This is a compilation of some of the optical illusions and perceptual effects I have made in Shadertoy. Warning - flashing images. Some of these shaders involve flashing images. If you are at risk of a seizure due to photosensitive epilepsy or other conditions, don’t click play, navigate away. Many of these effects are based on the fantastic work of Akiyoshi Kitaoka @AkiyoshiKitaoka. Click the Title of each shader to view the shader in Shadertoy.