The default Gamma Correction value (2.20) in poser 2010 & 2012 is set up for something called “Linear Workflow”. If you’re using it then the Default Gamma Correction is fine. If you don’t use linear workflow, you should turn it off.
Linear Workflow is simply correcting for the nonlinearity of the display colour space at render time, rather than trying to adjust the materials and lighting. It does require ‘uncorrecting’ non-colour maps, such as transparency and displacement maps, which the ChangeGamma script does….
I was trying to uncorrect the textures. I never thought that the Gamma Correction was messing up the trans map, but that makes absolute sense.
Now, is the correct approach to gamma correct the individual trans maps and create new ones or apply the gamma correction in the nodes of Poser 2012?
Is the value I’m looking for 1/(2.2) = 0.455 ?
Thanks for your help.
OK, it looks like the answers above work so don’t bother answering unless I’m missing something.