Another example of what we see being dictated by what else we see. And how two things that are the same look completely different in different contexts.
Below, the circles match between both pictures, same with the chess set. It’s only the background that differs. But, what looks different to you?
Do you ever wonder what else your brain does that leads you to believe something that might not be real?
http://www.nature.com/nature/journal/v434/n7029/fig_tab/nature03271_F1.html