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xkcd #2934: Bloom Filter
(imgs.xkcd.com)
Alt text:
Sometimes, you can tell Bloom filters are the wrong tool for the job, but when they're the right one you can never be sure.
That's the bloom shader effect: https://en.wikipedia.org/wiki/Bloom_(shader_effect)
But yeah, some people might refer to that as "bloom filter", although it's not what's meant here.
Thanks