I'm not sure if this has been mentioned before but I was thinking, is there any data anywhere that is generated from real world cave systems that could be imported into outerra? I would LOVE to explore some real world caves in outerra and I think it would be an amazing addition to the engine/game. Even if it's randomly generated caves, if they at least have some sort of order to them so they can be tunnels that lead to large openings etc... that would also be awesome.
