Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: Polymax on 2013-04-21, 22:06:00

Title: Emitters + CoronaLights = noisy light from CoronaLights
Post by: Polymax on 2013-04-21, 22:06:00

Why CorobaLights getting a lot noisier when used together with large emitter?

Title: Re: Emitters + CoronaLights = noisy light from CoronaLights
Post by: maru on 2013-04-21, 22:58:15

Tried setting Lights Samples Multiplier to higher value? (if it doesn't work then try MUCH higher like 32)

I think it's some kind of adaptive light sampling that in this situation is focused more on indirect lighting.

Title: Re: Emitters + CoronaLights = noisy light from CoronaLights
Post by: Polymax on 2013-04-21, 23:14:35

Quote from: maru on 2013-04-21, 22:58:15

(if it doesn't work then try MUCH higher like 32)

Yes, i know, it's work, but very long!

Title: Re: Emitters + CoronaLights = noisy light from CoronaLights
Post by: Polymax on 2013-04-24, 14:29:46

small correction, noise adds parameter "directionality"

Title: Re: Emitters + CoronaLights = noisy light from CoronaLights
Post by: Ondra on 2013-04-24, 14:32:39

yes, I know about these defficiencies, I'll fix them in the summer.

Title: Re: Emitters + CoronaLights = noisy light from CoronaLights
Post by: Polymax on 2013-04-24, 19:16:05

and another:
"Directly visible" parameter in the CoronaLight does not work properly if there is emitter.
1. CoronaLight ceases to give light about yourself
2. More noisy
3. Less intensity

Title: Re: Emitters + CoronaLights = noisy light from CoronaLights
Post by: Ondra on 2013-04-24, 20:19:01

this is a feature. What I should do is separate "directly visible" and "visible in reflection" checkboxes, then you would uncheck only the first one and it would work ok

Title: Re: Emitters + CoronaLights = noisy light from CoronaLights
Post by: Polymax on 2013-04-24, 20:23:43

ok, it will be fine!

Title: Re: Emitters + CoronaLights = noisy light from CoronaLights
Post by: iliyang on 2013-04-24, 22:34:48

Quote from: Keymaster on 2013-04-24, 20:19:01

this is a feature. What I should do is separate "directly visible" and "visible in reflection" checkboxes, then you would uncheck only the first one and it would work ok

In either case, the intensity of the light shouldn't change. Only it's visibility and potentially the noise. That is, the "visible (in reflection)" setting should be accounted for in the MIS weights. Even with the current implementation the intensity shouldn't change depending on the setting.

Title: Re: Emitters + CoronaLights = noisy light from CoronaLights
Post by: Stan_But on 2013-04-25, 13:31:53

anymore testing about noise and visibility of lights + emitters

http://3dcenter.ru/forum/index.php?showtopic=113708&st=1575&gopid=1476881&#entry1476881  (http://3dcenter.ru/forum/index.php?showtopic=113708&st=1575&gopid=1476881&#entry1476881)

may be it would be useful

one more thing: looks like increasing count of emitter's faces we get more noise. Solution is to make more simple geometry for emitters. Daily build 18.04.13

Title: Re: Emitters + CoronaLights = noisy light from CoronaLights
Post by: Ondra on 2013-06-03, 15:47:08

"Directly visible" no longer influences intensity