Here's an illustration I did a while back for Wizards of the Coast's Dragon mag. As is true for most of my commercial work these days, I did a quick sketch in Photoshop for client approval, and then proceeded to block it out in black and white. Once I was happy with that, I layed in the colour, and continued to paint (still in Photoshop) into it, pretty much until I ran out of time... that's often my signal to stop

Bad Dogs!