“These are the steps I took while painting “Portrait of Nathan”. The sketch was drawn with a ball point pen in a toned sketchbook. I used Photoshop CS and a Wacom Cintiq for the painting. The size of the painting is 8.6″ w x 10″ h, at 300 resolution.”
http://www.cgarena.com/freestuff/tutorials/photoshop/nathan/nathan.html