What is the difference between “up-to-down” and “left-to-right” orientation of change?
In general, “up-to-down” changing is preferred to “left-to-right” changing for flip, animation, motion and morphing as the image will be more clear and the ghosting will be less. It is because our left and eye see same frame, or view, at the same time for “up-to-down” changing image but it is not the case for “left-to-right” changing effect. However, for some applications, especially POP, signage, poster, “left-to-right” changing is the only choice as passerby walk across to see the changing images but will not jump up and down to see the image unless they are asked to do so.
