You should add a GUI that has buttons to load, or save a custom map. There could also be something like mission editor except all it does is make this terrain in-game, if do-able.
This isn't real terrain per-say, it's just generated in Milkshape and precariously added in the game.
This should probably be moved to "Maps", and kill the silence of a long awaited awakening of terrain.
Ive actually did this a while ago with smooth shaded terrain.https://www.dropbox.com/s/ctghc9gqkrz2pgs/Snapshot-000021.pngA major issue (and pain in the ass) is collision. As it only has a limit AND has to be convex (i think)
Break it up into chunks?
I wish Badspot/kompressor (probably kompressor, let's be honest) would implement a new terrain system.