Flip - depending on the viewing angle, we see an alternating two or three pictures. The change is abrupt. The best results are obtained using two pictures, which should be in similar color scheme if possible. The use of strongly contrasting ../images is possible, but can cause the appearance of “ghosts” (appearing of the parts of a first scene when watching the other). The change between the pictures can be done in up-down movement (lenses arranged horizontally) or left-right (lenses arranged vertically). Better results are achieved definitely by up-down movement.