Bone, that's some cool stuff you have there, well done! Looking forward to seeing more!

@ samtheman, I've created a (2d, grid-based) train-simulator, and the hardest part was, I think, to make the junctions work and look good. Somehow, pieces of rail need to be "blocked" when trains are moving on them, and that can be very tiresome to get it to work right. Take great care when planning how to code junctions, especially if there's free-form building involved. Trains need to "see" that the junction before them is blocked by another train.

An idea would be to simply "block" all path-nodes infront of a train, so that other trains see that a train's approaching the path node without having to constantly keep track of all trains.