Worlds colliding :) . It's referring to image-manipulation technique https://en.wikipedia.org/wiki/Bloom_(shader_effect) , not CS concept https://en.wikipedia.org/wiki/Bloom_filter

Bloom is a standard effect in CGI and game dev to simulate the diffusion effect of really bright light sources that can be witnessed in real-world photography https://en.wikipedia.org/wiki/Bloom_(shader_effect)

It's a term for "light bloom" commonly used in rendering and games. https://en.wikipedia.org/wiki/Bloom_(shader_effect)

You're right that it's not that related to a bloom filter data structure.