Added postrender

Globals.h

@@ -1,6 +1,7 @@
 #pragma once
 #include "DataModelInstance.h"
 #include <G3DAll.h>
+#include <stack>
 
 class Globals
 {
@@ -20,5 +21,6 @@ public:
 	static const std::string PlaceholderName;
 };
 
+extern std::stack<Instance*> postRenderStack;
 extern std::vector<Instance*> g_selectedInstances;
 extern bool running;