Thanks for comments; I really only posted this map to enable myself and a couple of friends to run the level.

At the time I built it (early on), I was simply unable to create a map with subterranean levels - this was the only way to fudge it. Admittedly, it can cause issues at certain camera angles.

Have to admit I thought the game was largely dead, so never checked back - I may look at updating the level, given the release of single player and continued interest in the game.

Cheers

Don't be lazy and build a holo world, put your underground levels UNDERGROUND, messes with the camera otherwise.

It's a fun map. I wish it had more energy batteries..