A simple example

The awning is blanked to a accomplishments color, such as black. Then, a dupe is fatigued on the appropriate of the screen. Next, the awning is blanked, but the dupe is re-drawn or bifold hardly to the larboard of its aboriginal position. This action is repeated, anniversary time affective the dupe a bit to the left. If this action is again fast enough, the dupe will arise to move calmly to the left. This basal action is acclimated for all affective pictures in films and television.

The affective dupe is an archetype of alive the area of an object. More circuitous transformations of article backdrop such as size, shape, lighting furnishings generally crave calculations and computer apprehension instead of simple re-drawing or duplication