diff --git a/polymer/eduke32/build/include/build.h b/polymer/eduke32/build/include/build.h
index 4be171c8d..9cdc6a835 100644
--- a/polymer/eduke32/build/include/build.h
+++ b/polymer/eduke32/build/include/build.h
@@ -1285,7 +1285,7 @@ void hicsetpalettetint(int32_t palnum, char r, char g, char b, char effect);
 // flags bitset: 1 = don't compress
 int32_t hicsetsubsttex(int32_t picnum, int32_t palnum, const char *filen, float alphacut,
                        float xscale, float yscale, float specpower, float specfactor, char flags);
-int32_t hicsetskybox(int32_t picnum, int32_t palnum, char *faces[6]);
+int32_t hicsetskybox(int32_t picnum, int32_t palnum, char *faces[6], int32_t flags);
 int32_t hicclearsubst(int32_t picnum, int32_t palnum);
 
 int32_t Ptile2tile(int32_t tile, int32_t pallet) ATTRIBUTE((pure));
diff --git a/polymer/eduke32/build/src/defs.c b/polymer/eduke32/build/src/defs.c
index 077ce98bb..c5d212815 100644
--- a/polymer/eduke32/build/src/defs.c
+++ b/polymer/eduke32/build/src/defs.c
@@ -366,7 +366,7 @@ static int32_t defsparser(scriptfile *script)
             }
             if (i < 6 || !happy) break;
 #ifdef USE_OPENGL
-            hicsetskybox(tile,pal,fn);
+            hicsetskybox(tile,pal,fn, 0);
 #endif
         }
         break;
@@ -1186,6 +1186,7 @@ static int32_t defsparser(scriptfile *script)
                         { "detailscale",   T_PARAM      },
                         { "specpower",     T_SPECPOWER  }, { "specularpower",  T_SPECPOWER  }, { "parallaxscale", T_SPECPOWER },
                         { "specfactor",    T_SPECFACTOR }, { "specularfactor", T_SPECFACTOR }, { "parallaxbias", T_SPECFACTOR },
+
                     };
 
                     if (scriptfile_getbraces(script,&skinend)) break;
@@ -1490,7 +1491,7 @@ static int32_t defsparser(scriptfile *script)
             char *skyboxtokptr = script->ltextptr;
             char *fn[6] = {0,0,0,0,0,0};
             char *modelend;
-            int32_t i, tile = -1, pal = 0, happy = 1;
+            int32_t i, tile = -1, pal = 0, happy = 1, flags = 0;
 
             static const tokenlist skyboxtokens[] =
             {
@@ -1501,7 +1502,9 @@ static int32_t defsparser(scriptfile *script)
                 { "bk"     ,T_BACK   },{ "back"   ,T_BACK   },
                 { "lf"     ,T_LEFT   },{ "left"   ,T_LEFT   },{ "lt"     ,T_LEFT   },
                 { "up"     ,T_TOP    },{ "top"    ,T_TOP    },{ "ceiling",T_TOP    },{ "ceil"   ,T_TOP    },
-                { "dn"     ,T_BOTTOM },{ "bottom" ,T_BOTTOM },{ "floor"  ,T_BOTTOM },{ "down"   ,T_BOTTOM }
+                { "dn"     ,T_BOTTOM },{ "bottom" ,T_BOTTOM },{ "floor"  ,T_BOTTOM },{ "down"   ,T_BOTTOM },
+                { "nocompress", T_NOCOMPRESS },
+                { "nodownsize", T_NODOWNSIZE },
             };
 
             if (scriptfile_getbraces(script,&modelend)) break;
@@ -1526,6 +1529,12 @@ static int32_t defsparser(scriptfile *script)
                     scriptfile_getstring(script,&fn[4]); break;
                 case T_BOTTOM:
                     scriptfile_getstring(script,&fn[5]); break;
+#ifdef USE_OPENGL
+                case T_NOCOMPRESS:
+                    flags |= 1; break;
+                case T_NODOWNSIZE:
+                    flags |= 16; break;
+#endif
                 }
             }
 
@@ -1540,7 +1549,7 @@ static int32_t defsparser(scriptfile *script)
             if (!happy) break;
 
 #ifdef USE_OPENGL
-            hicsetskybox(tile,pal,fn);
+            hicsetskybox(tile,pal,fn, flags);
 #endif
         }
         break;
diff --git a/polymer/eduke32/build/src/hightile.c b/polymer/eduke32/build/src/hightile.c
index 209d8e76d..e60fb4d21 100644
--- a/polymer/eduke32/build/src/hightile.c
+++ b/polymer/eduke32/build/src/hightile.c
@@ -197,7 +197,7 @@ int32_t hicsetsubsttex(int32_t picnum, int32_t palnum, const char *filen, float
 // hicsetskybox(picnum,pal,faces[6])
 //   Specifies a graphic files making up a skybox.
 //
-int32_t hicsetskybox(int32_t picnum, int32_t palnum, char *faces[6])
+int32_t hicsetskybox( int32_t picnum, int32_t palnum, char *faces[6], int32_t flags )
 {
     hicreplctyp *hr, *hrn;
     int32_t j;
@@ -222,23 +222,18 @@ int32_t hicsetskybox(int32_t picnum, int32_t palnum, char *faces[6])
     else hrn = hr;
 
     if (!hrn->skybox)
-    {
         hrn->skybox = (struct hicskybox_t *)Xcalloc(1,sizeof(struct hicskybox_t));
-    }
     else
     {
-        for (j=5; j>=0; j--)
-        {
-            if (hrn->skybox->face[j])
-                Bfree(hrn->skybox->face[j]);
-        }
+        for (j=0; j<6; j++)
+            DO_FREE_AND_NULL(hrn->skybox->face[j]);
     }
 
     // store each face's filename
     for (j=0; j<6; j++)
-    {
         hrn->skybox->face[j] = Xstrdup(faces[j]);
-    }
+
+    hrn->flags = flags;
 
     if (hr == NULL)
     {
@@ -307,11 +302,12 @@ int32_t hicsetsubsttex(int32_t picnum, int32_t palnum, const char *filen, float
     UNREFERENCED_PARAMETER(alphacut);
     return 0;
 }
-int32_t hicsetskybox(int32_t picnum, int32_t palnum, char *faces[6])
+int32_t hicsetskybox(int32_t picnum, int32_t palnum, char *faces[6], int32_t flags)
 {
     UNREFERENCED_PARAMETER(picnum);
     UNREFERENCED_PARAMETER(palnum);
     UNREFERENCED_PARAMETER(faces);
+    UNREFERENCED_PARAMETER(flags);
     return 0;
 }
 int32_t hicclearsubst(int32_t picnum, int32_t palnum)