Also, is the physics something that we even really want to do? The only reason to have it is to force the players to build mine shafts, and I'm not 100% that we want to force the players to do that if they don't want.
That was one of the initial ideas, but then players can't build with Stone, and I really don't want to restrict the players' building. I'm beginning to think we should just leave out the physics part. It will still be mine-like, since they'll need minecarts and rails for all the ore, since it won't stack.
I agree about the gravity part And the idea about veins spawning next to eachother sounds really cool to me. Maybe even on differend hights? and possible close to resources its supposed to spawn next to. (so you could find a node in a desert and could find something you find in deserts irl)