[NEEDS INPUT] Platform/Foundation texture clipping (stairs)

@cairnssmith I can confirm this in my game. A workaround is to choose stairs that come with side walls. But I have noticed another slight problem with building a platform on a foundation - the shading is different on a foundation from a platform side, so even if you're choosing the same wallpaper for both, you can see a line where they meet. I wish they sorted this out, it's the same for roof walls, so if you want a glass roof open to the room below, the gable walls look awful