Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: romullus on 2016-04-23, 23:19:59

Title: Denoising - very poor performance with Corona lights Vs Sun&Sky
Post by: romullus on 2016-04-23, 23:19:59

I noticed that in one of my scenes denoising delivers very dissapointing results when that scene is lit with Corona lights. OTOH it works perfectly fine when that same scene is lit with Corona sun and sky. Wonder what could be reason for such a difference?

Rendered couple crops as example and made gif alternating denoised vs not denoised versions. Both crops where rendered under same conditions: 100 passes, both took about the same time to render, both have similar brightness, both reached very small noise level - 0,3-0,6%.

Title: Re: Denoising - very poor performance with Corona lights Vs Sun&Sky
Post by: Ondra on 2016-04-23, 23:45:18

the gifs are really low quality, could you post just individual images?

Title: Re: Denoising - very poor performance with Corona lights Vs Sun&Sky
Post by: romullus on 2016-04-24, 09:01:32

Sure, attaching original images. Those crops are very low-res though. I can re-render at bigger resolution or just send whole scene to you if it helps.

Title: Re: Denoising - very poor performance with Corona lights Vs Sun&Sky
Post by: Ondra on 2016-04-24, 11:18:16

ok, please send the scene to mantis. Thanks

Title: Re: Denoising - very poor performance with Corona lights Vs Sun&Sky
Post by: sprayer on 2016-04-26, 10:09:33

for me denoising add more fireflies. would be great if you add to turn on only denoise without removing firefly's for that reason

Title: Re: Denoising - very poor performance with Corona lights Vs Sun&Sky
Post by: romullus on 2016-04-26, 10:13:26

Care to show some examples where denoiser adds fireflies? Curious to see.

Title: Re: Denoising - very poor performance with Corona lights Vs Sun&Sky
Post by: sprayer on 2016-04-26, 10:23:05

Quote from: romullus on 2016-04-26, 10:13:26

Care to show some examples where denoiser adds fireflies? Curious to see.

(http://imagizer.imageshack.com/img924/8489/Tos2gW.png)
it add in full denoise mode. in mode only remove fireflys works better

Title: Re: Denoising - very poor performance with Corona lights Vs Sun&Sky
Post by: Ondra on 2016-04-26, 11:29:23

can you send us the scene? we will be able to fix this if we have it.

Title: Re: Denoising - very poor performance with Corona lights Vs Sun&Sky
Post by: sprayer on 2016-04-26, 14:28:04

Quote from: Ondra on 2016-04-26, 11:29:23

can you send us the scene? we will be able to fix this if we have it.

i am sorry, it was WIP scene and now i can't reproduce it, it is something with denoising algorithm what shades the the area
(http://imagizer.imageshack.com/img923/6172/eKP0TJ.png)
here how it looks now, this scene i can send to you

Title: Re: Denoising - very poor performance with Corona lights Vs Sun&Sky
Post by: sevecek on 2016-04-26, 16:22:39

Quote from: sprayer on 2016-04-26, 14:28:04

i am sorry, it was WIP scene and now i can't reproduce it, it is something with denoising algorithm what shades the the area
(http://imagizer.imageshack.com/img923/6172/eKP0TJ.png)
here how it looks now, this scene i can send to you

Hi,
can you please share this scene? You can use private uploader if you wish.