Render settings should Always be with IDL and GC ON, and at 2.2

Color maps like diffuse textures loaded with "Render settings" or GC at 2.2

Black and white textures like transparancy, bump, and displacement maps, HAVE to be loaded in the material room at Gamma Correction set at 1.000

Hi there I'm only rendering with IDL,GC 

Color maps are with GC 2.2 and all trans and bump maps are set 1.0

Thanks,Jura