diff --git a/source/level/layercollision.cpp b/source/level/layercollision.cpp
index b9d75d663..23e21e4ad 100644
--- a/source/level/layercollision.cpp
+++ b/source/level/layercollision.cpp
@@ -48,6 +48,7 @@ void CLayerCollision::render(DVECTOR &MapPos)
 		int		xoff,yoff;
 		u8		*coll;
 		POLY_F4	*f4;
+		POLY_F3	*f3;
 
 		xoff=MapPos.vx&15;
 		yoff=MapPos.vy&15;
@@ -58,13 +59,89 @@ void CLayerCollision::render(DVECTOR &MapPos)
 			coll=&Map[mapx+(mapy*MapWidth)];
 			for(x=-xoff;x<(33*16)-xoff;x+=16)
 			{
-				if(*coll)
+				switch(*coll)
 				{
-					f4=GetPrimF4();
-					setXYWH(f4,x,y,16,16);
-					setRGB0(f4,0,0,90);
-					setSemiTrans(f4,true);
-					AddPrimToList(f4,0);
+					case 0:
+						break;
+
+					case 1:
+					case 2:
+						f4=GetPrimF4();
+						setXYWH(f4,x,y,16,16);
+						setRGB0(f4,0,0,90);
+						setSemiTrans(f4,true);
+						AddPrimToList(f4,0);
+						break;
+
+					case 5:
+						f3=GetPrimF3();
+						setXY3(f3,x+16,y+16,
+								  x,y+16,
+								  x+16,y+8);
+						setRGB0(f3,0,0,90);
+						setSemiTrans(f3,true);
+						AddPrimToList(f3,0);
+						break;
+
+					case 6:
+						f3=GetPrimF3();
+						setXY3(f3,x,y+16,
+								  x+16,y+16,
+								  x,y+8);
+						setRGB0(f3,0,0,90);
+						setSemiTrans(f3,true);
+						AddPrimToList(f3,0);
+						break;
+
+					case 9:
+						f4=GetPrimF4();
+						setXY4(f4,x+16,y,
+								  x,y+8,
+								  x+16,y+16,
+								  x,y+16);
+						setRGB0(f4,0,0,90);
+						setSemiTrans(f4,true);
+						AddPrimToList(f4,0);
+						break;
+
+					case 10:
+						f4=GetPrimF4();
+						setXY4(f4,x,y,
+								  x+16,y+8,
+								  x,y+16,
+								  x+16,y+16);
+						setRGB0(f4,0,0,90);
+						setSemiTrans(f4,true);
+						AddPrimToList(f4,0);
+						break;
+
+					case 13:
+						f3=GetPrimF3();
+						setXY3(f3,x+16,y+16,
+								  x,y+16,
+								  x+16,y);
+						setRGB0(f3,0,0,90);
+						setSemiTrans(f3,true);
+						AddPrimToList(f3,0);
+						break;
+
+					case 14:
+						f3=GetPrimF3();
+						setXY3(f3,x,y+16,
+								  x+16,y+16,
+								  x,y);
+						setRGB0(f3,0,0,90);
+						setSemiTrans(f3,true);
+						AddPrimToList(f3,0);
+						break;
+
+					default:
+						f4=GetPrimF4();
+						setXYWH(f4,x,y,16,16);
+						setRGB0(f4,200,0,0);
+						setSemiTrans(f4,true);
+						AddPrimToList(f4,0);
+						break;
 				}
 				coll++;
 			}