Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] General Discussion => Topic started by: klyde on 2013-12-18, 17:59:38

Title: Noise in shadows
Post by: klyde on 2013-12-18, 17:59:38

Hello!

When I'm using bright colors there is too much noise in shadows. It's not going away even after 80 passes (1:30:00)

In condition of white color it goes away much faster 30-40 passes

PTS 32 MSI 20

Title: Re: Noise in shadows
Post by: Polymax on 2013-12-18, 18:12:14

and albedo? Do you use it?

Title: Re: Noise in shadows
Post by: skinny_santa on 2013-12-18, 18:30:06

try using HD cache + 8-12 pts
and reflection value ? is it too high ?

Title: Re: Noise in shadows
Post by: klyde on 2013-12-18, 18:50:22

Thank you, guys. I tried but have no success. Here the scene, even without textures it has awful noise in shadows.

Title: Re: Noise in shadows
Post by: Polymax on 2013-12-18, 19:06:42

HDCache bad working on crop or region. You need test it in "view' mode

Title: Re: Noise in shadows
Post by: Juraj on 2013-12-19, 04:24:24

Quote from: Polymax on 2013-12-18, 19:06:42

HDCache bad working on crop or region. You need test it in "view' mode

Really ? Is this some bug or something ? Because I wondered why the "crop" renders sometimes shut down my 3dsMax during HD or before, but never anytime else.

Title: Re: Noise in shadows
Post by: klyde on 2013-12-19, 05:41:18

Tests in view mode.

Title: Re: Noise in shadows
Post by: skinny_santa on 2013-12-19, 06:18:34

what is your light source ?

Title: Re: Noise in shadows
Post by: klyde on 2013-12-19, 07:12:49

Sky + Sun + Portal

Title: Re: Noise in shadows
Post by: klyde on 2013-12-19, 07:28:41

Tried to lower MSI (to 2). It solved the problem particulary.

Title: Re: Noise in shadows
Post by: klyde on 2013-12-19, 09:27:50

Lowering sun intensity to 0.2 and MSI to 10 helped a lot.

5.jpg - MSI 40 Sun 1.0
7.jpg - MSI 10 Sun 0.2

Title: Re: Noise in shadows
Post by: Ludvik Koutny on 2013-12-19, 10:00:14

Decreasing sun intensity is not an acceptable workaround as it changes way your image looks too much. My suggestion is to revert ALL of the settings at their defaults. ALL of them. Then set secondary GI to HDcache, increase PT samples to something like 32, Increase light samples multiplier to something like 6, and make sure there is no glass in your windows that has refraction mode set to solid.

Title: Re: Noise in shadows
Post by: klyde on 2013-12-19, 16:36:10

Everything was reseted.
Tests in room and without room

Title: Re: Noise in shadows
Post by: klyde on 2013-12-20, 11:12:52

Comparison VRay vs Corona