);
                }
        }
+
+       Mem_Free(convertedpixels);
+       if(external)
+       {
+               for(i = 0; i < count; ++i)
+                       Mem_Free(inpixels[i]);
+       }
 }
 
+static void Mod_Q3BSP_BuildBBoxes(const int *element3i, int num_triangles, const float *vertex3f, float **collisionbbox6f, int *collisionstride, int stride)
+{
+       int j, k, cnt, tri;
+       float *mins, *maxs;
+       const float *vert;
+       if(stride > 0)
+       {
+               *collisionstride = stride;
+               cnt = (num_triangles + stride - 1) / stride;
+               *collisionbbox6f = (float *) Mem_Alloc(loadmodel->mempool, sizeof(float[6]) * cnt);
+               for(j = 0; j < cnt; ++j)
+               {
+                       mins = &((*collisionbbox6f)[6 * j + 0]);
+                       maxs = &((*collisionbbox6f)[6 * j + 3]);
+                       for(k = 0; k < stride; ++k)
+                       {
+                               tri = j * stride + k;
+                               if(tri >= num_triangles)
+                                       break;
+                               vert = &(vertex3f[element3i[3 * tri + 0] * 3]);
+                               if(!k || vert[0] < mins[0]) mins[0] = vert[0];
+                               if(!k || vert[1] < mins[1]) mins[1] = vert[1];
+                               if(!k || vert[2] < mins[2]) mins[2] = vert[2];
+                               if(!k || vert[0] > maxs[0]) maxs[0] = vert[0];
+                               if(!k || vert[1] > maxs[1]) maxs[1] = vert[1];
+                               if(!k || vert[2] > maxs[2]) maxs[2] = vert[2];
+                               vert = &(vertex3f[element3i[3 * tri + 1] * 3]);
+                               if(vert[0] < mins[0]) mins[0] = vert[0];
+                               if(vert[1] < mins[1]) mins[1] = vert[1];
+                               if(vert[2] < mins[2]) mins[2] = vert[2];
+                               if(vert[0] > maxs[0]) maxs[0] = vert[0];
+                               if(vert[1] > maxs[1]) maxs[1] = vert[1];
+                               if(vert[2] > maxs[2]) maxs[2] = vert[2];
+                               vert = &(vertex3f[element3i[3 * tri + 2] * 3]);
+                               if(vert[0] < mins[0]) mins[0] = vert[0];
+                               if(vert[1] < mins[1]) mins[1] = vert[1];
+                               if(vert[2] < mins[2]) mins[2] = vert[2];
+                               if(vert[0] > maxs[0]) maxs[0] = vert[0];
+                               if(vert[1] > maxs[1]) maxs[1] = vert[1];
+                               if(vert[2] > maxs[2]) maxs[2] = vert[2];
+                       }
+               }
+       }
+       else
+       {
+               *collisionstride = 0;
+               *collisionbbox6f = NULL;
+       }
+}
+
+typedef struct patchtess_s
+{
+       patchinfo_t info;
+
+       // Auxiliary data used only by patch loading code in Mod_Q3BSP_LoadFaces
+       int surface_id;
+       float lodgroup[6];
+       float *originalvertex3f;
+} patchtess_t;
+
+#define PATCHTESS_SAME_LODGROUP(a,b) \
+       ( \
+               (a).lodgroup[0] == (b).lodgroup[0] && \
+               (a).lodgroup[1] == (b).lodgroup[1] && \
+               (a).lodgroup[2] == (b).lodgroup[2] && \
+               (a).lodgroup[3] == (b).lodgroup[3] && \
+               (a).lodgroup[4] == (b).lodgroup[4] && \
+               (a).lodgroup[5] == (b).lodgroup[5] \
+       )
+
 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;
+       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;
        float lightmaptcbase[2], lightmaptcscale[2];
        //int *originalelement3i;
        //int *originalneighbor3i;
@@ -4609,6 +4784,9 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
        float *originaltexcoordtexture2f;
        float *originaltexcoordlightmap2f;
        float *v;
+       patchtess_t *patchtess = NULL;
+       int patchtesscount = 0;
+       qboolean again;
 
        in = (q3dface_t *)(mod_base + l->fileofs);
        if (l->filelen % sizeof(*in))
@@ -4619,6 +4797,9 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
        loadmodel->data_surfaces = out;
        loadmodel->num_surfaces = count;
 
