Scout attempts to hold a burro for backpacking at Philmont Scout Ranch. Photo by Jim Brown

Pictures are really two dimensional but can show depth by visual clues within the frame. Sometimes we see objects at various distances from the camera. In this case, a Scout works on a burro in the foreground while another teams packs a burro in the rear of the frame. If a picture has some interesting objects in both the foreground and background and the viewer pauses to study both, the picture shows depth.