As specularity is not a separate physical phenomenon but just reflection which gets blurred on a rough surface, I am not surprized that it reduces at grazing angles. Did you have a question, anyway?

So all we need now is just another node to plug into the Alt_Specular channel. And perhaps a new Alt_Reflection channel as well. Poser 99? Poserpro 2092?

Or just a physically correct unbiased renderer, like LuxRender?

Now your talking reflections, it might be nice to have some attention for polarisation, which is angle-dependant in a similar way (and definitely a Fresnel thing). The human eye responds vey different to it than a camera, and no 3D renderer addresses it at all.

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Usually I'm wrong. But to be effective and efficient, I don't need to be correct or accurate.

visit www.aRtBeeWeb.nl (works) or Missing Manuals (tutorials & reviews) - both need an update though