Uploaded January 2015 | Updated September 2026, 6 hours ago

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This is a mini-tutorial showing a sketch I made in Processing which allows you to explore the cafe wall illusion. You can play with it here: openprocessing.org/sketch/179880

You can also watch the video and see the program at the same time on my blog: criticaltinkerer.blogspot.com/2015/01/the-cafe-wall-illusion-interactive-demo.html