One of Hans Aarsman's many insights into photography is that many people want photographs to imitate paintings. Aarsman was thinking about photographs of beautiful landscapes, or people on the deck of a boat. If you were to compare Mark Hartman's series "Untitled Billboards" to painting, though, it would be something more like the Abstract Expressionists: his photographs make abstract forms out of the colorful scraps left behind by advertisements. There's a nice tension between the flatness of photographs and the very slight three-dimensionality that the different billboard layers. It seems possible that the photos are digitally altered, but how would that really change things anyway? If there is anything digital here, it's pretty subtle.