Optical Illusion

[ralphmelton]

This is an incredibly strong illusion. I couldn't believe it was true until I covered up all the parts of the picture other than the relevant squares.

Comments

[seanmcguire.livejournal.com]

I didn't have any easy way to cover things up that was working, so I ended up opening the file up in an editor and erasing everything but the two squares. They *still* looked different to me until I also painted over the letters (in the color of the square.) Then they looked identical.

Then I reopened the original and drew lines across it using the color of both squares. I'd draw into the "lighter" square and my brain would act as if the line had just disappeared, and the line coming out of the square on the other end still registered as darker.