Automatic Canyon Track Generator

I've seen algorithms to generate a racetrack, which usually works by sampling a set of random points and creating a convex hull around them. However, instead of a flat road, I want the track to be a canyon in the ground. Is there any existing tool to create something like this?

For context, I'm creating a flying game where the user flies a plane through the canyon.

 

@dwrafter One can easily make something like that, using a 3d sculpting program like sculptris or zbrush etc. The texturing and UV unwrapping parts might be difficult for some though.

 

You can just use the flat road generated and lower it/elevate the rest of the terrain, I don't see what's the problem here, it's just how you're dressing the track up, doesn't make an actual difference.

you can use triplanar projection to take care of that no UV required.
requires other stuff if you want to have multiple textures.


edit: don't know what's going on with the text linking, just ignore it, haha