Okay, there’s an interesting story behind this one, but I’m sure you’d rather not hear it. I wouldn’t even use this one if I didn’t find the perspective of it so interesting and difficult. This perspective forces you to draw what you see, not what you think you “should” see. A lot of times when I draw something, I know how it is supposed to look, so I can draw it off of proportions I know to be true, and linear perspective, but this is very different.