The “Café Wall” Optical Illusion

If I manufacture it, will you sell it in your store?

It’s named after the tiled wall of a cafe in Bristol, England – just round the corner from my house.
There’s more about it here, with a picture showing the wall: http://www.michaelbach.de/ot/ang_cafewall/index.html

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http://maps.google.co.uk/?ie=UTF8&layer=c&cbll=51.456961,-2.597532&pan oid=OsQ8ktiSfq11TX20sJASmA&cbp=12,256.68051465171436,,0,4.648936170212 7505&ll=51.456948,-2.597537&spn=0,359.963694&z=15&lci=com.youtube.all

The Beaudry subway station in Montreal, inaugurated in 1966, had this exact illusion with the tiles on the interior walls. Unfortunately, it was renovated in 1999 and they scraped the illusion design.