As I was struggling to pull my drawings together, I realized that it
didn't matter how good my line got, because I couldn't tell what I was
looking at. The topic was the human body, and more specifically, the
back. If you've gone through life drawing, perhaps you know the
problem. You're sitting in your workshop, a reasonably muscular man is
posing, his back is turned to you, and... what is going on? What are
all those bumps and ridges?