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But it's not just the lava lamps bubbles but also the "noise" in the photographs that they're using, how is this different than radio static?
That's not what the article claims. If it's the case then so be it but if photo noise is what they're using, which modern cameras are designed to limit, then I don't see the need to include the specifics about the lamps. It seems the lamp movements are the real source.Cloudflare said the lights, blobs, and movements of the lava lamps are recorded and photographed, after which the footage is turned into “a stream of random, unpredictable bytes”.