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Opening in Nuke

The frames are scene-linear ACEScg. Set Nuke up for ACES once per script:

  1. Open Edit → Project Settings (or press S in the Node Graph) and go to the Color tab.
  2. Set color management to OCIO.
  3. For OCIO config, choose an ACES 1.3 config. The working space becomes scene_linear (ACEScg).
  4. Read the EXRs in, and set the Read node's colorspace to ACEScg.

Don't use nuke-default or Linear Rec.709

Don't use Nuke's legacy colour management (nuke-default) with this footage, and don't convert to Linear Rec.709. Much of the R7's wide gamut falls outside Rec.709 and would be clipped or shifted.

If you chose a different Output colour space on the Advanced tab, set the Read node to match:

Output colour space Read node colorspace
ACEScg (default) ACEScg
Linear, camera primaries Linear CinemaGamut D55
Linear Rec.709 Linear Rec.709 (sRGB)

Linear, camera primaries is only for pipelines that want Cinema Gamut untouched.

For a ProRes .mov, use the same colorspace as the EXRs: it is the same scene-linear image, just clipped above 1.0 (see ProRes).

More detail: Foundry's OCIO Color Management page in the Nuke online help.