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The reason the dress picture is interesting is that it is a real-world instance of the checkershadow illusion http://web.mit.edu/persci/people/adelson/checkers

• leppr 12y ago
  Yes, it combines that with the color hue equivalent: http://img.washingtonpost.com/blogs/wonkblog/files/2015/02/yellow-blue-dogs.jpg http://img.washingtonpost.com/blogs/wonkblog/files/2015/02/y... On another note, I'm wondering if people did comparisons on whether the size at which you viewed the robe had any effect on people's choice. Personally I can't see it as white because there are enough cues in the background that indicate that there isn't a strong blue light lighting the dress from the front. On the other hand if I shrink the image and squint, I can imagine it being a sort of backlit photo where the blue tint would just be a result of outdoor atmospheric diffusion and the contrast with yellow sunlight.