File:H αντιληπτική πλάνη του πλέγματος Hermann σε επένδυση τοίχου με πλακάκια.jpg

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English: It is an optical illusion . The brain sees grey blobs at the intersections of a white (or light-colored) grid on a black background. The grey blobs disappear when looking directly at an intersection. The same happens here. The photo was taken from a toillete wall. The material you see is tile as wall panelling. As you can see with the green colour you have the same effect.
English: Grid illusion on a wall tile
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Author Ianosianos

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Date/TimeThumbnailDimensionsUserComment
current16:58, 30 November 2015Thumbnail for version as of 16:58, 30 November 20151,536 × 2,048 (1.09 MB)Ianosianos (talk | contribs)User created page with UploadWizard

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