Looking for an Optical Illusion

Factual Questions
1

I’m not sure if this should be in Cafe Society or GQ, but I’ll try here. Apologies to the moderators if I’ve guessed incorrectly.

I’m looking for an optical illusion that I remember seeing in a magazine about 6 to 8 months ago. I think that it may have been in a popular science magazine, like New Scientist or Discover.

The computer generated image consisted of two panels, each containing a cube looked at corner-on. The faces of the cubes were tiled by colored tiles in a 10x10 (I think) grid. The illusion was that one tile on one cube appeared to be (say) blue, while another tile on the other cube appeared to be (say) yellow, but both the tiles were actually the exact same shade of gray. (It was similar in spirit to this illusion, only with color.) The illusion was generated in part by the fact that each of the cubes was bathed in different lighting.

Anyone know what I’m talking about? I’d be especially grateful if someone could give a link to this image.

2

Is it this? http://www.squarefree.com/color-cubes.jpg

3

Thank you, Dog80! That’s the one.

For others who may be interested in this illusion, I used Dog80’s link to find a bigger version at http://www.americanscientist.org/template/AssetDetailNoFrame;jsessionid=baacHwni4NN6vc?assetId=18915