GetEstimatedLightAndShadowMapMemoryUsage ( int32& TextureLightMapMemoryUsage, int32& TextureShadowMapMemoryUsage, int32& VertexLightMapMemoryUsage, int32& VertexShadowMapMemoryUsage, int32& StaticLightingResolution, bool& bIsUsingTextureMapping, bool& bHasLightmapTexCoords )