Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: sprayer on 2017-09-17, 19:48:37

Title: VFB saturation produce noise
Post by: sprayer on 2017-09-17, 19:48:37

http://imagizer.imageshack.com/img923/8492/rkIzW0.png
http://imagizer.imageshack.com/img924/5039/syibEB.png
Is this bug? denoise is on

Title: Re: VFB saturation produce noise
Post by: maru on 2017-09-18, 10:14:30

I think this is expected, since any small differences between colors will be exaggerated with boosted saturation.
Actually disabling denoising might help, because "splotches" like this would not appear then. :)

Title: Re: VFB saturation produce noise
Post by: romullus on 2017-09-18, 10:31:40

I noticed that too - saturation is super picky about otherwise invisible noise. Maybe it has something to do with in which order or in which colour space saturation is applied?

Title: Re: VFB saturation produce noise
Post by: Juraj on 2017-09-18, 11:08:45

That definitely looks undesireable.. almost like bug.

Title: Re: VFB saturation produce noise
Post by: sprayer on 2017-09-18, 11:54:54

Quote from: maru on 2017-09-18, 10:14:30

Actually disabling denoising might help, because "splotches" like this would not appear then. :)

Yes i think too what denoise was involved somehow. Also saturation makes darker at shadows as you can see. I was have to change saturation in photoshop.

Title: Re: VFB saturation produce noise
Post by: Ludvik Koutny on 2017-09-18, 13:03:48

It's not expected, it's probably just an order of operations issue. It should be fixable, but the fix could possibly introduce issues somewhere else.