Why is this Buddha smiling? Can anyone tell me? Last year, while I was on my Student journey to Greece, Santorini I saw exact copy of this awesome 3D “painting” in the shop window of some souvenir store. How amazed was I when I found this photo online. If I hadn’t experienced the effect in real life, I would never have noticed the original illusion it hides. I’ve browsed YouTube for a while, and found the clip I wanted to share. The hollow face Buddha illusion works like this: the face of the Buddha is 3D, which can be easily seen from the photo. What isn’t so obvious, is that the face is in fact concave (hollow). When you move around the sculptured painting (in real-life), you get the impression that Buddha is following you, turning it’s head in your direction, and always starring directly to your eyes. The effect is really amazing. The principle is similar to Little Dragon illusion, The Big Dragon Illusion, and few dozen more. Most examples can be found inside the Videos category. You might also wanna check Einstein’s Hollow Face video.