An associated question please.
Am I legally entitled to paint images that are on the web (as accurately as possible) and then sell them?
(Not ones from here or of megalithic subjects).
http://painting.about.com/cs/artistscopyright/f/copyrightfaq5.htm
Unless you change it significantly, a straight conversion from pixels to paint would be in breach of copyright.
Nigel - I was once told by a card manufacturer that 'there should be at least six significant changes between your own and the original image for it to be deemed safe and not a direct rip off.'
J x