Usually the perfect arena to just let it all come out and experiment, the sketchbook is perhaps the most important tool at your disposal. These are a few of the pieces I felt are kind of neat - some sketches become incredibly detailed, lending you a better grasp of what it is you intend on achieving in a final drawing. But more often than not, if I work at a sketch long enough, then often it could become the final piece.

All artwork © Irving Martinez