Quite a nice shader, and quite a good render too, thanks.

However, when I google on Marble images, I see strong brightness contrasts in splotchy marbles, or very contrasting veins, while the one presented appears quite soft and cloudy to me. Also, the smoothness as presented is great for bowls but marble walls will be rougher I guess, while floortiles might be a compromise between those.

What adjustments do you suggest to get those nuances in?

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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