Monday 12 July 2021

seeing isn't believing

Danny Yee’s always-interesting Pathologically Polymathic blog pointed me to a great app by Michael Bach for exploring Syke’s Oblique Grating optical illusion.

Set up a grid:

Add some checkmarks:


Rotate every other checkmark by 90 degrees:


Mind. Blown.

The app allows you to explore the effects of changing checkmarks, changing the grid, and so on.  The illusion needs a very specific setup.


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