Great! Do you have a link to the interactive javascript(?) version pictured with buttons so we can try some things?
The perptual diamond: The diamond remains fixed in one place but appears to move up, down, left, or, right. See how far away you can be from your screen before the effect goes away. From https://journals.sagepub.com/doi/full/10.1177/2041669518815708 …pic.twitter.com/af7BOUCvfC
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Thanks for asking. Here is a link to an on-line interactive demo: http://shapirolab.net/P5/Diamond/ The on-line version is not exactly the same as the one in the GIF, but it does have a few more buttons!
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That’s incredible
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Is this related to the "Motion without movement" effect decided by Adelson & Freeman in the early 90's? Basically cycling phase-shifts of image structure parallel to the object border...
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The motion process is the same as reverse-phi; it is the 4afc configuration that is (perhaps) useful. The cool part is that the motion direction can be resolved when the edges have a thickness of 1 sec (!) of visual angle. Try it out.
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this diamond is moving. you can't say it's not moving
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About six metres away
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Also interesting: How much of the diamond do you need to see for the effect to work (scroll down so you can only see a little)
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Yeah I cover most of it with my hand to only see a corner of it and it still works (at least for up and down
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It only appears to move when the white and black bevel lines appear on each side. When these are absent the illusion is gone.
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