Mark,
What a great quick response.

I printed out that  screen grab image to study---I think I am even more(very thickly) confused!

Stuff shown that is different /contrary to earlier "explanations"?

Do you have the time, using simple models would be enough, to provide a full .car file that one could study?

Could it be an addition to the brilliant "Dark Arts"?

Brian

ps  My question derived from trying to help a thread at the DAZ forum--you have no idea at how frustrated I am at the moment because I am positive I "solved" this once before!

bwtr