Beautiful and playful 3d Street Art

This video can be watched start to finish by any class. We watch (to a classical soundtrack) as artists first layout, then paint in the details of this street art. It is much larger than conventional street art, though like many 3D efforts really only works from one angle. My guess is that the camera feed we see (from the ideal angle) was on display on a large monitor. You can then see people posing and playing with the illusion. Possible areas of discussion: why people do things like this, how a 3D illusion works, the fact that only one camera viewpoint will actually work... you can cross reference to "tromp l'oeil" which is an art/architecture term for painting 3D realistic illusions on to walls and ceilings. This idea has been around for many centuries!