In a quiet minute, i restarted that GC theme, tried to make it easy. So PP2010, linear rendering, GC On:, GC correction of incoming texture maps, GC correction again immediatly after the redering. so fine so good.

I try to show what i mean with  "washed out".
The inlcuded Pic based on a szene with V3, some cloth BB's Fullbody Lights (NO VSS Prop used)
Above Picture : GC in Rendersettings OFF
Lower Picture : GC in Rendersettings 2.2
To much lights ?, well i tried Reducing the lights a lot, but it doenst matter what i do to the lights
the result looks always better with GC in Renderesetting off.

Loosing of details with GC on, could be avoided, by GC Settig of 1 for Displacment and Normal
Maps via manual correction (Texture Manager) or the changegamma script.
But this alone wont solve my problem.

My best results in other szenes are with:
GC in Rendersettings off, Using VSS_PR3_NoAO, or VSS_PR3_AO depending
on usage of AO via Lights or via VSS. (GC Values unchanged in the VSS Prop, means 2.2)