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Thank you. This is not "re-create /r/place in a weekend" territory. This is physical hardware development and a substantial logistical challenge.

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Found a video of one of their prototype scanners. IIRC they looked at like every scanning solution available and also got a bunch of universities and libraries to help them purchase and operate scanning equipment. Pretty cool stuff.

https://www.youtube.com/watch?v=YhL7qJYzcd4

edit: Next vid looks good too. In depth on different scanners.

https://www.youtube.com/watch?v=4JuoOaL11bw

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