diff --git a/src/gamedata/r_defs.h b/src/gamedata/r_defs.h
index 8c551ba0c8..4987ee6fc5 100644
--- a/src/gamedata/r_defs.h
+++ b/src/gamedata/r_defs.h
@@ -1208,7 +1208,7 @@ struct side_t
 	uint32_t	LeftSide, RightSide;	// [RH] Group walls into loops
 	uint16_t	TexelLength;
 	int16_t		Light;
-	uint8_t		Flags;
+	uint16_t	Flags;
 	int			UDMFIndex;		// needed to access custom UDMF fields which are stored in loading order.
 	FLightNode * lighthead;		// all dynamic lights that may affect this wall
 	seg_t **segs;	// all segs belonging to this sidedef in ascending order. Used for precise rendering
diff --git a/src/gamedata/textures/texturemanager.cpp b/src/gamedata/textures/texturemanager.cpp
index 3f1225f401..589f787b39 100644
--- a/src/gamedata/textures/texturemanager.cpp
+++ b/src/gamedata/textures/texturemanager.cpp
@@ -692,12 +692,14 @@ void FTextureManager::AddHiresTextures (int wadnum)
 void FTextureManager::ParseColorization(FScanner& sc)
 {
 	TextureManipulation tm = {};
+	tm.ModulateColor = 0x01ffffff;
 	sc.MustGetString();
 	FName cname = sc.String;
 	sc.MustGetToken('{');
 	while (!sc.CheckToken('}'))
 	{
-		if (sc.Compare("desaturation"))
+		sc.MustGetString();
+		if (sc.Compare("DesaturationFactor"))
 		{
 			sc.MustGetFloat();
 			tm.DesaturationFactor = (float)sc.Float;
@@ -716,6 +718,7 @@ void FTextureManager::ParseColorization(FScanner& sc)
 				sc.MustGetNumber();
 				tm.ModulateColor.a = sc.Number;
 			}
+			else tm.ModulateColor.a = 1;
 		}
 		else if (sc.Compare("BlendColor"))
 		{
@@ -723,18 +726,20 @@ void FTextureManager::ParseColorization(FScanner& sc)
 			tm.BlendColor = V_GetColor(NULL, sc) & 0xffffff;
 			sc.MustGetToken(',');
 			sc.MustGetString();
-			static const char* opts[] = {"none", "alpha", "screen", "overlay", "hardlight", nullptr};
+			static const char* opts[] = { "none", "alpha", "screen", "overlay", "hardlight", nullptr };
 			tm.AddColor.a = (tm.AddColor.a & ~TextureManipulation::BlendMask) | sc.MustMatchString(opts);
-			if (sc.CheckToken(','))
+			if (sc.Compare("alpha"))
 			{
+				sc.MustGetToken(',');
 				sc.MustGetFloat();
-				tm.BlendColor.a = (uint8_t)clamp(sc.Float, 0., 1.) * 255;
+				tm.BlendColor.a = (uint8_t)(clamp(sc.Float, 0., 1.) * 255);
 			}
 		}
 		else if (sc.Compare("invert"))
 		{
 			tm.AddColor.a |= TextureManipulation::InvertBit;
 		}
+		else sc.ScriptError("Unknown token '%s'", sc.String);
 	}
 	if (tm.CheckIfEnabled())
 	{
diff --git a/src/rendering/hwrenderer/scene/hw_renderstate.h b/src/rendering/hwrenderer/scene/hw_renderstate.h
index d725d820d3..42092b2e1a 100644
--- a/src/rendering/hwrenderer/scene/hw_renderstate.h
+++ b/src/rendering/hwrenderer/scene/hw_renderstate.h
@@ -157,7 +157,7 @@ struct FVector4PalEntry
 		r = newvalue.r * normScale;
 		g = newvalue.g * normScale;
 		b = newvalue.b * normScale;
-		a = newvalue.a;
+		a = 1;
 		return *this;
 	}
 
diff --git a/wadsrc/static/zscript/mapdata.zs b/wadsrc/static/zscript/mapdata.zs
index d3fd0d21b5..3628ca7508 100644
--- a/wadsrc/static/zscript/mapdata.zs
+++ b/wadsrc/static/zscript/mapdata.zs
@@ -67,7 +67,7 @@ struct Side native play
 	//DBaseDecal*	AttachedDecals;	// [RH] Decals bound to the wall
 	native readonly Line linedef;
 	native int16	Light;
-	native uint8	Flags;
+	native uint16	Flags;
 
 	native TextureID GetTexture(int which);
 	native void SetTexture(int which, TextureID tex);
@@ -159,7 +159,7 @@ struct Line native play
 	native uint						activation;	// activation type
 	native int						special;
 	native int						args[5];	// <--- hexen-style arguments (expanded to ZDoom's full width)
-	native double					alpha;		// <--- translucency (0=invisible, FRACUNIT=opaque)
+	native double					alpha;		// <--- translucency (0=invisible, 1.0=opaque)
 	native readonly Side			sidedef[2];
 	native readonly double			bbox[4];	// bounding box, for the extent of the LineDef.
 	native readonly Sector			frontsector, backsector;