@UberGoober Codea might well do shadows, I just haven’t figured it out yet. I did wonder about the ray stuff in the physics section, but decided that for these projects then a simple circle would be enough.
The road is made of lots of little slats, but they are carefully shaped to fit together. The vertices at the joins precisely meet. However, the texture is not great as it’s just using one of the standard textures for each face and as they’re quite thin then it doesn’t look so good. To get it looking good then the texture should be split up over several slats. That’s on my list of things to do.
The other improvement I have in mind is to be able to do half twists, so that as the ball bounces round the track then when it gets back to the start then it is on the other side of the track (like with a Möbius strip). The old code could handle this, but the current code doesn’t.