Thanks for the reply. Unfortunately that causes the effect Jim dreads - desktop icons appearing with his masterpiece! It destroys the perception of realism that he tries so hard to maintain. 
Dread may be eliminated - just don't produce anything.
A scientist or engineer invents something, but after it's produced, has no control over how it is used.
An artist creates something, but after it's legitimately copied, has no control over how or where they are used.
Consider "Mona Lisa" or "Scream".