Share 'WMZ art quiz - test your art smarts with this week's tough question'

The answer to, and winner (if any) for, our last contest question of:This art theory suggests that there was a major science development in the late 1420's and early 1430's that allowed painters to cheat. From then on this trade secret allowed artists to trace portraits and still life subjects. Almost overnight painting went from cartoony, to ultra realism. Name the art theory and the pair that c…