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#1 2019-10-31 18:08:30

Narann
Member

EnvLight map: "Linear sRGB" to "Linear ACES".

Hello,

With the following setup:

* ICIO env var sets on official "aces_1.0.3/config.ocio"
* Project Gamma to ACEScg
* Render view to ACES/sRGB

If I use an env light with a HDR map.

By default, the Gamma is sets to "linear", but I was concerned about the primaries:

Am I sure the primaries are properly converted to ACEScg primaries? Or should I use something else?

"Utility -  Linear - sRGB"? "Utility RAW"?

From my tests, "Utility - Linear - sRGB" seems to be the correct one.

Thanks in avance.

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#2 2019-11-05 08:54:13

Ben
Guerilla dev, the guy to hug

Re: EnvLight map: "Linear sRGB" to "Linear ACES".

Hi Narann,

If your HDR is a linear sRGB, then yes, "Utility - Linear - sRGB" will do it properly.
Guerilla 2.2 will soon fully integrate OCIO (texture wise), so it will be easier to set this up.

Ben


Benjamin 'Ben' Legros
Guerilla developer
http://www.guerillarender.com

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#3 2019-11-05 09:00:24

doubleailes
Guerilla dev, the guy to hug

Re: EnvLight map: "Linear sRGB" to "Linear ACES".

Hi Narann,

Sorry for the late answer.

There is huge rework right now ( like tooday ) about OCIO. Guerilla will be natively OCIO and every colorspace will be base on the config.

You are right with an ACES config you should use "Utility -  Linear - sRGB" for linear env map in Linear Gamma and sRGB primaries to convert into the scene_linear space of the OCIO ACES config.

Cheers.

P.


Philippe Llerena

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#4 2019-11-05 09:03:34

doubleailes
Guerilla dev, the guy to hug

Re: EnvLight map: "Linear sRGB" to "Linear ACES".

PS: The boss is too fast.


Philippe Llerena

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#5 2019-11-05 09:09:01

Narann
Member

Re: EnvLight map: "Linear sRGB" to "Linear ACES".

Thanks ! It makes sense.

It’s a good news that Guerrilla jump to the 100 % OCIO, specially for the ACES side.

I will have other questions related to ACES.

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#6 2019-11-05 09:15:40

doubleailes
Guerilla dev, the guy to hug

Re: EnvLight map: "Linear sRGB" to "Linear ACES".

Fire it. We are deep in the subject right now.


Philippe Llerena

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