Hannah Hoch, John Heartfield, Alvin Langdon Coburn, Man Ray, and David Hockney were experimental photographers who used traditional techniques to create abstract and conceptual works. Hoch created photomontages exploring concepts of beauty, race, and gender. Heartfield used anti-Nazi propaganda. Coburn developed abstract photographs using mirror systems. Man Ray created photograms or "Rayographs" by placing objects on light-sensitive paper. Hockney structured Polaroid photos to form abstract compositions. Their work would be found in galleries and textbooks rather than for commercial uses like advertising.