For a long time I've had the idea of bringing fantacy tracks from the 2005 racing game "Forza Motorsport" into BeamNG. Unfortunately I don't yet have the mindset (or the time) to learn how to design proper maps so I've done the next best thing and used BeamNG's own Track Builder.
I've done my best using video references to make the track 1:1 (mostly by playing the game alongside videos and timing the distance from one corner to the next). But since I'm just eyeballing everything and the track builder has some limitations, there are definitely errors. Mostly in the back half I'm thinking.
I've also added some "signage" (just a bunch of cube obstacles everywhere) to make the track a little bit more visually appealing.