In the real world, you can't see everything at once – only bits and pieces at a time. However, most paintings illuminate all of their goodness simultaneously. One looks at the art all at once, appraising it and examining the finer details. With real life, one can never seen everything under the same light. I think it would be amazing to make a piece of art that looked one way normally, but completely different when viewed under a blacklight instead of a normal light. It would thus have a special kind of duality to it that other paintings would not, in a kind of "all is not what it seems" sort of way.