I've got what I was after now. There's probably many different ways to balance things, but reducing light intensity from 0.05 (5%) to 0.02 and changing the edge blend inner color to 192,192,192 (and outer to bright green) look good to me.

I had some problems because my point light was directly in front of her arm. I tried changing various things without success, and eventually side-stepped the problem by simply moving the light!

Once again, thanks for the great tip Connatic!

---

The 3Dcheapskate (also available in DAZ and HiveWire3D flavours) occasionally posts sensible stuff. Usually by accident.
And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU.