Colorspace and primaries

Use this forum for general user support and related questions.
Forum rules
Please upload a testscene that allows developers to reproduce the problem, and attach some images.
User avatar
Egert_Kanep
Posts: 237
Joined: Tue Mar 13, 2018 10:34 am

Colorspace and primaries

Post by Egert_Kanep »

Is luxcore using rec709 colorspace, would it be possible to add ocio support to luxcore?
User avatar
Dade
Developer
Developer
Posts: 5672
Joined: Mon Dec 04, 2017 8:36 pm
Location: Italy

Re: Colorspace and primaries

Post by Dade »

Egert_Kanep wrote: Sat Feb 22, 2020 12:47 pm Is luxcore using rec709 colorspace
The answer should be yes because it uses sRGB space that is part of 709.
Egert_Kanep wrote: Sat Feb 22, 2020 12:47 pm would it be possible to add ocio support to luxcore?
It is possible but I think the raw LuxCore outputs is the input of Blender image pipeline so if you have OCIO in Blender it should be applicable to BlendLuxCore too.
Support LuxCoreRender project with salts and bounties
User avatar
Egert_Kanep
Posts: 237
Joined: Tue Mar 13, 2018 10:34 am

Re: Colorspace and primaries

Post by Egert_Kanep »

When we do colorconversion after rendering we are stuck with small srgb gamut then. But would it be possible to have already aces gamut inside luxcore?
User avatar
Dade
Developer
Developer
Posts: 5672
Joined: Mon Dec 04, 2017 8:36 pm
Location: Italy

Re: Colorspace and primaries

Post by Dade »

Egert_Kanep wrote: Sat Feb 22, 2020 2:29 pm When we do colorconversion after rendering we are stuck with small srgb gamut then. But would it be possible to have already aces gamut inside luxcore?
You get out what you throw in: I mean that LuxCore just transports values and uses 32bit floating point resolution for each component so it is more up to Blender/BlendLuxCore as far as I know.
Support LuxCoreRender project with salts and bounties
Fox
Posts: 437
Joined: Sat Mar 31, 2018 11:17 am

Re: Colorspace and primaries

Post by Fox »

What about filmic tonemapping in LuxCoreUi :?:
chafouin
Posts: 120
Joined: Wed Jan 24, 2018 9:35 pm
Location: Los Angeles

Re: Colorspace and primaries

Post by chafouin »

You can use the filmic tonemapping from Blender as well. Color management in Blender works the same way as with Cycles.

But maybe you use LuxCore outside of Blender?
Fox
Posts: 437
Joined: Sat Mar 31, 2018 11:17 am

Re: Colorspace and primaries

Post by Fox »

chafouin wrote: Sat Feb 22, 2020 8:52 pm You can use the filmic tonemapping from Blender as well. Color management in Blender works the same way as with Cycles.

But maybe you use LuxCore outside of Blender?
Yes. but, is there way to load the outside exr file to Blender and apply filmic?
chafouin
Posts: 120
Joined: Wed Jan 24, 2018 9:35 pm
Location: Los Angeles

Re: Colorspace and primaries

Post by chafouin »

You can probably use the filmic ocio config in your compositing software.
https://www.maximeroz.com/filmic-nuke

I haven't tried it personally though.
User avatar
Egert_Kanep
Posts: 237
Joined: Tue Mar 13, 2018 10:34 am

Re: Colorspace and primaries

Post by Egert_Kanep »

@dade

I'd still like to bother you a bit with this colorspace thing. I'm not sure how much work this would be, but maybe at least to consider doing it at some point.

Here is an article about the aces and hkw rec2020 would be better option for rendering colorspace. I do not totally yet understad this particular topic myself, but it seems like using wider gamut is unavoidable if LuxCore would be to keep up with the standards.

Or maybe to start rendering in aces rather than even in rec2020

https://chrisbrejon.com/cg-cinematograp ... comparison
User avatar
Egert_Kanep
Posts: 237
Joined: Tue Mar 13, 2018 10:34 am

Re: Colorspace and primaries

Post by Egert_Kanep »

Better yet to have full support for ocio colormanagment.
Post Reply