Hi, Mac. I'm not sure to this day just what the Gamma control is supposed to do. Yes, I've read masses of odds about it but they don't give me an in-depth understanding of the aims.
I more or less have to use the NVIDIA settings as opposed to Let Applications Control etc., at least this allows me to slide the control nearly to the left to get rid of the white mist that destroys colour quality.
It's as though I'm running out of slider control, feeling sure it used to be nearer (a logical) 50% setting. I fear one day this milky fog will be there with the control against the bottom stops though so far I have just a little breathing space.
I've gone through the colour settings on several computers and am always left wanting.
I'll post a picture or two later.
In haste.