I'm a recent convert to both VSS and gamma correction. I like to use GC'ed materials now because it makes everything look brighter - I've never suffered from the "too bright" problem, quite the opposite. I was used to taking every render into Photoshop, make a new layer and blend that with the Screen blend mode. That made it approximately as bright as I'd intended it to be.

With GC'ed materials, I can (usually) skip that step.

I'm seriously considering buying Poser Pro just for the GC. BUT with GC'ed materials and the remaining option of postwork, I'll most likely wait and see if it MIGHT be a feature of Poser 9 ;) I'd say though that in most cases, Gamma Correction really makes a difference! 

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.