+       if(count > 0)
+               patchtess = (patchtess_t*) Mem_Alloc(tempmempool, count * sizeof(*patchtess));
+
        i = 0;
        oldi = i;
        oldin = in;
@@ -4666,7 +4847,8 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                                n = -1;
                        else if (n >= loadmodel->brushq3.num_originallightmaps)
                        {
-                               Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid lightmapindex %i (%i lightmaps)\n", i, out->texture->name, n, loadmodel->brushq3.num_originallightmaps);
+                               if(loadmodel->brushq3.num_originallightmaps != 0)
+                                       Con_Printf("Mod_Q3BSP_LoadFaces: face #%i (texture \"%s\"): invalid lightmapindex %i (%i lightmaps)\n", i, out->texture->name, n, loadmodel->brushq3.num_originallightmaps);
                                n = -1;
                        }
                        else
@@ -4711,6 +4893,7 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                                continue;
                        }
                        originalvertex3f = loadmodel->brushq3.data_vertex3f + firstvertex * 3;
+
                        // convert patch to Q3FACETYPE_MESH
                        xtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
                        ytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
@@ -4718,20 +4901,37 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                        xtess = bound(r_subdivisions_mintess.integer, xtess, r_subdivisions_maxtess.integer);
                        ytess = bound(r_subdivisions_mintess.integer, ytess, r_subdivisions_maxtess.integer);
                        // bound to sanity settings
-                       xtess = bound(1, xtess, 1024);
-                       ytess = bound(1, ytess, 1024);
-                       // bound to user limit on vertices
-                       while ((xtess > 1 || ytess > 1) && (((patchsize[0] - 1) * xtess) + 1) * (((patchsize[1] - 1) * ytess) + 1) > min(r_subdivisions_maxvertices.integer, 262144))
-                       {
-                               if (xtess > ytess)
-                                       xtess--;
-                               else
-                                       ytess--;
-                       }
-                       finalwidth = ((patchsize[0] - 1) * xtess) + 1;
-                       finalheight = ((patchsize[1] - 1) * ytess) + 1;
-                       numvertices = finalwidth * finalheight;
-                       numtriangles = (finalwidth - 1) * (finalheight - 1) * 2;
+                       xtess = bound(0, xtess, 1024);
+                       ytess = bound(0, ytess, 1024);
+
+                       // lower quality collision patches! Same procedure as before, but different cvars
+                       // convert patch to Q3FACETYPE_MESH
+                       cxtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_collision_tolerance.value);
+                       cytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_collision_tolerance.value);
+                       // bound to user settings
+                       cxtess = bound(r_subdivisions_collision_mintess.integer, cxtess, r_subdivisions_collision_maxtess.integer);
+                       cytess = bound(r_subdivisions_collision_mintess.integer, cytess, r_subdivisions_collision_maxtess.integer);
+                       // bound to sanity settings
+                       cxtess = bound(0, cxtess, 1024);
+                       cytess = bound(0, cytess, 1024);
+
+                       // store it for the LOD grouping step
+                       patchtess[patchtesscount].info.xsize = patchsize[0];
+                       patchtess[patchtesscount].info.ysize = patchsize[1];
+                       patchtess[patchtesscount].info.lods[PATCH_LOD_VISUAL].xtess = xtess;
+                       patchtess[patchtesscount].info.lods[PATCH_LOD_VISUAL].ytess = ytess;
+                       patchtess[patchtesscount].info.lods[PATCH_LOD_COLLISION].xtess = cxtess;
+                       patchtess[patchtesscount].info.lods[PATCH_LOD_COLLISION].ytess = cytess;
+       
+                       patchtess[patchtesscount].surface_id = i;
+                       patchtess[patchtesscount].lodgroup[0] = in->specific.patch.mins[0];
+                       patchtess[patchtesscount].lodgroup[1] = in->specific.patch.mins[1];
+                       patchtess[patchtesscount].lodgroup[2] = in->specific.patch.mins[2];
+                       patchtess[patchtesscount].lodgroup[3] = in->specific.patch.maxs[0];
+                       patchtess[patchtesscount].lodgroup[4] = in->specific.patch.maxs[1];
+                       patchtess[patchtesscount].lodgroup[5] = in->specific.patch.maxs[2];
+                       patchtess[patchtesscount].originalvertex3f = originalvertex3f;
+                       ++patchtesscount;
                        break;
                case Q3FACETYPE_FLARE:
                        if (developer.integer >= 100)
@@ -4745,6 +4945,38 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                meshtriangles += out->num_triangles;
        }
 
