My guess would be "never". This would be a great feature, but it's not a "physical" effect, so it doesn't fall into the religious canon of things that Arnold devs want to deal with. I anticipate that the response you'll get, if any, is "fix it in post". But I'd love to be proven wrong.
Actually, glare can be implemented in a physical way, simulating lens scattering, lens data, etc. Like zoic and pota lens shader for arnold that you can get for free.
You can actually get "bloom" in arnold using volumes, as this effect is usually due to the medium your light is in, like so:
without the volume:
Volume rendering is super expensive. A non-physical solution will render WAY more quickly.
Thanks for the tip about ZOIC and POTA. But now the question becomes, when will MaxToA support camera shaders?
@Zeno Pelgrims is there a way to install the POTA camera shader so it will show up in 3ds Max? I added the .dll to the Arnold plugin path, and was hoping that it would show up as a camera type in the Create panel, but no. And the Attribute Editor template file is irrelevant to 3ds Max, right? It's only for Maya.
But i'm using arnold 5 i can't downgrade...solidangle should develop theirs,like octane
lens bloom is caused by a lens artifact not by volumetrics.
Bloom was added in Arnold 6.2: https://docs.arnoldrenderer.com/display/A5ARP/22.214.171.124
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