Seymour to be honest this sounds like Quarry without the ground and without the boundaries...Basically what I've seen is that all the maps I've played on (without the floor) seemed to have been set up for that type of play. I mean you've been on quite a bit of my hosts, and you can see what I'm talking about.
Are you talking about the OP or my suggestion? I was the one who mentioned the sphere-like map from Mario Galaxy, I don't know how that would be related to Quarry (unless it turned out to be a terribly horrid map).
Also, I've only played on your server once, that I can recall. It was a weird, psychadelic experience, btw. Cool server, I admit.