The ‘Healing Grid’ by Ryota Kanai was a finalist in the 2005 Best Illusion of the Year Contest. stare at the centre for about 20 seconds and the broken edges appear to repair themselves in your peripheral vision. Kanai sez of it:
This illusion seems to indicate the preference of the visual brain to see regular patterns.
‘The Secret Of the Great Pyramid’ by French artist JR – thousands of strips of paper pasted to the courtyard outsde the Louvre by 400 volunteers to create a massive ephemeral anamorphic illusion celebrating the 30th anniversary of the now iconic but once reviled Louvre Pyramid. To wit:
The sun dries the light glue and with every step, people tear pieces of the fragile paper. The process is all about participation of volunteers, visitors, and souvenir catchers. This project is also about presence and absence, about reality and memories, about impermanence.