> Add enviornment media to your scene.

This wouldn't add the effect he's after. Bloom is not only the glaring
effect around a lightsource (often also called "halo"), but also the glaring
effect off of highly reflective surfaces, such as metall or glass. To
describe it, I often resort to telling about too long/high exposure of a
photograph: bright spots will "bleed" into the surrounding area. That's what
bloom is all about. Environment media will only add this effect with direct
light, not indirect light, unless you add media photons, and then you
quickly get into the area where tons of tweaking will get good results for
one image, but bad for another, along with an incredible amount of RAM
required to store all those photons...

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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