Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: threedim on 2017-11-28, 12:35:07

Title: white point problem in the Interactive Lightmix mode
Post by: threedim on 2017-11-28, 12:35:07

Hi everyone, I have this white point problem in the interactive lightmix mode. I do not understand how to fix the problem. did any of you have the problem and solved it? probably will be a light issue, but I can not find the solution.
thanks to who can help me!

http://i66.tinypic.com/2lkbkok.jpg (http://i66.tinypic.com/2lkbkok.jpg)

Title: Re: white point problem in the Interactive Lightmix mode
Post by: maru on 2017-11-28, 12:53:43

Where exactly is this "white point" in your image? Could you mark it? I could not spot it.

If you are using some very high or very low values in LightMix, then some issues like persistent noise are expected. See LightMix limitations at https://coronarenderer.freshdesk.com/support/solutions/articles/12000017218

Title: Re: white point problem in the Interactive Lightmix mode
Post by: threedim on 2017-11-28, 13:02:40

Hello! Thank you for your answer. Actually, as you say, it is a "noise" mixed with white points. so is there a chance to eliminate this noise?

thank you!


http://i65.tinypic.com/20i99c4.jpg (http://i65.tinypic.com/20i99c4.jpg)

Title: Re: white point problem in the Interactive Lightmix mode
Post by: threedim on 2017-11-28, 13:05:19

the render has a resolution of 2500 px x 1406 px. worked for a few hours (about three). but it seems that playing with light switches in Interactive Lightmix does not eliminate the problem.

Title: Re: white point problem in the Interactive Lightmix mode
Post by: maru on 2017-11-28, 13:24:06

-after how many passes is this?
-how does your beauty element look?
-how do your lightmix settings look?

Title: Re: white point problem in the Interactive Lightmix mode
Post by: TomG on 2017-11-28, 13:28:00

Be sure denoising is enabled for every LightSelect. (In IR of course, this will have no effect, as denoising can only run in a final render - but same applies for a beauty pass of course).

Be sure every light is assigned to a LightSelect layer, as the "Rest" layer for lights not assigned to a LightSelect cannot be denoised (the only part of LightMix that can't be denoised). Generally if your Beauty looks good, and then when swapping to the LightMix there is noise, most likely denoising was applied to the Beauty, but not to all the Lightselects.

And as Marcin notes, extreme adjustments can introduce noise, especially making any light source brighter - if this is an issue, best solution is to bake the LightMix changes back into the scene.

Title: Re: white point problem in the Interactive Lightmix mode
Post by: threedim on 2017-11-28, 18:56:12

https://ibb.co/hFq2nm (https://ibb.co/hFq2nm)

https://ibb.co/kCE3Sm (https://ibb.co/kCE3Sm)

https://ibb.co/dFx1DR (https://ibb.co/dFx1DR)


here, this is now my situation. I did either reset and reset the render. but it looks like the lights are the problem. they all have the denoiser, but they create this noise.

Title: Re: white point problem in the Interactive Lightmix mode
Post by: threedim on 2017-11-28, 19:01:19

https://ibb.co/kbOf7m (https://ibb.co/kbOf7m)

this is an example to show you that all the lights have activated the denoiser

Title: Re: white point problem in the Interactive Lightmix mode
Post by: threedim on 2017-11-28, 19:05:02

https://ibb.co/fVLA7m (https://ibb.co/fVLA7m)

I also tried to lower this value but the result did not change