i randomly stumbled upon this (looking for info on the last brazillian presidential elections!). all the text was in in portuguese, but it looks like it's a belgian artist, Ben Heine. nice old school augmented reality, none of this QRC bollocks artifice!
This is a FREE middle school/ high school art lesson plan on one point perspective and values. The .zip file download contains a lesson plan, rubric, handout, student examples and Prezi presentation on 1-point perspective and MC Escher's artwork. Enjoy and don't forget to leave feedback!