Thank you very much for all your input.  

I didn't disappear, just went back to sleep then got up and went to work.

As my post shows, I'm a lighting neophyte.    It make total sense that later characters designed for improved light rendering are not rendered as intended on earlier versions of Poser.  I'll try what of the suggestions I can in P7 and look forward to reading further discussion.  

My apologies for not posting my settings an example of the material settings of the MATs.