Fix undying alpha textures

Author: mmdanggg2

Inc/D3D9Config.h

@@ -88,7 +88,7 @@
 	#define UTGLR_NO_LODMESH 1
 	#define UTGLR_NO_VECTOR_MEM 1
 	#define UTGLR_HAS_DARK_LIGHT 1
-//#define UTGLR_USES_ALPHABLEND 1
+	#define UTGLR_NO_PALETTE_ALPHA_FIX 1
 #else
 	#define UTGLR_VALID_BUILD_CONFIG 0
 #endif

Inc/D3D9RenderDevice.h

@@ -335,6 +335,14 @@ static inline DWORD getBasePolyFlags(AActor* actor) {
 	else if (actor->Style == STY_Modulated) {
 		basePolyFlags |= PF_Modulated;
 	}
+#if UNDYING
+	else if (actor->Style == STY_AlphaBlend) {
+		basePolyFlags |= PF_Modulated | PF_Translucent;
+	}
+	else if (actor->Style == STY_AlphaBlendZ) {
+		basePolyFlags |= PF_Modulated | PF_Translucent | PF_Occlude;
+	}
+#endif
 
 	if (actor->bNoSmooth) basePolyFlags |= PF_NoSmooth;
 	if (actor->bSelected) basePolyFlags |= PF_Selected;
@@ -1101,6 +1109,18 @@ class UD3D9RenderDevice : public RENDERDEVICE_SUPER {
 			PolyFlags &= ~PF_Masked;
 		}
 
+#if UNDYING
+		// Clear the unused NoPass flag, which == PF_AlphaBlend
+		static_assert(PF_NoPass == PF_AlphaBlend);
+		PolyFlags &= ~PF_NoPass;
+		if (PolyFlags & PF_Translucent && PolyFlags & PF_Modulated) {
+			// Translucent + Modulated indicates AlphaBlend
+			PolyFlags |= PF_AlphaBlend;
+			// Don't act as these anymore
+			PolyFlags &= ~(PF_Translucent | PF_Modulated);
+		}
+#endif
+
 		//Only check relevant blend flags
 		DWORD blendFlags = PolyFlags & (
 			PF_Translucent | 

Src/D3D9Render.cpp

@@ -571,7 +571,7 @@ void UD3D9Render::drawFrame(FSceneNode* frame, UD3D9RenderDevice* d3d9Dev, Model
 		}
 		for (AActor* actor : visibleActors) {
 			UBOOL bTranslucent = actor->Style == STY_Translucent;
-#if RUNE
+#if RUNE || UNDYING
 			bTranslucent |= actor->Style == STY_AlphaBlend;
 #endif
 			if ((pass == RPASS::NONSOLID && bTranslucent) || (pass == RPASS::SOLID && !bTranslucent)) {