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Photoshop v25 OCIO is this correct behaviour ?

Participant ,
Oct 17, 2024 Oct 17, 2024

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Hi all

very pleased to see the new OCIO features built into the latest Photoshop release. I use OCIO in my 3d app working and rendering to ACEScg output. Pulling in the .exr file shows perfect colour matching looks all correct. However I have the following issue which I'm not sure why is happening if I add an sRGB image Layer to the same project...

 

If the document working space is set to ACEScg the .exr render looks correct with the Properties Panel  view set to  Aces 1.0 SDR, however the 8bit sRGB file is getting tonemapped. If I set the View to un-tonemapped the 8Bit file looks correct but the .exr is incorrect. So far this makes sense to me. I tried adding an OpenColor IO Adjustment Layer to compensate, looking for an ODT to correct out the tonemapping but couldn't find anything there to compensate. I've only got a need to know knowledge on ACES so maybe I'm missing some key knowledge here, so any help would be much appreciated. Would be very useful to have this working as I can comp in some sRGB content post render etc if required

 

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correct answers 1 Correct answer

Participant , Oct 17, 2024 Oct 17, 2024

Solved, but I thought I'd leave this here in case anyone needs a solution ...

Requires 2 OpenColorIO Adjustment Layers:

1st Layer set to:

  • OpenColor Display Transform
  • View: Un-tone-mapped
  • Display : sRGB/your display

2nd set to:

  • View: Aces1.0 - SDR Video
  • Display: sRGB/your display
  • Invert checked to reverse transformation

 

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Participant ,
Oct 17, 2024 Oct 17, 2024

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Solved, but I thought I'd leave this here in case anyone needs a solution ...

Requires 2 OpenColorIO Adjustment Layers:

1st Layer set to:

  • OpenColor Display Transform
  • View: Un-tone-mapped
  • Display : sRGB/your display

2nd set to:

  • View: Aces1.0 - SDR Video
  • Display: sRGB/your display
  • Invert checked to reverse transformation

 

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Participant ,
Oct 17, 2024 Oct 17, 2024

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* document working space is ACEScg with View set to Aces 1.0 SDR

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