Don't trust your senses

A friend sent me an email with some of this guy, Julian Beever's sidewalk chalk drawings.
They are UNBELIEVEABLE!!!!
He draws them in such a way that from a specific angle the images look 3-D. Not just sort of 3-D, but really convincingly 3-D. Check out what I mean.

The view from that key viewpoint



The view from the "wrong" angle



(He's on his knees for this one)



This one was commissioned by a company called Procom



Wow



This guy has mind-boggling talent.