Topology-disturbing objects: a new class of 3D optical illusion (2017)

I never knew it's so simple to embed 3D visualizations. How does GitHub do this? How can I do this on my own website? What's the name of the tech I should google?

JetSpiegel• 7 years ago

https://i.imgur.com/g5Ot0rH.mp4

300kb video instead of 6MB GIF

ur-whale2• 7 years ago

OBJ file anyone ?

lisper2• 7 years ago

https://www.thingiverse.com/Matsemann/collections/matsemanns...

That link has STL, not OBJ, but maybe that's good enough.

ur-whale2• 7 years ago

Very neat, thanks.

Loading one of these things in blender and rotating it around is really worth doing, and it's totally weird: when you rotate most 3D objects interactively, you can get a good grasp of their shape, but these things feels like they are specifically designed to prevent that from happening.

yarg2• 7 years ago

This is old enough that the year (2017) should be in the title.

Also, the optical illusion isn't really 3d since it relies on a single point perspective - it'll show up on camera, but if you see it with two eyes you'll see the actual structure.

Now for a real 3d optical illusion, look at the hollow face illusion - not on video - find a real life instance of a depth reversed face.

Your brain has circuitry specifically optimised for facial recognition, and what you're seeing so confuses your mind that it breaks depth perception.

It will actually appear as if a static object is turning to follow you around the room.

ColinWright• 7 years ago

.. if you see it with two eyes you'll see the actual structure.

I'm interested to know if your statement based on personal experience.

I have some of Sugihara's work, and what you claim is not the case. If you view it from a sensible distance (over 30 cms or so), and even if you know how it works, the illusion is still effective.

Of course the illusion disappears if you view it from radically the wrong direction, or from less than 10 cm, but based on my experience, your claim seems over-stated.

yarg2• 7 years ago

Even then, it's still not 3d - it's based on lighting and a lack of contrast - it's a projection based illusion that requires distance so that the variations between the two two-dimensional projections are not enough that your brain re-comprehends what it's looking at.

I'm not saying it isn't cool - there's something quite neat about the fact that the brain misinterprets what it's seeing as the nearest known 2d icon.

But it's not 3-dimensional.

caleb-allen• 7 years ago

Is this the same type of illusion?

https://www.youtube.com/watch?v=oWfFco7K9v8

Topology-disturbing objects: a new class of 3D optical illusion (2017)

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