+       // Fix patches tesselations so that they make no seams
+       do
+       {
+               again = false;
+               for(i = 0; i < patchtesscount; ++i)
+               {
+                       for(j = i+1; j < patchtesscount; ++j)
+                       {
+                               if (!PATCHTESS_SAME_LODGROUP(patchtess[i], patchtess[j]))
+                                       continue;
+
+                               if (Q3PatchAdjustTesselation(3, &patchtess[i].info, patchtess[i].originalvertex3f, &patchtess[j].info, patchtess[j].originalvertex3f) )
+                                       again = true;
+                       }
+               }
+       }
+       while (again);
+
+       // Calculate resulting number of triangles
+       for(i = 0; i < patchtesscount; ++i)
+       {
+               finalwidth = Q3PatchDimForTess(patchtess[i].info.xsize, patchtess[i].info.lods[PATCH_LOD_VISUAL].xtess);
+               finalheight = Q3PatchDimForTess(patchtess[i].info.ysize,patchtess[i].info.lods[PATCH_LOD_VISUAL].ytess);
+               numvertices = finalwidth * finalheight;
+               numtriangles = (finalwidth - 1) * (finalheight - 1) * 2;
+
+               oldout[patchtess[i].surface_id].num_vertices = numvertices;
+               oldout[patchtess[i].surface_id].num_triangles = numtriangles;
+               meshvertices += oldout[patchtess[i].surface_id].num_vertices;
+               meshtriangles += oldout[patchtess[i].surface_id].num_triangles;
+       }
+
        i = oldi;
        in = oldin;
        out = oldout;
@@ -4794,25 +5026,25 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                        originaltexcoordtexture2f = loadmodel->brushq3.data_texcoordtexture2f + firstvertex * 2;
                        originaltexcoordlightmap2f = loadmodel->brushq3.data_texcoordlightmap2f + firstvertex * 2;
                        originalcolor4f = loadmodel->brushq3.data_color4f + firstvertex * 4;
-                       // convert patch to Q3FACETYPE_MESH
-                       xtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
-                       ytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_tolerance.value);
-                       // bound to user settings
-                       xtess = bound(r_subdivisions_mintess.integer, xtess, r_subdivisions_maxtess.integer);
-                       ytess = bound(r_subdivisions_mintess.integer, ytess, r_subdivisions_maxtess.integer);
-                       // bound to sanity settings
-                       xtess = bound(1, xtess, 1024);
-                       ytess = bound(1, ytess, 1024);
-                       // bound to user limit on vertices
-                       while ((xtess > 1 || ytess > 1) && (((patchsize[0] - 1) * xtess) + 1) * (((patchsize[1] - 1) * ytess) + 1) > min(r_subdivisions_maxvertices.integer, 262144))
+
+                       xtess = ytess = cxtess = cytess = -1;
+                       for(j = 0; j < patchtesscount; ++j)
+                               if(patchtess[j].surface_id == i)
+                               {
+                                       xtess = patchtess[j].info.lods[PATCH_LOD_VISUAL].xtess;
+                                       ytess = patchtess[j].info.lods[PATCH_LOD_VISUAL].ytess;
+                                       cxtess = patchtess[j].info.lods[PATCH_LOD_COLLISION].xtess;
+                                       cytess = patchtess[j].info.lods[PATCH_LOD_COLLISION].ytess;
+                                       break;
+                               }
+                       if(xtess == -1)
                        {
-                               if (xtess > ytess)
-                                       xtess--;
-                               else
-                                       ytess--;
+                               Con_Printf("ERROR: patch %d isn't preprocessed?!?\n", i);
+                               xtess = ytess = cxtess = cytess = 0;
                        }
-                       finalwidth = ((patchsize[0] - 1) * xtess) + 1;
-                       finalheight = ((patchsize[1] - 1) * ytess) + 1;
+
+                       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;
                        type = Q3FACETYPE_MESH;
@@ -4824,7 +5056,9 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                        Q3PatchTesselateFloat(2, sizeof(float[2]), (loadmodel->surfmesh.data_texcoordlightmap2f + 2 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[2]), originaltexcoordlightmap2f, xtess, ytess);
                        Q3PatchTesselateFloat(4, sizeof(float[4]), (loadmodel->surfmesh.data_lightmapcolor4f + 4 * out->num_firstvertex), patchsize[0], patchsize[1], sizeof(float[4]), originalcolor4f, xtess, ytess);
                        Q3PatchTriangleElements((loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle), finalwidth, finalheight, out->num_firstvertex);
+
                        out->num_triangles = Mod_RemoveDegenerateTriangles(out->num_triangles, (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle), (loadmodel->surfmesh.data_element3i + 3 * out->num_firsttriangle), loadmodel->surfmesh.data_vertex3f);
+
                        if (developer.integer >= 100)
                        {
                                if (out->num_triangles < finaltriangles)
@@ -4834,24 +5068,8 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                        }
                        // q3map does not put in collision brushes for curves... ugh
                        // build the lower quality collision geometry
-                       xtess = Q3PatchTesselationOnX(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_collision_tolerance.value);
-                       ytess = Q3PatchTesselationOnY(patchsize[0], patchsize[1], 3, originalvertex3f, r_subdivisions_collision_tolerance.value);
-                       // bound to user settings
-                       xtess = bound(r_subdivisions_collision_mintess.integer, xtess, r_subdivisions_collision_maxtess.integer);
-                       ytess = bound(r_subdivisions_collision_mintess.integer, ytess, r_subdivisions_collision_maxtess.integer);
-                       // bound to sanity settings
-                       xtess = bound(1, xtess, 1024);
-                       ytess = bound(1, ytess, 1024);
-                       // bound to user limit on vertices
-                       while ((xtess > 1 || ytess > 1) && (((patchsize[0] - 1) * xtess) + 1) * (((patchsize[1] - 1) * ytess) + 1) > min(r_subdivisions_collision_maxvertices.integer, 262144))
-                       {
-                               if (xtess > ytess)
-                                       xtess--;
-                               else
-                                       ytess--;
-                       }
-                       finalwidth = ((patchsize[0] - 1) * xtess) + 1;
-                       finalheight = ((patchsize[1] - 1) * ytess) + 1;
+                       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;
 
