Three-Dimensional Platformer Tech Demo.
Ah, I see! So, you're still using the same logic pretty much. The difference is that with Paster, it gives a lot more room for 3D manipulation, with a restriction of detail that might be possible with pre-rendered sprites.
I originally tried using Paster as well, but for some reason I would run into an issue of the game completely freezing whenever the rendered quads were viewed at a certain angle. Aside from that, it worked for me quite well. I just can't understand why it freezes. The math used to translate the Paster quad is perspective though, the math may be different. I'd have to check.