Alphamasking migrated to shaders instead of using fixed-function. Very early code. Hasn't even made it into viewer-development yet.

indra/llrender/llgl.cpp

@@ -53,6 +53,7 @@
 #include "llstacktrace.h"
 
 #include "llglheaders.h"
+#include "llglslshader.h"
 
 #ifdef _DEBUG
 //#define GL_STATE_VERIFY
@@ -1642,6 +1643,16 @@ void LLGLState::checkClientArrays(const std::string& msg, U32 data_mask)
 LLGLState::LLGLState(LLGLenum state, S32 enabled) :
 	mState(state), mWasEnabled(FALSE), mIsEnabled(FALSE)
 {
+	if (LLGLSLShader::sNoFixedFunction)
+	{ //always disable state that's deprecated post GL 3.0
+		switch (state)
+		{
+			case GL_ALPHA_TEST:
+			enabled = 0;
+			break;
+		}
+	}
+		
 	stop_glerror();
 	if (state)
 	{