As a for-instance: I just used whatever default settings I had for shadows...

Ray-trace
SBR: 4
Shadow samples: 19
SMB: .18

Please don't forget... I'm no expert - just gonna mess with it a bit, so:

Ray-trace
SBR: 2
Shadow samples: 60
SMB: .18

Instead of changing the specularity value of the skin from .8 (which in matmatic is just a matter of changing a number in a script and recompiling to mc6s), I decided to leave it and just add a spec light, which is trivial to do: duplicate your existing light, and in the material room set the diffuse colour pure black. Then, set intensity to 40% and turn shadows off for that light. I also took the main light's intensity down from 100% to 92%.

Like I said, just messing. Until you get really comfortable with all the settings - which I most assuredly am NOT! - Poser is really not your quick-image solution. I still find myself taking days over an ordinary scene like this one:

Oh, there's still a lot to do... but you can see change.

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