shift capturing from a globalMacro to a sceneRenderstate S32

lets us ditch shader recompilation so that can be done on the fly without hitches, though does cost us a per-shader const for objects and postfx

Engine/source/materials/processedShaderMaterial.h

@@ -104,6 +104,7 @@ public:
 
    GFXShaderConstHandle* mNodeTransforms;
 
+   GFXShaderConstHandle* mIsCapturingSC;
    struct customHandleData
    {
 	   StringTableEntry handleName;