Add Material Complexity debug view model

Source/Engine/Graphics/Materials/MaterialInfo.h

@@ -49,6 +49,9 @@ API_ENUM() enum class MaterialDomain : byte
     /// The particle shader used for volumetric effects rendering such as Volumetric Fog.
     /// </summary>
     VolumeParticle = 7,
+
+    API_ENUM(Attributes="HideInEditor")
+    MAX
 };
 
 /// <summary>