Thanks. It does seem that translucence_color is part of the problem. There are also dashed lines connecting to alternate_specular.

It looks better with those removed, but a bit flat. And it seems that was how the hair shades were achieved. The texture map is the same for a variety of reddish shades, and without those nodes all look alike.

Odd that it apparently renders so differently in Poser 10 and below. I did not realize there had been such big changes in Firefly in Poser 11.