Gridcosm

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„Gridcosm is a collaborative art project of the online art collective SITO, in which artists from around the world contribute images to a compounding series of graphical squares. Each level of Gridcosm is made up of nine square images arranged into a 3-by-3 grid. The middle image is a one-third size version of the previous level. Artists add images around that center image until a new 3-by-3 grid is completed, then that level itself shrinks and becomes the „seed“ for the next level. This process creates an ever expanding tunnel of images, the newest level a direct result of the previous level which is a result of the previous level… and so on.
To date, 300 artists have contributed more than 4000 levels (32000+ images) to the project.“ (source: en.wikipedia.org/wiki/Gridcosm)

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CC BY-SA 2.5, https://en.wikipedia.org/w/index.php?curid=6108970