Blender 3.1 sort-of's got me doing the "kid-in-the-lollie-shop" thing these days... forgot just how much fun this was. Blender development is simply in a class on its own. I'm a Musescore user: which is a freeware competitor to music notation software costing hundreds of dollars like Sibelius and Finale and even Dorico... their development of Musescore 4 is incredible, but even it doesn't hold a candle to where Blender has gone.

So, I'm pretty happy with posing figures in Poser. Rendering? not so much. And the cloth-room, er, yeah, not crasy about that either. But POSING is so easy... so I pose my figures in Poser, export to OBJ and then use this awesome (new-to-me-at-least) feature in the Oject Data Properties area... again, it's that little dropdown under the add/delete + and - thing. Workflow is as follows:

* Pose your figure in Poser

* Export as OBJ (your posed figure and the one in Blender must be identical in terms of vertex count or this will not work)

* Import OBJ into Blender (scale up x10, the Object -> Apply -> Scale - which I always do with imported figures from Poser)

* Select the figure that is to receive the pose - customarily in a T-pose at this point

* In the Oject Data Properties area (with the little green flux-capacitor icon), in the Shape Key section select the [ + ] ... it will give you a new shape key entry called "basis"

* Import your posed obj, doing the whole scale x10, Object -> Apply -> Scale thing. Not sure it is strictly necessary, but always good to have like with like

* Select the posed figure FIRST

* Hold down the shift key and select the T-posed figure that is to receive the pose NEXT

* Back in the Oject Data Properties area, click the down arrow and select "Join as Shapes" - the name of the second figure will appear as a shape key

* Delete the posed figure - it has served its purpose

* Select the Shape Key (under "basis") and set the Value to 1

Done!

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