Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: unicorn on 2023-03-11, 23:16:19

Title: CShading_SourceColor
Post by: unicorn on 2023-03-11, 23:16:19

Hello,

Any help is appreciated.

Is there a way in corona that I can render an element which is the same color as the texture? without any effects. In V-ray I can easily get this via Vray-Diffuse filter.

I Tried using CShading_Source color but the color is different.

Title: Re: CShading_SourceColor
Post by: romullus on 2023-03-12, 10:19:14

Hi,

It's a gamma thing - render elements are displayed in linear and you're comparing it to image with applied gamma curve. You need to save the cshading source element to disk and then compare it to source material. And when i say source material, i mean an image on the disk and not what's displayed in the viewport.

Title: Re: CShading_SourceColor
Post by: pokoy on 2023-03-12, 18:37:58

In Corona the shadig element includes diffuse color plus shading normal while the other one displays diffuse color only. I believe this is a long standing request, not implemented so far.

Title: Re: CShading_SourceColor
Post by: dj_buckley on 2023-03-12, 22:26:41

Yup, logged nearly 2 years ago apparently

https://forum.corona-renderer.com/index.php?topic=33933.msg188214#msg188214

Title: Re: CShading_SourceColor
Post by: unicorn on 2023-05-02, 21:07:40

Hello,
Thanks, romullus I think it's working. It seems that in the frame buffer the color is different but the moment I saved it as .exr and open the file with alpha channel I can get the result that I wanted now.



Thank you.

Title: Re: CShading_SourceColor
Post by: lupaz on 2025-02-07, 16:45:55

Hi all.

I'm not sure I understand what Romullus said.

How do I correct the color of the SourceColor in photoshop so it looks like the actual bitmaps?

See attached please

Title: Re: CShading_SourceColor
Post by: romullus on 2025-02-07, 22:25:24

Don't look at what's displayed in the viewport - it shows wrong colours. You need to save SourceColor element to the disk and then compare. Save it with automatic gamma, not with linear override.

Title: Re: CShading_SourceColor
Post by: lupaz on 2025-02-08, 15:16:57

Quote from: romullus on 2025-02-07, 22:25:24

Don't look at what's displayed in the viewport - it shows wrong colours. You need to save SourceColor element to the disk and then compare. Save it with automatic gamma, not with linear override.

Ah! Yeah. That works.
Thanks.

Title: Re: CShading_SourceColor
Post by: brr on 2025-02-08, 20:20:56

Hi,

Some time ago, I submitted an idea to the Corona Ideas Portal addressing this exact issue. Please vote for it here:

https://chaoscorona.ideas.aha.io/ideas/CMAX-I-25 (https://chaoscorona.ideas.aha.io/ideas/CMAX-I-25)