A couple of days ago a friend of me showed me this dragon. At first it wasn't really anything special, untill the moment he said to watch to the dragon and close one eye. When I started to move around, still keeping one eye on the dragon, I saw something really cool; It was as if the dragon was following my every move.

The thing that I mostly like about this, is that it's very easy to create. Just print the dragon and stick it to some firm paper. After letting it dry, cut the dragon out of the paper and assemble it using the tabs and there you have it. Your own optical illusion.

You'll keep on watching to this dragon, just put it on your desktop or something.

How does it work? If we move around when viewing a solid object, our brain knows how the object we are looking at should behave. However the dragon gives us the wrong clues, because we mis-interpret what its shape is. We assume that the nose of the dragon is pointing out towards us, but in fact the dragon's head is concave. 

Attached files:

Pop up dragon:
View illusion in action:

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