Quote Originally Posted by Kvess View Post
That’s all well and good, but some planes are just plain weird. How would you handle an immovable rod while standing on a gear within Mechanus or the clashing cube planets of Acheron?
I would make it immovable relative to the cog/cube, but those have a big difference with a ship:

They are gravity sources.

I suppose I could make some elaborate justification, but even without it "relative to locally dominant gravity source" sounds like a good rule of thumb.