Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: Amr_mamdoh on 2020-12-28, 10:16:29

Title: Noise Issue
Post by: Amr_mamdoh on 2020-12-28, 10:16:29

Hi there , I have had this problem for a long long time now and I have searched a lot for a solution but nothing worked ,, these white dots always appear in random areas in my renders specially the parts that are exposed to light as you can see (Capture.JPG).
Here are some data to clear the problem more.
Sun intensity = 1
Sun size = 4
Sky=Corona sky
I am using Light mix with the attached values (1.JPG).
I add render elements with the denoise box marked, will attach that too (2.JPG).
and of course I am using corona denoiser , My noise level limit is 8% (nothing changes if its less , only takes more time ) but its not helping with that issue...
If anyone have had that problem before or have a solution for this issue I will appreciate it sooo much.

Title: Re: Noise Issue
Post by: marchik on 2020-12-28, 11:05:32

It is not very good idea to increase intensity of lightmix elements higher than probably 3-5x, just increase intensity of coronasky map itself
and from my point of view the optimal noiselvl is around 3-4%

Title: Re: Noise Issue
Post by: Amr_mamdoh on 2020-12-28, 11:38:47

Its a good tip man , thanks , but it doesn't solve the problem unfortunately..

Title: Re: Noise Issue
Post by: marchik on 2020-12-28, 13:06:36

Quote from: Amr_mamdoh on 2020-12-28, 11:38:47

Its a good tip man , thanks , but it doesn't solve the problem unfortunately..

so you trying to say that without lightmix - in beauty pass only (or with lightmix default 1.0 values) u have this noise too, even after rendering to 3% of noise?

Title: Re: Noise Issue
Post by: Amr_mamdoh on 2020-12-28, 13:46:35

Yes , I think its related to the materials , whenever I use corona material library this happens , and I don't know why m maybe the files are damaged.

Title: Re: Noise Issue
Post by: romullus on 2020-12-28, 14:07:57

It is highly unlikely that the issue is caused by materials from official Corona library. Most of those materials are very simple, just some maps plugged into Corona material, no complex shader setup from countless nodes, besides those materials are tested in production by many users already. Most likely the issue is in your scene itself. Maybe it's incorrect setup, wrong lighting, or even issues with geometry. I would suggest you to open the support ticket and provide the scene for investigation. Just be aware that support is very limited for Holiday season and maybe some short period after it's over, so don't expect quick turnaround.

https://coronarenderer.freshdesk.com/support/tickets/new

Title: Re: Noise Issue
Post by: Amr_mamdoh on 2020-12-30, 19:47:17

Thanks a lot man , appreciate your help.