Below is our take on the classic optical illusion often referred to as the "Café Wall" illusion:
First described by Doctor Richard Gregory and Priscilla Heard in 1979. It was noticed that the front of a café (St Michael's Hill, Bristol, England) that had black and white ceramic tiles with grey grout.
You can see the effect on a rotated version of the image too:
If you want to learn more about this optical illusion you can check out orignal paper written by Doctor Richard Gregory and Priscilla Heard. (pretty nifty this is available online, so check it out).
Click one of the above thumbnails to view more images from our optical illusion gallery.