There seems to be a bug that disabled subdivision applying on models.
In the materials tab, on the root of a figure you can apply subdivision (Subd Level/Sharpness).
Maybe I'm doing something wrong or something has changed with one of the more recent versions, but I'm pretty sure in the past I was able to just say "Subd Level: 2" for example, and it'd apply subdivision on the model accordingly.
But now entering anything in the Subd Level/Sharpness fields just results in the render window opening (or saying it's already open). But the values in the Subd Level/Sharpness fields revert automatically back to 0. No subdivision is applied.
Using Poser 12.0.1029 and Octane plugin 2022.1.0.119