uhhhhhhh......

This is a hard one.

Starfield is some sort of weird merge of the Creation Engine and id Tech 7. There even appears to be stuff in here that dates back to Morrowind.

I'm just going to leave this as a big fat "idk" until one day the code leaks and we can do a little more investigating on the matter. There appears to be more id Tech here than in Fallout 76.