caricature sketching

Here's some caricature sketches done directly in Photoshop with no real sketch lines as a start.  Instead I sketched with tonal values, concentrating on the shapes and forms of the face and it's features.  This is a technique I learned from watching artist like Joe Bluhm and Jason Seiler work.  These are not meant to be finished by any means, they are just sketches, so they are full of mistakes, but it's fun and a great learning process to work this way.  If I wanted to refine these, it would not be difficult to do from this stage.