It's been a while since I updated this project, so I've got loads of new screenshots. So far I've mostly completed the track work (minus some final tweaking) and have finalized the colour scheme. It's based on the idea that everything above a certain height must blend in with the sky, but here it's just been used for effect. I'll be needing some testers pretty soon, so if anyone volunteers it'll be most appreciated.
http://nldc.interfix.net/p1166