Here's a demo with various settings. All are at opacity = 1. The stockings are density = .17, but .67 at the welt and toe. The skirt part of the dress is .5. And the upper part is .3.

(Click for full size as the reduced version is distorted.)

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)