Wall-sized color seascapes of water, sky, sand, and bathers make up Richard Misrach’s photographs called On the Beach. An exhibit opens next week at the High Museum of Art in Atlanta. Misrach might be the prototypical California artist — surfer, Berkeley alumnus, VW bus owner — but Studio 360’s Sarah Lilley discovered that Misrach’s “On the Beach” photos are more complicated than they look.