While loading ArmA without the addons folder I noticed that
there is a HDR setting in the default UI.
This addon integrates into the standard video options UI.
You can set the value by hand in the ArmA.cfg too though.
* Normal: HDRPrecision=8;
* High: HDRPrecision=16;
* Very high: HDRPrecision=32;
From what I can remember people always used
precision instead of HDRPrecision while editing the ArmA.cfg itself.
It didn't do much tests myself, yet this settings seems to have
a visual effect.
Overview provided by Rainbow!