Oh yeah, thanks for the link! That's pretty much what I mean with orbit controls; I'm not sure that's the technical term for it, but it's what THREE.js calls it, so I'm gonna stick with it. It definitely has some advantages, but as it breaks the perfect cube symmetry, I'll have to figure out how to best handle things like if the bunny changes its orientation (which I guess might be to reassign "top" and "bottom" every time rotation mode is entered). I think in the end probably the best thing might be to implement a few different possibilities and then let the player choose their favourite in the options screen.