Comping ACEScg renders in Photoshop

[piotrus3333]

The one I named RRT + ODT above, uses the ACES tonemapping

thank you.

[wizlon]

Hi Muhammed, thanks for this tutorial. I'm having trouble getting this to work in Maya 2022 with OCIO ACES 2.0. Could you help? Many thanks. Lee.

[Muhammed_Hamed]

Hello wizlon

Can you explain the issue in more details?
I still use ACES 1.2 with Maya 2022, because not many applications yet adapted OCIO 2.0
So for consistency between different applications I still use ACES 1.2 with an environment variable



Here is a link to ACES 1.2

https://github.com/colour-science/Op...ces-1.2-config

Best,

Muhammed

[wizlon]

Thank you Muhammed. I've also reverted to using 1.2 now. All is working fine now. Thanks again.

[seandunderdale]

Is it worth rendering to ACES if the renders in photoshop will be comped in adobe98 or sRGB, and at 8bit? Im not sure the person who I hand renders to wants to hear about ocio and workflow changes after their 20 years of retouching the same way.

[Muhammed_Hamed]

Is it worth rendering to ACES if the renders in photoshop will be comped in adobe98 or sRGB

Yes, it is worth 100%
Keep in mind that ACES affects lighting and GI, not just the tone-mapping

Im not sure the person who I hand renders to wants to hear about ocio and workflow changes after their 20 years of retouching the same way

You can burn the OCIO adjustment to an 8 bit Jpeg in the frame buffer then give it to him ?
or collapse the stack in Photoshop then send him an 8 bit file

Many places are working this way, but usually the high dynamic range adjustments are done in Nuke or Fusion before being handed to a retoucher

Best,

Muhammed

[seandunderdale]

Ok cool. Burning in my Vray framebuffer corrections is something I do already since they want a simple 8bit workflow, so if this can apply to aces, then thats great.

[Muhammed_Hamed]

Yeah, there is a checkmark for it

[piotrus3333]

small addition to fnord's ocio plugin - two luts merged into one:

https://forums.chaos.com/forum/chaos...er#post1152687

[Muhammed_Hamed]

Thanks for sharing piotrus3333

I will test this today!

[thomas_bussey]

I notice photoshop now has an ACEScg colourspace, is there a way of using that to simplify the method a bit? Couldn't make it work myself.

I guess even if you specify ACEScg on new file creation, if it's 32bit the file should be linear (but with ACEScg primaries?) - and a 'hidden sRGB display transform? Nah, I'm lost... working space of sRGB or ACES doesn't seem to change the need for the 2 LUTs to get the right colour.

[matthew999]

What version of Photoshop is this?

Cheers

Matt

[thomas_bussey]

What version of Photoshop is this?

Cheers

Matt

Version 24.4.0

[shane_mckenzie]

Circling back to this.

How would this work if your in ACES but are using the un-tonemapped view?

[seandunderdale]

"How would this work if your in ACES but are using the un-tonemapped view"

Thats how I work often. I just sling a tonemapper on the stack, and set it to Hejl-Dawson...tone-mapping space to ACEScg...not sure if its technically correct but it seems to work for me. Ill play with the shadow and highlight sliders depending on the scene. Maybe pop the gamma to 0.9-0.95 depending on what I need.