After that I added a Koopa Troopa, adjusted the height of the 2D background stuff, and added the thing that makes characters have shadows.
All I need to do now is figure out how to make the transparency work right on the trees. The alpha on the trees in front applies to the ones behind them, and to the aforementioned 2D background stuff. So what isn’t supposed to be there is obscuring things behind it with its invisibility. Apparently the Mario Kart Wii modding community calls this the “Harry Potter Effect” because it’s kinda like how the Invisibility Cloak works.
Once I fix that problem, I’ll finalize/improve all the textures and then get to work on the snow version.