His photo manipulation is very stunning because of its incredible simplicity. There is a cut down the middle of the photo and the division creates balance. The cut piece of the image is flipped but it is still understandable as an image in full.
David Hockney - This mural is made up of photographs. Even though the photos don't go together they still look really effective together. As I do photography I could take the photos, put them together and paint them.
Mapping 2013 on Behance Use a process like this for "identity/self-concept" activity about skin color/shade/tone/palette. Put vertical photo strip of every child together on a couple images to make a collective face.