I did an in-depth tutorial on Gamma and Exposure correction in Poser and Vue, see the Missing Manuals link in my signature.

In Poser, in most cases, the Gamma Correction after the rendering is an improvement. But it comes with some cons and the Anti Gamma Correction that takes place before rendering comes with some artifacts that can spoil the fun considerably. At least it pays off to be aware.

And indeed, various artists have compensated for the lack of CG-abilities by adding lights and adjusting textures, and are facing "wash out" effects when rerendering their scenes having CG switched on.

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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