@@ -4859,7 +5077,7 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                        out->data_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, xtess, ytess);
+                       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);
 
                        //Mod_SnapVertices(3, out->num_vertices, (loadmodel->surfmesh.data_vertex3f + 3 * out->num_firstvertex), 0.25);
@@ -4868,6 +5086,11 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                        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);
+
+                       // 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);
+
                        if (developer.integer >= 100)
                                Con_Printf("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);
                        break;
@@ -4898,9 +5121,9 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                        if (cls.state != ca_dedicated && out->lightmaptexture)
                        {
                                // figure out which part of the merged lightmap this fits into
-                               int lightmapindex = LittleLong(in->lightmapindex) >> loadmodel->brushq3.deluxemapping;
-                               int mergewidth = R_TextureWidth(out->lightmaptexture) / 128;
-                               int mergeheight = R_TextureHeight(out->lightmaptexture) / 128;
+                               int lightmapindex = LittleLong(in->lightmapindex) >> (loadmodel->brushq3.deluxemapping ? 1 : 0);
+                               int mergewidth = R_TextureWidth(out->lightmaptexture) / loadmodel->brushq3.lightmapsize;
+                               int mergeheight = R_TextureHeight(out->lightmaptexture) / loadmodel->brushq3.lightmapsize;
                                lightmapindex &= mergewidth * mergeheight - 1;
                                lightmaptcscale[0] = 1.0f / mergewidth;
                                lightmaptcscale[1] = 1.0f / mergeheight;
@@ -4938,6 +5161,18 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
                //out->lightmapinfo->styles[3] = 255;
        }
 
+       i = oldi;
+       out = oldout;
+       for (;i < count;i++, out++)
+       {
+               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);
+       }
+
        // 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);
 
