To the far left is a loose structural guide of his original face, followed by a rough reproduction of the original. I then progressively stretched his jaw longer and longer, and increased the size of his left eye as I went, taking myself waaaaay out of my comfort zone. At first the changes were exciting, but after a certain point the face simply seems disfigured. But at which point? I keep changing my mind. Right now, I think that only the last face is crossing over into disturbing. But yesterday I thought it was the second to last face, so maybe I am getting used to the stretch.
I think the 3rd to the last face most nicely balances interesting exaggeration without becoming creepy. Since I don't want the caterpillar to be creepy, this one will work nicely. What do you think?