[jccalhoun]

Some of these are pretty cool but I always feel like the ones that depend on the camera being in a fixed perspective aren't nearly as cool.

[matsemann]

Some of them actually work quite well in real life. Even when looking with two eyes (thus giving your brain information about depth) and from a non-perfect angle. I've had exhibitions with these in the physical world, and no one can avoid seeing the illusion, even after picking up the objects and seeing the secret. The brain is stupid!

https://github.com/Matsemann/impossible-objects

[IshKebab]

I agree, with a fixed perspective you can show anything you want.