Interactive, programmatically rendered optical illusions. Manipulate mathematical parameters in real-time, reveal underlying visual truths, and uncover the neurological mechanisms behind human sight.
A grid of dark gray squares on a black background separated by white corridors displays bright white dots at each intersection. As your eyes move across the grid, the dots appear to flash between white and dark gray.
Square A (outside shadow) and Square B (inside a cast shadow) appear to be radically different shades of gray. In reality, both squares share the exact same RGB color values (#707070).
First studied by Michel Eugène Chevreul, two inner target squares sharing the exact same RGB gray color appear vastly different: the target on the dark background looks bright, while the target on the light background looks noticeably darker.