Interactive, programmatically rendered optical illusions. Manipulate mathematical parameters in real-time, reveal underlying visual truths, and uncover the neurological mechanisms behind human sight.
First drawn by Oscar Reutersvärd and popularized by Roger Penrose, this shape depicts a solid three-dimensional object made of three straight beams that meet at right angles, yet form a closed triangle.
Developed by Danish psychologist Edgar Rubin, this famous cognitive illusion presents a double silhouette where viewers switch between perceiving a white vase or two black human profiles looking at each other.
First described by Italian psychologist Gaetano Kanizsa, three black 'Pac-Man' discs and three line angles induce the vivid visual perception of an upright white triangle overlaid on top of them.