The image appears to rotate counterclockwise.pic.twitter.com/vs4OUzLoDm
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They move at the same speed in the same direction for me.
Interesting: the rotsnake (3x2 circles) one has some which rotate clockwise & others counter-clockwise (the circles are different).
(Please retweet this corrected tweet if you do) Color is not indispensable. It seems color enhances this type of illusion to some extent.pic.twitter.com/x24qtwucpX
I am sorry for my mistake. "Color is not indispensable" is correct.
Ah, thank you: the second half of your tweet made that clear, as you said that it enhances to some extent.
Interesting. You say "indispensable", implying that it's essential to the illusion, but that still works just as well in monochrome for me.
Perhaps fractionally slower.
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