@@ -4960,6 +5195,9 @@ static void Mod_Q3BSP_LoadFaces(lump_t *l)
        if (loadmodel->brushq3.data_element3i)
                Mem_Free(loadmodel->brushq3.data_element3i);
        loadmodel->brushq3.data_element3i = NULL;
+
+       if(patchtess)
+               Mem_Free(patchtess);
 }
 
 static void Mod_Q3BSP_LoadModels(lump_t *l)
@@ -5169,7 +5407,7 @@ static void Mod_Q3BSP_LoadLightGrid(lump_t *l)
        if (l->filelen)
        {
                if (l->filelen < count * (int)sizeof(*in))
-                       Host_Error("Mod_Q3BSP_LoadLightGrid: invalid lightgrid lump size %i bytes, should be %i bytes (%ix%ix%i)", l->filelen, (int)(count * sizeof(*in)), loadmodel->brushq3.num_lightgrid_dimensions[0], loadmodel->brushq3.num_lightgrid_dimensions[1], loadmodel->brushq3.num_lightgrid_dimensions[2]);
+                       Host_Error("Mod_Q3BSP_LoadLightGrid: invalid lightgrid lump size %i bytes, should be %i bytes (%ix%ix%i)", l->filelen, (int)(count * sizeof(*in)), loadmodel->brushq3.num_lightgrid_isize[0], loadmodel->brushq3.num_lightgrid_isize[1], loadmodel->brushq3.num_lightgrid_isize[2]);
                if (l->filelen != count * (int)sizeof(*in))
                        Con_Printf("Mod_Q3BSP_LoadLightGrid: Warning: calculated lightgrid size %i bytes does not match lump size %i\n", (int)(count * sizeof(*in)), l->filelen);
                out = (q3dlightgrid_t *)Mem_Alloc(loadmodel->mempool, count * sizeof(*out));
@@ -5386,7 +5624,7 @@ static void Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace_t *trace, dp_model_t *mod
                        if (surface->num_collisiontriangles && surface->collisionmarkframe != 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->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
+                               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);
                        }
                }
        }
@@ -5467,7 +5705,7 @@ static void Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace_t *trace, dp_model_t *mo
                        if (surface->num_collisiontriangles && surface->collisionmarkframe != 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->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
+                               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);
                        }
                }
        }
@@ -5476,6 +5714,7 @@ static void Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace_t *trace, dp_model_t *mo
 static void Mod_Q3BSP_TraceBox(dp_model_t *model, int frame, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask)
 {
        int i;
+       vec3_t shiftstart, shiftend;
        float segmentmins[3], segmentmaxs[3];
        static int markframe = 0;
        msurface_t *surface;
@@ -5484,41 +5723,43 @@ static void Mod_Q3BSP_TraceBox(dp_model_t *model, int frame, trace_t *trace, con
        trace->fraction = 1;
        trace->realfraction = 1;
        trace->hitsupercontentsmask = hitsupercontentsmask;
-       if (mod_q3bsp_optimizedtraceline.integer && VectorLength2(boxmins) + VectorLength2(boxmaxs) == 0)
+       if (mod_q3bsp_optimizedtraceline.integer && VectorCompare(boxmins, boxmaxs))
        {
-               if (VectorCompare(start, end))
+               VectorAdd(start, boxmins, shiftstart);
+               VectorAdd(end, boxmins, shiftend);
+               if (VectorCompare(shiftstart, shiftend))
                {
                        // point trace
                        if (model->brush.submodel)
                        {
                                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
                                        if (brush->colbrushf)
-                                               Collision_TracePointBrushFloat(trace, start, brush->colbrushf);
+                                               Collision_TracePointBrushFloat(trace, shiftstart, brush->colbrushf);
                        }
                        else
-                               Mod_Q3BSP_TracePoint_RecursiveBSPNode(trace, model, model->brush.data_nodes, start, ++markframe);
+                               Mod_Q3BSP_TracePoint_RecursiveBSPNode(trace, model, model->brush.data_nodes, shiftstart, ++markframe);
                }
                else
                {
                        // line trace
-                       segmentmins[0] = min(start[0], end[0]) - 1;
-                       segmentmins[1] = min(start[1], end[1]) - 1;
-                       segmentmins[2] = min(start[2], end[2]) - 1;
-                       segmentmaxs[0] = max(start[0], end[0]) + 1;
-                       segmentmaxs[1] = max(start[1], end[1]) + 1;
-                       segmentmaxs[2] = max(start[2], end[2]) + 1;
+                       segmentmins[0] = min(shiftstart[0], shiftend[0]) - 1;
+                       segmentmins[1] = min(shiftstart[1], shiftend[1]) - 1;
+                       segmentmins[2] = min(shiftstart[2], shiftend[2]) - 1;
+                       segmentmaxs[0] = max(shiftstart[0], shiftend[0]) + 1;
+                       segmentmaxs[1] = max(shiftstart[1], shiftend[1]) + 1;
+                       segmentmaxs[2] = max(shiftstart[2], shiftend[2]) + 1;
                        if (model->brush.submodel)
                        {
                                for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
                                        if (brush->colbrushf)
-                                               Collision_TraceLineBrushFloat(trace, start, end, brush->colbrushf, brush->colbrushf);
+                                               Collision_TraceLineBrushFloat(trace, shiftstart, shiftend, 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->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
+                                                       Collision_TraceLineTriangleMeshFloat(trace, shiftstart, shiftend, 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);
                        }
                        else
-                               Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, model->brush.data_nodes, start, end, 0, 1, start, end, ++markframe, segmentmins, segmentmaxs);
+                               Mod_Q3BSP_TraceLine_RecursiveBSPNode(trace, model, model->brush.data_nodes, shiftstart, shiftend, 0, 1, shiftstart, shiftend, ++markframe, segmentmins, segmentmaxs);
                }
        }
        else
@@ -5546,7 +5787,7 @@ static void Mod_Q3BSP_TraceBox(dp_model_t *model, int frame, trace_t *trace, con
                        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, thisbrush_end, surface->num_collisiontriangles, surface->data_collisionelement3i, surface->data_collisionvertex3f, surface->texture->supercontents, surface->texture->surfaceflags, surface->texture, segmentmins, segmentmaxs);
+                                               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);
                }
                else
                        Mod_Q3BSP_TraceBrush_RecursiveBSPNode(trace, model, model->brush.data_nodes, thisbrush_start, thisbrush_end, ++markframe, segmentmins, segmentmaxs);
@@ -5608,6 +5849,10 @@ static int Mod_Q3BSP_SuperContentsFromNativeContents(dp_model_t *model, int nati
                supercontents |= SUPERCONTENTS_MONSTERCLIP;
        if (nativecontents & CONTENTSQ3_DONOTENTER)
                supercontents |= SUPERCONTENTS_DONOTENTER;
+       if (nativecontents & CONTENTSQ3_BOTCLIP)
+               supercontents |= SUPERCONTENTS_BOTCLIP;
+       if (!(nativecontents & CONTENTSQ3_TRANSLUCENT))
+               supercontents |= SUPERCONTENTS_OPAQUE;
        return supercontents;
 }
 
