I wasn't going to nag.

But I *do* win my bet (in another thread on another site): I knew it had to be Metal. After all, it was brutal for the Blender team.  So it would have to be an order of magnitude more brutal for the Poser team (older code base and a fraction of the devs).

I have 18 Xeon cores, 128GB RAM, with a Radeon Vega Pro 64 16GB waiting to take Poser 13 out for a serious drive.  As it is, Blender is so fast I find a finished render on my computer before I even touch the keyboard to start making the scene.  Makes it easy: I just make the scene look like what it should to generate the render I already have.  Laws of physics, be damned!

I could help test (I've tested Poser way back in the Cooper Age).  I have heaps of time.  I code.  Intel Macs (MBP, iMac Pro)