Any good liftgammagain settings?

Title says it all. And btw. how exacly values of this shader works? Can it be used for anything else than darkening/brightering shadows?

This will be highly game dependent, however we can get some basic rules together here. The first line is your shadows, next line is midtones, and last is highlights. Inside each of those are your color channels. I don't tune on a per color channel basis but just overall if certain areas need more darkness on shadows and such.

Anything less that 1.0 will darken, anything higher will become lighter.

Just play around and test, you wont break anything.