I guess the Poser Reference Manual, accessible via the Help menu (it's a PDF in the Poser program folder)

As said, lighting, materials and rendering are one, and changing renderer requires a redo of lighting and meterials. As far as Poser / Firefly is concerned, you can find something in

http://www.book.artbeeweb.nl/?book=poser-rendering

on lighting and rendering. Concering materials, Reality and Octane, I'll send you a site-mail.

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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