@@ -5634,6 +5879,10 @@ static int Mod_Q3BSP_NativeContentsFromSuperContents(dp_model_t *model, int supe
                nativecontents |= CONTENTSQ3_MONSTERCLIP;
        if (supercontents & SUPERCONTENTS_DONOTENTER)
                nativecontents |= CONTENTSQ3_DONOTENTER;
+       if (supercontents & SUPERCONTENTS_BOTCLIP)
+               nativecontents |= CONTENTSQ3_BOTCLIP;
+       if (!(supercontents & SUPERCONTENTS_OPAQUE))
+               nativecontents |= CONTENTSQ3_TRANSLUCENT;
        return nativecontents;
 }
 
@@ -5652,7 +5901,7 @@ void Mod_Q3BSP_RecursiveFindNumLeafs(mnode_t *node)
 
 void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
-       int i, j, numshadowmeshtriangles;
+       int i, j, numshadowmeshtriangles, lumps;
        q3dheader_t *header;
        float corner[3], yawradius, modelradius;
        msurface_t *surface;
@@ -5664,13 +5913,12 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        mod->numskins = 1;
 
        header = (q3dheader_t *)buffer;
+       if((char *) bufferend < (char *) buffer + sizeof(q3dheader_t))
+               Host_Error("Mod_Q3BSP_Load: %s is smaller than its header", mod->name);
 
        i = LittleLong(header->version);
-       if (i != Q3BSPVERSION && i != Q3BSPVERSION_IG)
+       if (i != Q3BSPVERSION && i != Q3BSPVERSION_IG && i != Q3BSPVERSION_LIVE)
                Host_Error("Mod_Q3BSP_Load: %s has wrong version number (%i, should be %i)", mod->name, i, Q3BSPVERSION);
-       mod->brush.ishlbsp = false;
-       if (loadmodel->isworldmodel)
-               Cvar_SetValue("halflifebsp", mod->brush.ishlbsp);
 
        mod->soundfromcenter = true;
        mod->TraceBox = Mod_Q3BSP_TraceBox;
@@ -5686,30 +5934,49 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
        mod->brush.FindBoxClusters = Mod_Q1BSP_FindBoxClusters;
        mod->brush.LightPoint = Mod_Q3BSP_LightPoint;
        mod->brush.FindNonSolidLocation = Mod_Q1BSP_FindNonSolidLocation;
+       mod->brush.AmbientSoundLevelsForPoint = NULL;
+       mod->brush.RoundUpToHullSize = NULL;
        mod->brush.PointInLeaf = Mod_Q1BSP_PointInLeaf;
        mod->Draw = R_Q1BSP_Draw;
        mod->DrawDepth = R_Q1BSP_DrawDepth;
        mod->DrawDebug = R_Q1BSP_DrawDebug;
        mod->GetLightInfo = R_Q1BSP_GetLightInfo;
+       mod->DrawShadowMap = R_Q1BSP_DrawShadowMap;
        mod->CompileShadowVolume = R_Q1BSP_CompileShadowVolume;
        mod->DrawShadowVolume = R_Q1BSP_DrawShadowVolume;
        mod->DrawLight = R_Q1BSP_DrawLight;
-       mod->DrawAddWaterPlanes = NULL;
 
        mod_base = (unsigned char *)header;
 
        // swap all the lumps
        header->ident = LittleLong(header->ident);
        header->version = LittleLong(header->version);
-       for (i = 0;i < Q3HEADER_LUMPS;i++)
+       lumps = (header->version == Q3BSPVERSION_LIVE) ? Q3HEADER_LUMPS_LIVE : Q3HEADER_LUMPS;
+       for (i = 0;i < lumps;i++)
        {
-               header->lumps[i].fileofs = LittleLong(header->lumps[i].fileofs);
-               header->lumps[i].filelen = LittleLong(header->lumps[i].filelen);
+               j = (header->lumps[i].fileofs = LittleLong(header->lumps[i].fileofs));
+               if((char *) bufferend < (char *) buffer + j)
+                       Host_Error("Mod_Q3BSP_Load: %s has a lump that starts outside the file!", mod->name);
+               j += (header->lumps[i].filelen = LittleLong(header->lumps[i].filelen));
+               if((char *) bufferend < (char *) buffer + j)
+                       Host_Error("Mod_Q3BSP_Load: %s has a lump that ends outside the file!", mod->name);
+       }
+       /*
+        * NO, do NOT clear them!
+        * they contain actual data referenced by other stuff.
+        * Instead, before using the advertisements lump, check header->versio
+        * again!
+        * Sorry, but otherwise it breaks memory of the first lump.
+       for (i = lumps;i < Q3HEADER_LUMPS_MAX;i++)
+       {
+               header->lumps[i].fileofs = 0;
+               header->lumps[i].filelen = 0;
        }
+       */
 
        mod->brush.qw_md4sum = 0;
        mod->brush.qw_md4sum2 = 0;
-       for (i = 0;i < Q3HEADER_LUMPS;i++)
+       for (i = 0;i < lumps;i++)
        {
                if (i == Q3LUMP_ENTITIES)
                        continue;
@@ -5717,6 +5984,9 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                if (i == Q3LUMP_PVS || i == Q3LUMP_LEAFS || i == Q3LUMP_NODES)
                        continue;
                mod->brush.qw_md4sum2 ^= Com_BlockChecksum(mod_base + header->lumps[i].fileofs, header->lumps[i].filelen);
+
+               // all this checksumming can take a while, so let's send keepalives here too
+               CL_KeepaliveMessage(false);
        }
 
