Now with a hair node for shading (set to black hair, white highlight). We can see that much of what we think is hair "translucence" or "scattering" is quite ordinary transparency, somehow magically invoked by the hair node, despite there being 0 transparency on the root poser surface node.

You might then start to wonder with a lot of overlapping hairs, all doing some transparency, that this is just as computationally expensive as trans-mapped hair with lots of layers is.

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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)