@prehensile Do you know the context of this by any chance? I'm curious why it was done in wireframe; all I can think is some formulaic way of drawing things realistically--just learn how to draw a rectangle from all different angles and you can draw whatever, or something like that--but that's a wild guess.
-F
@Felthry I'm not sure! I found this short description of it and it sounds like our boy paolo was just fascinated by perspective per se: https://domeshadow.wordpress.com/paolo-uccello-study-of-a-chalice/