        Mod_Q3BSP_LoadEntities(&header->lumps[Q3LUMP_ENTITIES]);
@@ -5749,17 +6019,20 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 
        // 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++)
+       if (cls.state != ca_dedicated)
        {
-               surface->num_firstshadowmeshtriangle = numshadowmeshtriangles;
-               numshadowmeshtriangles += surface->num_triangles;
+               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);
        }
-       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);
 
        loadmodel->brush.num_leafs = 0;
        Mod_Q3BSP_RecursiveFindNumLeafs(loadmodel->brush.data_nodes);
@@ -5770,16 +6043,14 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                if (i > 0)
                {
                        char name[10];
-                       // LordHavoc: only register submodels if it is the world
-                       // (prevents external bsp models from replacing world submodels with
-                       //  their own)
-                       if (!loadmodel->isworldmodel)
-                               continue;
                        // duplicate the basic information
                        dpsnprintf(name, sizeof(name), "*%i", i);
-                       mod = Mod_FindName(name);
+                       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;
@@ -5791,7 +6062,7 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                        mod->brush.BoxTouchingVisibleLeafs = NULL;
                        mod->brush.FindBoxClusters = NULL;
                        mod->brush.LightPoint = NULL;
-                       mod->brush.FindNonSolidLocation = Mod_Q1BSP_FindNonSolidLocation;
+                       mod->brush.AmbientSoundLevelsForPoint = NULL;
                }
                mod->brush.submodel = i;
 
@@ -5800,9 +6071,8 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                mod->nummodelsurfaces = mod->brushq3.data_models[i].numfaces;
                mod->firstmodelbrush = mod->brushq3.data_models[i].firstbrush;
                mod->nummodelbrushes = mod->brushq3.data_models[i].numbrushes;
-               mod->surfacelist = (int *)Mem_Alloc(loadmodel->mempool, mod->nummodelsurfaces * sizeof(*mod->surfacelist));
-               for (j = 0;j < mod->nummodelsurfaces;j++)
-                       mod->surfacelist[j] = mod->firstmodelsurface + j;
+               mod->sortedmodelsurfaces = (int *)Mem_Alloc(loadmodel->mempool, mod->nummodelsurfaces * sizeof(*mod->sortedmodelsurfaces));
+               Mod_MakeSortedSurfaces(mod);
 
                VectorCopy(mod->brushq3.data_models[i].mins, mod->normalmins);
                VectorCopy(mod->brushq3.data_models[i].maxs, mod->normalmaxs);
@@ -5844,28 +6114,28 @@ void Mod_Q3BSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
                mod->radius = modelradius;
                mod->radius2 = modelradius * modelradius;
 
+               // this gets altered below if sky or water is used
+               mod->DrawSky = NULL;
+               mod->DrawAddWaterPlanes = NULL;
+
                for (j = 0;j < mod->nummodelsurfaces;j++)
                        if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & MATERIALFLAG_SKY)
                                break;
                if (j < mod->nummodelsurfaces)
                        mod->DrawSky = R_Q1BSP_DrawSky;
-               else
-                       mod->DrawSky = NULL;
 
                for (j = 0;j < mod->nummodelsurfaces;j++)
                        if (mod->data_surfaces[j + mod->firstmodelsurface].texture->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION))
                                break;
                if (j < mod->nummodelsurfaces)
                        mod->DrawAddWaterPlanes = R_Q1BSP_DrawAddWaterPlanes;
-               else
-                       mod->DrawAddWaterPlanes = NULL;
        }
 }
 
 void Mod_IBSP_Load(dp_model_t *mod, void *buffer, void *bufferend)
 {
        int i = LittleLong(((int *)buffer)[1]);
-       if (i == Q3BSPVERSION || i == Q3BSPVERSION_IG)
+       if (i == Q3BSPVERSION || i == Q3BSPVERSION_IG || i == Q3BSPVERSION_LIVE)
                Mod_Q3BSP_Load(mod,buffer, bufferend);
        else if (i == Q2BSPVERSION)
                Mod_Q2BSP_Load(mod,buffer, bufferend);