Quote - hi all,

I'm about to finish and publish some extensive study on GC and TM in Poser, Vue, Post (Photoshop) and alike. In the meanwhile I'm willing to help but I'm not sure any more what the questions are at this stage.

In short: Poserpro - when image GC set to render GC, and ON - is not really applying a net GC to the full image but is sandwiching the linear rendering between gamma decode/encode steps. ...

What do you mean by "net GC" i have never heard that expression? Any information about GC in photoshop would certainly be welcome, as i can find very little about that on the internet.

Quote -   ...

In general: watch your material settings, as the sum of them should not exceed 1 (Diffuse+Specular+Alt_Diff+Alt+Spec+Reflection+...) to represent a net light-receptor. If it does exceed 1 (eg when adding Ambient or taking defaults) it turns the surface into a light emitter, as it's returning more light than it receives. 

Questions welcomed.

I am not sure what that means. Surfaces in poser do not emit light in the way that light sources in poser do, regardless of how large the sum of the material settings is. Light in poser has neither a single model (specular, diffuse, reflections etc), nor does it have a  unit of measurement (like watts). So the sentence "returning more light than it receives" does not make sense to me.