Photography has always been as much artifice as art. But software that seamlessly meshes images from unrelated settings has escalatead the debate over the validity of photographic reality. "Metamorphoses: Photography in the Electronic Age" (Aperture, $18.50) is a state-of-the-art look at the evolution of electronically altered images through the eyes of photographers and curators. The pictures range from serene to disturbing. In a series inspired by old family albums, Martina Lopez places stark turn-of-the-century poses in a vivid modern landscape. Pedro Meyer juxtaposes religious symbols (an angel, Jesus) with pictures of everyday Mexican life. Shelly J. Smith creates montages from a wide variety of sources. The overall effect is of a technoculture in transition. Someday, these pictures may seem as primitive as the ghostly prints of a pinhole camera.