Lame working title, but I have finally come up with an original layout worth sharing! I'm even starting work on 3D's (which are still a pain in the ass)
NOTE: In the pictures, as you can probably assume, the parts with the tunnels will be underground.
I'm satisfied with the track, and I don't care about "realistic" shaping. The unique part about this one will be it's terrain interaction. Which, eventually, if I can get it convincing enough, will make it a really cool coaster. Some pictures from Sketch-Up are shown below.
It is set in an area similar to Arches National Park, Moab, Utah. The layout takes riders gliding over arches and twisting though caves in the surrounding rock. It even has a preliminary (crappy) custom station!
I hope also to work on a custom .env file for the final product, but I'm more lost there as I am with 3D's.
EDIT: forgot to add it to Sketch-Up, but the barrel roll over the track (foreground in the third picture) will be hanging from another arch.