diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index 35fb4a21a..b6b6cf588 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,3 +1,8 @@
+May 17, 2008 (Changes by Graf Zahl)
+- Fixed: All translucent blending operations for CopyColors must treat an 
+  alpha of 0 so that the pixel is not modified or texture composition as 
+  intended will not work.
+
 May 16, 2008
 - Fixed: 3D hardware texture filling did not copy pixels with 0 alpha,
   preserving whatever was underneath in the texture box previously.
diff --git a/src/textures/bitmap.h b/src/textures/bitmap.h
index 669218a5b..5d9b58a6f 100644
--- a/src/textures/bitmap.h
+++ b/src/textures/bitmap.h
@@ -312,42 +312,42 @@ struct bBlend
 {
 	static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = (d*i->invalpha + s*i->alpha) >> FRACBITS; }
 	static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
-	static __forceinline bool ProcessAlpha0() { return true; }
+	static __forceinline bool ProcessAlpha0() { return false; }
 };
 
 struct bAdd
 {
 	static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = MIN<int>((d*FRACUNIT + s*i->alpha) >> FRACBITS, 255); }
 	static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
-	static __forceinline bool ProcessAlpha0() { return true; }
+	static __forceinline bool ProcessAlpha0() { return false; }
 };
 
 struct bSubtract
 {
 	static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = MAX<int>((d*FRACUNIT - s*i->alpha) >> FRACBITS, 0); }
 	static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
-	static __forceinline bool ProcessAlpha0() { return true; }
+	static __forceinline bool ProcessAlpha0() { return false; }
 };
 
 struct bReverseSubtract
 {
 	static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = MAX<int>((-d*FRACUNIT + s*i->alpha) >> FRACBITS, 0); }
 	static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
-	static __forceinline bool ProcessAlpha0() { return true; }
+	static __forceinline bool ProcessAlpha0() { return false; }
 };
 
 struct bModulate
 {
 	static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = (s*d)/255; }
 	static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
-	static __forceinline bool ProcessAlpha0() { return true; }
+	static __forceinline bool ProcessAlpha0() { return false; }
 };
 
 struct bCopyAlpha
 {
 	static __forceinline void OpC(BYTE &d, BYTE s, BYTE a, FCopyInfo *i) { d = (s*a + d*(255-a))/255; }
 	static __forceinline void OpA(BYTE &d, BYTE s, FCopyInfo *i) { d = s; }
-	static __forceinline bool ProcessAlpha0() { return true; }
+	static __forceinline bool ProcessAlpha0() { return false; }
 };