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

indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskV.glsl

@@ -0,0 +1,23 @@
+/** 
+ * @file shadowAlphaMaskV.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * $/LicenseInfo$
+ */
+ 
+
+
+varying vec4 post_pos;
+
+void main()
+{
+	//transform vertex
+	vec4 pos = gl_ModelViewProjectionMatrix*gl_Vertex;
+	
+	post_pos = pos;
+	
+	gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
+	
+	gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
+	gl_FrontColor = gl_Color;
+}