Ok, I think this only really works for lighting like that I used in this example. The nodes bb posted to soften the terminator I plugged into the GC and left it at 2.2. But I used an orange colour instead of the grey in the top blender input. I gave the skin colour a slight tint and then plugged this also into the blender. This increases the redness at the line of the terminator which bleeds into the skin. I haven't tested this in lighter settings but I'd guess it might not work so well.

 

PoserPro2014(Sr4), Win7 x64, display units set to inches.

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