Foreshortening

Sacrifice of Isaac, created by Andrea Mantegna, is a great example of foreshortening. Forshortening is "the dimentions of the closer extremities that are adjusted in order to make up for the distortion created by the point of view." You see the acceptance in "Isaac's" face, and the noble expression in the mans eyes, when he's looking at the hand coming out of the wall. It's a very distorted painting, and represents the the functions of three-dimensional objects.