Rasterbator creates huge, rasterized images from any picture. Upload an image, the website rasterbates your image, and then returns a pdf print. The resulting multi-page pdf file can then be assembled into extremely cool looking posters up to 20 meters in size. Go to the Rasterbator site upload your photo, specify your preferences and rasterbate regularly.
This takes the concept raises it up a notch:
http://transmaterial.net/index.php/2009/02/08/textured-image-panels/
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