Anamorphic art, pretty awesome stuff. A few years ago I started seeing it pop up everywhere. They even had a tv show following street/chalk artist Julian Beever who uses this style.
There are artists all over the world now taking this technique and flipping it on its head...
Just came upon the piece below which is just AWESOME...yes AWESOME...Mexican Studio Golpeavisa, with its great use of space and props to create the portrait of Chef Rene Redzepi for Clase Premiere Magazine. Take a second and actually look at the piece below to get a good idea of the detail used to create the portrait. Really cool and a great way to force us to look at things just a little differently.
more pics and a video in the link below