Unimesh: not yet indeed, but it seems to be only a question of time, as state here.
Excerpt:

> A key goal for this release has been to simplify content creation for Poser by supporting single-mesh figures that remain in memory and are not broken into smaller segments internally by the software (aka unimesh).  We are still working toward that goal  but, with this release, we are proud to announce the delivery of updated tools for content developers that greatly simplify common tasks such as the creation of conforming clothing for Poser figures.  This focus on tools that streamline content creation will be an on-going theme for Poser development going forward.

𝒫𝒽𝓎𝓁

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