hooked up the per-level colormaps with the hardware renderer.

src/g_level.cpp

@@ -1822,11 +1822,8 @@ void FLevelLocals::Init()
 		}
 	}
 
-	if (strnicmp (info->CustomColorMap.GetChars(), "COLORMAP", 8) != 0)
-	{
-		flags3 |= LEVEL3_HAS_CUSTOM_COLORMAP;
-	}
 
+	globalcolormap = R_ColormapNumForName(info->CustomColorMap.GetChars());
 	airsupply = info->airsupply*TICRATE;
 	outsidefog = info->outsidefog;
 	WallVertLight = info->WallVertLight*2;

src/g_levellocals.h

@@ -642,6 +642,7 @@ public:
 	double		sky1pos, sky2pos;
 	float		hw_sky1pos, hw_sky2pos;
 	bool		skystretch;
+	uint32_t	globalcolormap;
 
 	int			total_secrets;
 	int			found_secrets;

src/gamedata/g_mapinfo.h

@@ -270,7 +270,6 @@ enum ELevelFlags : unsigned int
 	LEVEL3_AVOIDMELEE			= 0x00020000,	// global flag needed for proper MBF support.
 	LEVEL3_NOJUMPDOWN			= 0x00040000,	// only for MBF21. Inverse of MBF's dog_jumping flag.
 	LEVEL3_LIGHTCREATED			= 0x00080000,	// a light had been created in the last frame
-	LEVEL3_HAS_CUSTOM_COLORMAP  = 0x00100000,   // custom colormap property from dsda-doom
 };
 
 

src/gamedata/r_defs.h

@@ -693,7 +693,7 @@ struct sector_t
 	int			sky;						// MBF sky transfer info.
 	int 		validcount;					// if == validcount, already checked
 
-	uint32_t bottommap, midmap, topmap;		// killough 4/4/98: dynamic colormaps
+	uint32_t selfmap, bottommap, midmap, topmap;		// killough 4/4/98: dynamic colormaps
 											// [RH] these can also be blend values if
 											//		the alpha mask is non-zero
 

src/p_saveg.cpp

@@ -303,6 +303,7 @@ FSerializer &Serialize(FSerializer &arc, const char *key, sector_t &p, sector_t
 			//("bottommap", p.bottommap)
 			//("midmap", p.midmap)
 			//("topmap", p.topmap)
+			//("selfmap", p.selfmap) // todo: if this becomes changeable we need a colormap serializer.
 			("damageamount", p.damageamount, def->damageamount)
 			("damageinterval", p.damageinterval, def->damageinterval)
 			("leakydamage", p.leakydamage, def->leakydamage)

src/rendering/2d/v_blend.cpp

@@ -250,6 +250,8 @@ FVector4 V_CalcBlend(sector_t* viewsector, PalEntry* modulateColor)
 				auto s = viewsector->heightsec;
 				blendv = s->floorplane.PointOnSide(vpp) < 0 ? s->bottommap : s->ceilingplane.PointOnSide(vpp) < 0 ? s->topmap : s->midmap;
 			}
+			else if (viewsector->selfmap != 0) blendv = viewsector->selfmap;
+			else blendv = viewsector->Level->globalcolormap;
 		}
 		else
 		{

src/rendering/swrenderer/r_swrenderer.cpp

@@ -271,7 +271,7 @@ void FSoftwareRenderer::SetColormap(FLevelLocals *Level)
 	NormalLight.Maps = realcolormaps.Maps;
 	NormalLight.ChangeColor(PalEntry(255, 255, 255), 0);
 	NormalLight.ChangeFade(Level->fadeto);
-	if(Level->info->flags3 & LEVEL3_HAS_CUSTOM_COLORMAP)
+	if(Level->globalcolormap != 0) // this deliberately ignores the translated value and goes directly to the source.
 	{
 		SetDefaultColormap(Level->info->CustomColorMap.GetChars());
 	}