I’ve always been a fan of stereography, the illusion of creating depth in a 2D image. My favorite form is Autostereogram. Quoted from wikipedia;
"An autostereogram is a single-image stereogram (SIS),designed to trick the human brain into perceiving athree-dimensional (3D) scene in a two-dimensionalimage. In order to perceive 3D shapes in theseautostereograms, the brain must overcome the normallyautomatic coordination between focusingand convergence."
You basically have to go cross eyed to see the images inside the images if you are new to this and try to focus and unfocus your eyes until you can recognize the image.









i actually saw that 3 D text
yeah, they make huge posters of these too, make interesting interactive wall art for ur guests