alpha test > 0 for M_dual

panda/src/pgraph/cullResult.cxx

@@ -224,7 +224,7 @@ CPT(RenderState) CullResult::
 get_dual_transparent_state() {
   static CPT(RenderState) state = NULL;
   if (state == (const RenderState *)NULL) {
-    state = RenderState::make(AlphaTestAttrib::make(AlphaTestAttrib::M_less, 1.0f),
+    state = RenderState::make(AlphaTestAttrib::make(AlphaTestAttrib::M_greater, 0.0f),
                               TransparencyAttrib::make(TransparencyAttrib::M_alpha),
                               RenderState::get_max_priority());
   }