I've always been astounded by the drawings of LTL. Their realized projects are incredibly impressive in their own right, but long before that comes these sparkling little jewels you see below.
Towards the back of their book they have a chapter describing their drawing process. It is a hybrid of hand drawing, computer modeling & drafting, and printing and tracing; a back and forth, trial and error, repeat and re-repeat process.
Lewis Tsurumaki Lewis