Chaos Corona for 3ds Max > [Max] Feature Requests

Calculate Bloom & Glare on final pass ONLY

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jtmorris:
Bloom & Glare Feature Request - Calculate on Final Pass

(apologies if this is already possible!).

It would be great if we could set the Bloom & Glare to only be calculated after the final pass is completed, so that it is not running continuously throughout the rendering process and using up resources that could be used toward the cleaning up the image.

For instance when I rendering an animation, I'd like to be able to set the bloom/glare parameters, click render, and only have the B&G pass calculated and saved on the final pass for each frame.

Thank you for your consideration!

maru:
Hi, this does seem to make sense, but...


--- Quote from: jtmorris on 2022-08-18, 08:20:05 ---so that it is not running continuously throughout the rendering process and using up resources that could be used toward the cleaning up the image

--- End quote ---

...do you have some measurements that would confirm that B&G is really significantly impacting render times?

romullus:
I think it would make most sense to load B&G calculations on GPU, leaving CPU all available for rendering.

maru:
I did a quick test here, rendered an image in 4k with LightMix, denoising, and bloom and glare on vs off.
The time difference was 2 seconds (10 min render time limit, ~12min total time spent).
The rays/s difference was 2.8%.

I understand this has some impact on the overall render speed, especially when rendering animations, but at the same time I don't think it's significant. If anyone disagrees, or has a sample scene which renders much slower with b&g enabled, please feel free to share here.

Frood:
I may be wrong but B&G update during rendering has already been optimized to be suspended if 1. VFB is minimized 2. network rendering is used. Basically a B&G update should only happen if you actually "see" the VFB. I was able to verify (1), not sure about network rendering. But I remember those optimizations have been there since the first dailies featuring B&G.


Good Luck

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