In the lineart phase you have sketched a tilted side view to get the down-up perspective right. I've never seen that before. Thinking about it, it makes perfect sense. How did you figure that out? Is there a book eleborating on this?
Spectacular work! Almost faved your whole gallery! Keep being an inspiration!
I love getting the chance to see your work come together like this. I wish you had time to do that for each MOTU piece you've done so far (although I did see you posted your process on facebook for a few of your group pieces of MOTU).