Hello jomallord,
I didn’t understand everything that you explain but I think there is some confusions on your side.
If i get right you have a texture coming from RealityCapture that you wish to conform to the ACES workflow ?
As we can assume that RealityCapture is generating a sRGB image I think that you will not benefit much to convert your texture to the ACES workflow (anyone correct me on this one if I am wrong). It will just allow you to use them in an ACES workflow if you are working with ACEScg texture in your 3d software.
Then the how-to:
With OCIO set in Nuke:
-
With the screenshot you posted it seems that you exported a 8/16bit tiff (or a 32bit tiff with the sRGB transfer function ?) so it is correct to use Utility-sRGB-Texture on your Read node. This will convert the input to the working space which is ACEScg.
-
You don’t need to do anything more to work with your texture, but now if you want to export it :
On the write node choose ACEScg to export for your DCC, with of course the exr file format.
You could choose Output-sRGB only if you wish to create a preview thumbnail.(exported in a integer format like jpg,png,…)