The only workarounds that we are aware of are for populating a new scene with materials setting from some other scene, as you discussed together with @tim in this forum thread: Quickly re-using models
But this won’t help for a completely new scene with 500 different materials. Do you have some ideas how to map FBX reflections related settings to Shapespark in a portable way? If this is doable, we could extend importer to import such settings.