In Repetitions, Joshua Greenberg uses Photo-Based Imagery to create abstract art from urban settings. Squares of windows, color, and glass all become objects of repetition. Reflected clouds, sky, and sunlight give foreground, background and a sense of depth. Building profiles now project a sense of movement and balance as part of the emerging art. This series demonstrates how Photo-Based Imagery may help extend the use of less explored dimensions of photography to create abstract art.