I dunno if this has been posted before, but GeX forwarded this to me:
Julian Beever is an english artist who’s famous for his art on the pavement of england, France, germany, usa, australia and belgium. It’s particularity ? Beever gives to his drawing an anamorphose, his images are drawn completely diforms which give a 3D image when viewing on the righ angle … see for yourself it’s amazing !!!