Very cool illusion. I saw it once in my feed when I checked my phone very early in the morning and it took about a minute before they inverted. The second time (right now) it took a few seconds. A thoroughly strange sensation. So far I can't seem to make them flip back in the same way I can usually do with a little effort for similar illusions (e.g. the rotating statue, the tube train gif). Weird.
I wasn't able to see it, very frustrating. Probably because like you say, you can't make it flip once you see it properly.
ReplyDeleteWow. Cool effect!
ReplyDeleteBrain thinks the sun is at lower right when I look at the one at lower left. If I look away, the sun pops back
ReplyDeleteCopy of my comment from Joerg's post
ReplyDeleteI initially saw them from the bottom/underside/convex. They did indeed flip and I got stuck viewing them from the top. As suggested the top right was easiest to flip for me, I then move down and flip the round bowl, then continue to the square one... at this point they all invert.
It seems to be about mentally changing where the light source is. If the light source is on the left, then the shadows on the right are because of the indentations blocking the light, so everything is pushed out. If the light source is on the right, then in order for the shadows to be on the right, that means that it must be paper is folded inwards.
ReplyDeleteChris Greene ! That does it ! For me the easiest thing is to imagine the shaded sides are either sloping into or out of the page. When I think about it that way I can invert them (mostly) at will.
ReplyDeleteSort of reminds me of that feeling of stepping on an escalator that isn't moving. Despite it very clearly not being stationary, I always get an involuntary sense of acceleration as I step on.
It's your classic Reversible Image test, like the Wine Glass that's also Two People Kissing. Suggest they're upside-down and the mind sees that; suggest one may be upright, and the mind searches until it can see this.
ReplyDeleteI can easily flip these images. However, often images of cratered moons/planets just won't flip for me no matter how I try (if they are on paper I can turn them upside down and that usually helps). Even when I do flip the hard ones, they flip right back and I have to exert effort to make them flip to the correct impression.
ReplyDeleteI found they were much easier to flip back in peripheral vision (e.g., by looking at the "Originally shared by..." line), and I can keep them that way for a short time, but the bottom-middle one or the upper-right one always flips them back.
ReplyDeleteVery interesting.
Hmm... the last state I interpreted them in persists for several hours and dictates what state I'll see first when viewing again.
ReplyDeleteI was flying from Seattle to Phoenix once, a very early flight, and we were right over red rock country just as the sun was rising. I "flipped" the topography so that canyons were ridges, and couldn't flip it back. It was kind of unsettling.
ReplyDelete