An interference pattern produced by overlaying similar but slightly offset templates. Møiré patterns can also be created be plotting series of curves on a computer screen. Here, the interference is provided by the discretization of the finite-sized pixels.
See also Circles-and-Squares Fractal
References
Cassin, C. Visual Illusions in Motion with Møiré Screens: 60 Designs and 3 Plastic Screens. New York: Dover, 1997.
Grafton, C. B. Optical Designs in Motion with Møiré Overlays. New York: Dover, 1976.