In both figures, the display resolution is four pixels wide by three pixels high. The superimposed grid depicts the size of a pixel. Both figures show supersampling at three times the height and three times the width of the display resolution.

In the right figure, the samples are regularly spaced. In the left figure, the positions of samples are displaced by a random amount. The random amount is small relative to the size of the pixel. This method of perturbing the sample positions is known as "jittering." Jittering adds noise to the rendered image. The advantage of jittering is that the human eye tolerates noise more easily than it tolerates aliasing artefacts, and as a result, humans perceive a higher quality in the rendered image.