Hi I was wondering if there was anyway to prevent the structures from spawning in certain dimensions? I want it to spawn in the Overworld but I have the star wars mod and divine rpg so I would like it not to spawn in those dimensions. Is there anyway to do that? Or do these structures only spawn in the overworld by default

They normally spawn in the Overworld by default, but I've never seen a castle (nether forts don't count) in the Nether before. Maybe there's something you could change in the config files?

these should only spawn in overworld by default in 1.12 and as that it's only version i am supporting I am going to close this issue.