- added UDMF_fields for sector plane reflectiveness.

src/namedef.h

@@ -575,6 +575,8 @@ xx(damageterraineffect)
 xx(damagehazard)
 xx(floorterrain)
 xx(ceilingterrain)
+xx(floor_reflect)
+xx(ceiling_reflect)
 
 // USDF keywords
 xx(Amount)

src/p_setup.cpp

@@ -4080,6 +4080,13 @@ void P_SetupLevel (const char *lumpname, int position)
 	// set up world state
 	P_SpawnSpecials ();
 
+	// disable reflective planes on sloped sectors.
+	for (auto i = 0; i < numsectors; i++)
+	{
+		if (sectors[i].floorplane.isSlope()) sectors[i].reflect[sector_t::floor] = 0;
+		if (sectors[i].ceilingplane.isSlope()) sectors[i].reflect[sector_t::ceiling] = 0;
+	}
+
 	// This must be done BEFORE the PolyObj Spawn!!!
 	Renderer->PreprocessLevel();
 

src/p_udmf.cpp

@@ -1563,6 +1563,14 @@ public:
 					sec->terrainnum[sector_t::ceiling] = P_FindTerrain(CheckString(key));
 					break;
 
+				case NAME_floor_reflect:
+					sec->reflect[sector_t::floor] = (float)CheckFloat(key);
+					break;
+
+				case NAME_ceiling_reflect:
+					sec->reflect[sector_t::ceiling] = (float)CheckFloat(key);
+					break;
+
 				case NAME_MoreIds:
 					// delay parsing of the tag string until parsing of the sector is complete
 					// This ensures that the ID is always the first tag in the list.