block by Kcnarf 56a2e78c6df01d6e17556c21cfe583af

Popple spiral illusion

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This block is a recreation that attemps to recreate an optical illusion I’m particularly fan of, called the popple illusion. This particular illusion disturbs perception of lines. Here, concentric rings no longer appear as rings (at least, for me !). It works also for 3, 2, or even 1 ring(s).

More on this optical illusion at Akiyoshi Kitaoka‘s dedicated web site’s page.

Acknowledgments to: