I've been spending these last couple of week re-rendering my digital caricatures based on what I'm slowly learning about lighting a scene properly.

In this first image, I used that highly touted three point lighting system that photographers are supposed to use. The problem is that the lights were located haphazardly with no regard to shadows and highlights. Could've been done better.

The second image positioned the lights at a 45 degree angle from the subject. One light source was even situated to place highlights in each pupil, which the first picture didn't have. It's a little darker in tone, but I think more lifelike.