Pumeco - the micro bump you're describing is too micro to do with Poser bump, and it is why the various specular nodes have various ways of describing microscopic roughness, which they then model in a statistical sense.

Blinn, Anisotropic, and KS_Microfacet all do this.

If we were to, instead, model with explicit microfacets, each pixel would have to be sampled around 1000 times.

For actual reflections, the softness parameter also does this, although in a rather hamfisted way.

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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)