This is a new tool to convert V-Ray scene to ACEScg: https://youtu.be/ae0XcGLG2RI
With the tool you do not need to download OCIO config to see the result in V-Ray frame buffer.
Saving the final image is also easier as the applied LUT does not require overwriting the
Convert V-Ray scene to ACEScg with a push of a button!
Hmm… Maybe this new tool for converting to ACEScg will cope with this task no worse than the well-known plugin from MAX Tools “V-RayMtl Converter 3”, which can not only do this (and does it perfectly), but also much more ( for less money, by the way).
I’m sure V-RayMtl Converter is a grate tool, but there are a couple of issues that we found when working with ACEScg and recommended workflow:
https://www.avizstudio.com/when-vray-aces-workflow-will-not-work/
In the example above you can see that if you do not convert the base diffuse color of a material when there is not diffuse texture you are getting the wrong color output.
And the most important when you have a complex material and you transform your colors from sRGB to ACEScg in the first VRay bitmap/color node you also may get very different colors then expected.