Okay. So I decided to do a little bit of illustration work to see how it sells on the various stock sites I submit photos to. I've always enjoyed illustration (studied it at college in fact) but of the hand-dawn variety, rather than computer generated. Still, I thought I'd have a go with Adobe Illustrator and here's my first real effort which I'm glad to say has been accepted on most sites. I wonder where the first sale (if any) will come from? My guess is Shutterstock.