track exporting problem

[NaN]

Video is up: https://www.youtube.com/watch?v=zMvYuLx5H94

A few general issues, not related to exporting:

The road mesh is too low-poly for its height profile. The cars will get stuck at some point, as the road segments are interpolated by the game, while the collision mesh is not. You want height changes too be as smooth as possible.

The AI seems to have a hard time without having run-off areas, needs some work to make it able to drive such tracks.

You will also notice that the cars tend to get stuck when grinding along the rails, due to the way collision detection with meshes is set up. They are hitting mesh edges. This is a simulation issue, can be disabled, but needs a lot of testing with existing tracks.

Ideally we would have collision geometry not using the meshes used for rendering. I don't think we have the ressorces for this though.