Here's my first attempt at a track. It's the now defunct Green Valley Raceway. I used real world elevation info for it (on the parts that aren't covered over with houses now). Anyway I'd like some feedback on it. It's not finished, but just basic at the moment. Download it here. It'll only be available for a short time, then I'll submit a finished version if/when I get time.
refrences:
http://www.youtube.com/watch?v=UPjlW84HwYI
http://www.youtube.com/watch?v=ZS9FSk7pujw