@Apple_UK:  Are you using PoserPro or PoserPro 2010 (forgive me if you indeed mentioned it elsewhere and I have forgotten)?  The VSS skin shader template has builtin Gc nodes and will need to be adjusted accordingly if using Poser Pro series.  You would like no Gc in your shaders, so the value must be reset to 1 in 5 separate zones.  I am detecting overbrightness in the eye whites in the Gc renders, indicating to me that there is too much correction being applied.