diff --git a/polymer/eduke32/build/include/build.h b/polymer/eduke32/build/include/build.h
index de37e9cde..f7e0ae5f7 100644
--- a/polymer/eduke32/build/include/build.h
+++ b/polymer/eduke32/build/include/build.h
@@ -148,7 +148,8 @@ typedef struct BPACK
 //   bit 7: 1 = Real centered centering, 0 = foot center             "C"
 //   bit 8: 1 = Blocking sprite (use with hitscan / cliptype 1)      "H"
 //   bit 9: 1 = Transluscence reversing, 0 = normal                  "T"
-//   bits 10-14: reserved
+//   bits 10-13: reserved
+//   bit 14: 1 = invisible but casts shadow
 //   bit 15: 1 = Invisible sprite, 0 = not invisible
 
     //44 bytes
diff --git a/polymer/eduke32/build/src/polymer.c b/polymer/eduke32/build/src/polymer.c
index 9c53767d5..d5e03bdde 100644
--- a/polymer/eduke32/build/src/polymer.c
+++ b/polymer/eduke32/build/src/polymer.c
@@ -952,8 +952,6 @@ void                polymer_drawsprite(int32_t snum)
 
     spriteplane.material.diffusemodulation[3] *=  (1.0f - spriteext[tspr->owner].alpha);
 
-    if (tspr->cstat & 16384) spriteplane.material.diffusemodulation[3] = 0.0f;
-
     if (((tspr->cstat>>4) & 3) == 0)
         xratio = (float)(tspr->xrepeat) * 0.20f; // 32 / 160
     else
@@ -2994,6 +2992,8 @@ static inline void  polymer_scansprites(int16_t sectnum, spritetype* localtsprit
                 (spr->xrepeat > 0) && (spr->yrepeat > 0) &&
                 (*localspritesortcnt < MAXSPRITESONSCREEN))
         {
+            if ((spr->cstat & 16384) && (!depth || mirrors[depth-1].plane))
+                continue;
             copybufbyte(spr,&localtsprite[*localspritesortcnt],sizeof(spritetype));
             localtsprite[(*localspritesortcnt)++].owner = i;
         }
@@ -3704,7 +3704,6 @@ static void         polymer_getbuildmaterial(_prmaterial* material, int16_t tile
         }
     }
 
-
     // PR_BIT_SPECULAR_MAP
     if (hicfindsubst(tilenum, SPECULARPAL, 0))
     {