Deborah R. Fowler
Wave Illusion
Posted Dec 3 2015
Recently on Facebook I saw another post about optical illusions. (see circle illusion for more fun as well).
http://beesandbombs.tumblr.
This looked like a fun thing to try in Houdini. Thanks to Dave Whyte for the inspiration.
Other sites of interest:
http://flrn.nl/gifs/
http://codepen.io/