Boards
M C Escher
That guy was such a tripper.
http://www.mcescher.com/Gallery/recogn-bmp/LW413.jpg
http://www.mcescher.com/Gallery/back-bmp/LW344.jpg
http://www.mcescher.com/Gallery/back-bmp/LW339.jpg
http://www.mcescher.com/Gallery/back-bmp/LW338.jpg
http://www.mcescher.com/Gallery/switz-bmp/LW320E.jpg
http://www.mcescher.com/Gallery/ital-bmp/LW268.jpghttp://www.linesandcolors.com/images/2008-06/escher_450.jpg
http://graphics.stanford.edu/courses/cs348b-competition/cs348b-01/escher/escher7s.jpg