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