Ok. It was really a tricky issue, but I've found the problem. The plugin must add some additional information to the raster planes before sending them to MPlay to allow it the ACES color correction. It will be fixed in the next Octane 2020.1 build that will be released shortly.
Thanks for reporting this issue, and sorry for not understand it in your first post!
Thanks,
-Juanjo
ACES workflow
Moderator: juanjgon
Hello Juanjgon
It's look good :

We have differences with resolve and it's necessary to set Highlight compression to 1 for the same result but we love this new fonction.
We still have to work on the workflow but this is very promising.
Best regards,
Benjamin
It's look good :

We have differences with resolve and it's necessary to set Highlight compression to 1 for the same result but we love this new fonction.
We still have to work on the workflow but this is very promising.
Best regards,
Benjamin