He was one of the best lecturers I've seen; he'd collect questions about the previous reading at the beginning of class, and realtime construct a lecture about the material by winding his way through answering all the questions.
The combination was pretty motivating; I spent many hours shading 3d graphs by hand. Mine weren't this nice, but I still wish I had them.
That class kicked my ass, but it was one of the most memorable classes that I took at Brown.
I wonder if that plays a role.
Fantastic article, thanks for sharing.