I've always wanted to try to make a Yeastman style SX track, and I finally got one done. Maybe not as visually dynamic as his but this one is specifically designed to not bog down with all 8 trucks on screen and the draw distance maxed. My best time is a 1:38 but that is far from optimized and I was more testing than trying to lay down quick laps. Trying to use this as a way to jump start MTM2 track making as a whole, the IndyCar Racing II community is back at it making tracks and that's a much more complex task.
Enjoy!
http://www.mtm2.com/MTM2/Tracks/tracks. ... rles+River