Here I've adjusted the specular settings and put the bump back in the way the original shader came in the P6 library. The lights are the same as before. This looks more natural. If you don't want the leather to be shiny, you can lower the Specular_Value even more. Adjusting the Highlight_Size up or down will significantly change how the specular reflections are reacting to the bump map.

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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)