Ok, here I am, smugly proud of myself for the math involved with Musikal Chairs (most of which was written by Zeh, Paul and Mike), and then I come across I ♥ Sketch, a magnificent application that blows my work out of the water (yet again).
I don’t really understand most of the views/terms in the tutorial, but assume they have a lot to do with architectural renderings. Either way, this program (and the modeler in the tutorial) make me feel significantly less intelligent than I thought I was. Enjoy.