gamma = 2.2; it is not turned on, however.  i've never touched that setting.

 

gamma settings in bump/displacement?  uhmm.... no?  there's no gamma settings.  that i can find.  i'm using the ezskin2 'bump blend.'  it's blending... a blender of some math functions (noise), with another math function (looks like 'add 80% to 0%' and comes out white), blended with a fractal blend.

oh, did you think the bump/displacement map was an image?  i don't see any gamma settings anywhere on those, either.  sorry.