Trying alpha-face rebuild using LL's method.

indra/newview/lldrawable.cpp

@@ -791,19 +791,7 @@ void LLDrawable::updateTexture()
 
 	if (getVOVolume())
 	{
-		/*if (isActive())
-		{
-			if (isRoot())
-			{
-				mQuietCount = 0;
-			}
-			else
-			{
-				getParent()->mQuietCount = 0;
-			}
-		}*/
-				
-		getVOVolume()->mFaceMappingChanged = TRUE;
+		//getVOVolume()->mFaceMappingChanged = TRUE;
 		gPipeline.markRebuild(this, LLDrawable::REBUILD_MATERIAL, TRUE);
 	}
 }

indra/newview/llface.cpp

@@ -319,7 +319,20 @@ void LLFace::setTexture(LLViewerTexture* tex)
 
 void LLFace::dirtyTexture()
 {
-	gPipeline.markTextured(getDrawable());
+	LLDrawable* drawablep = getDrawable();
+
+	if (mVObjp.notNull() && mVObjp->getVolume() && 
+		mTexture.notNull() && mTexture->getComponents() == 4)
+	{ //dirty texture on an alpha object should be treated as an LoD update
+		LLVOVolume* vobj = drawablep->getVOVolume();
+		if (vobj)
+		{
+			vobj->mLODChanged = TRUE;
+		}
+		gPipeline.markRebuild(drawablep, LLDrawable::REBUILD_VOLUME, FALSE);
+	}		
+			
+	gPipeline.markTextured(drawablep);
 }
 
 void LLFace::switchTexture(LLViewerTexture* new_texture)

indra/newview/llvovolume.h

@@ -297,6 +297,7 @@ public:
 	U8 mTexAnimMode;
 private:
 	friend class LLDrawable;
+	friend class LLFace;
 	
 	BOOL		mFaceMappingChanged;
 	LLFrameTimer mTextureUpdateTimer;