Woops sorry I only just saw this. I have it set up to run the setting of everything before trying to generate it now, thanks! 
I also just found out you were absolutely right, Materials do not save- but they do save in a struct in the same instance. When loading from a save, it clears the materials. I was only testing within a single instance, but now that I’m working between maps I’m finding I’m having trouble. Since the question of this topic is fixed technically, I’ll likely post another if I find I can’t get it working! Thanks for letting me know about the materials!