For anyone who's confused about where to find the images: Click "Figures" in the sidebar on the right.<p>For anyone who's confused about how this works: The objects aren't what they appear to be from <i>any</i> angle. In fact, they're weird mirror symmetric objects that bend backwards in ways you wouldn't expect. It's our shape recognition that makes them look flatter than they are. This also makes them look like asymmetric objects that are facing a certain direction depending on the viewing angle, and <i>this</i> is the actual illusion.<p>It's sad that we don't get a 360 degree view, or even a couple of rotations of one of these, because that would make it obvious that the object goes from "proper shape" to "unrecognizable shape" to "flipped shape" depending on angle.<p>Anyway, when viewed in the mirror from certain angles, first of all the object doesn't change (because it's mirror symmetric). But because you view the mirror image from a different angle, it looks as if it's facing the other direction.
That is awesome. I can't wait to see the STL files people make so we can all print them up!<p>Meanwhile, here is a single mirror illusion STL file and a video showing off how similar illusions work <a href="https://www.thingiverse.com/thing:1970522" rel="nofollow noreferrer">https://www.thingiverse.com/thing:1970522</a> You can play with the STL in 3D and get a bit of an idea of how it works.
I've implemented some of Sugihara's work earlier. Downloadable files for 3d printing and examples I've shared here: <a href="https://github.com/Matsemann/impossible-objects">https://github.com/Matsemann/impossible-objects</a>
The apparent failure to mirror "correctly" left and right in this illusion reminds me of a great interview question I heard: why does a mirror reverse things left and right, but not flip them top and bottom?<p>It can be fun to watch people scratch their head over it.
This seems like a version of the ambiguous cylinder illusion
<a href="https://youtu.be/yupxceBjDa0" rel="nofollow noreferrer">https://youtu.be/yupxceBjDa0</a>
I am illusioned right now.<p>Are these special objects? Which figures in the article are thoe being displayed in?<p>To me, each example basically "works" if you pretend its not a mirror corner but just a solid mirror at an angle. I'm guessing this is not the intent though?