http://www.coolopticalillusions.com/blog/2008/01/19/how-to-add-a-little-illusion-to-your-tattoo-a-comparison-of-drop-shadows/same-image-but-no-shadow-this-time/ Optical Illusions, Brain Teasers, and a sprinkling of funny stuff. Fri, 10 Sep 2010 04:15:30 +0000 http://wordpress.org/?v=2.1.3