Wow! Thank you very much, Vitaliy! I didn't know about that! I remember having learnt a lot from Yu-Sung's post years ago.
Regarding perspective views in classical arts, I'm actually quite interested in some of them with multiple projection schema, or even with "conflicted" ones. Such as Escher's Up and Down and Convex and Concave, maybe even Picasso's Brick Factory at Tortosa. It should be fun to try reproducing the ideas behind them. :)
