The Checker Shadow Illusion is an oldy, and remains a goody. The illusion shows how bad we are at gauging luminance, our eyes and brains are easily tricked by relative brightness and especially we ...

Anoka Faruqee and David Driscoll, Relative Brightness, installation view (courtesy the artists and Koenig & Clinton, Brooklyn, photo by Jeffrey Sturges, New York) Straightforward in structure but ...