Voting opened yesterday for the Best Illusion of the Year Contest, organised by the Neural Correlate Society (http://illusionoftheyear.com). The contest has been running every year since 2005, and celebrates the best visual illusions devised in each year, from across the world, with many of the entries having some scientific publications behind them.
Every year's final 10 features some really awesome visual illusions. This year's list of finalists includes among others an icy, beautiful photo-grid-based tilt illusion "Just a Tree in Wintertime" by Lourens van Dijk, and the mind-bending "Squish Squash Illusion" by Stuart Anstis and Patrick Cavanagh, which shows the effect of contracting and expanding textures on foreground objects, while the entry "Once upon a time" by Marco Bertamini and Andrew Irving explores how relative movements of other objects influences our perceptions of a moving stimulus.
If you visit the site right now, you will still be able to vote for your favourite! Voting closes Oct 18 (USA EDT).