ついに立体的に動いて見える錯視が完成しました。キューブが回転して見えますね？止まっています pic.twitter.com/nyyWdr5O1E— じゃがりきん (@jagarikin) February 14, 2020
In very simplified terms, when our eyes see sudden transitions from either light to dark or dark to light, our brains perceive it as motion happening. Take yet another look at @jagarikin’s GIF, and you’ll notice that the edges of the cubes’ blue frames have a sliver of color to them. Sometimes they’re white, sometimes they’re gray, and sometimes they’re black, and as they’re cycling from one to the next, the video’s background is doing the same thing, and the result is the illusionary “rotation” of the cubes.
For more on the reverse phi illusion: "An optical illusion called 'reverse-phi motion' helps explain how we view moving objects, Stanford scientists find" Read the rest