If you are using Poser 10/PP2014, the latest SR is supposed to automatically correct the gamma for transparency maps. One can also use theChangeGamma script under MaterialMods on the Scripts menu; enter a value of 1.0 for all props and figures and "all of the above"...

Hi WandW I'm using PP2014 with latest SR and those renders has been done in PP2014 and all trans maps have 1.0 what I know and what I've check'd last time when I've done those renders

But on other hand I've tried to postwork those GC renders and looks like adding more contrast will cure this issue,strange

Thanks,Jura