Change of plans! I got fed up with depth-sorting isometric 2D, and spent the last few weeks learning and converting everything to 3D. It should be easier to program, make content, and design for now since I won't be fighting weird depth-sorting problems every step of the way. 3D will have it's own learning curve and hurdles, but I'm feeling good about it and hoping things will go a bit smoother now.
I finally got walls generating on the tracks now, too :)