Thank you, Lobo.

A bit of background: in terms of which computer I do most stuff on, it's my old (2012) Macbook Pro, where I do mostly writing musical sketches and pretty much everything except Blender. I have Poser and Blender loaded on the thing, but it's abyssmally slow and laggy. For Poser I've got an older desktop with Windows 10: that's all I run on Win10. For Blender, I prefer Linux Mint (dual-boot with Win 10). About the only reason I've kept Poser is: posing figures... it does it so well.

I've struggled to rig figures in Blender. Even with Rigify, the steps were just complex enough to where the rig never 'took'. Watching a video today by Pixxo3D on YouTube changed all that: I've actually managed to rig a Poser figure (using Basic Human Metarig) - after around a dozen or so tries - and discovered some interesting things about rigging and parenting Poser figures in Blender.

* 'Doubles' - that is, vertices that occupy the same space as other vertices - will prevent your rig from 'taking' to the figure

* Hair needs to be parented to a bone - not impossible, but that took several tries as well

Quick-n-dirty render:

Posing - such as it is, all done in Blender. I'll have to have a go with the full Rigify rig next so I can pose hands, eyes and expressions.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks