The simple trick is to remember is that:

• All colored maps should be loaded at GC 2.2 in the advanced material room.
• All Black and white maps should be loaded at GC 1.00 (Transmaps, Bumpmaps, Displacement maps and yes Normal maps)

Then remove all the old style "faking", (mostly that is to remove that light blue in the Diffuse color, and start with a single Infinite light set to 75% intensity inside a Dome)

• Then remember that we are 2016 now => and ALWAYS render with IDL set to ON and at 100%, and GC set to 2.2 in the render settings.