HDR at the best of times is not something I'm very fond of - I can understand the significance of it tactically in a game like ArmA - ie. field of view glare etc. - but IMO it's implementation in ArmA is flawed particularly with respect to NVG usage.
Anyhow, I found I can turn it off by setting HDRprecision=0 in arma.cfg - but somehow the bastard thing keeps being reactivated - I quit the game and go to the .cfg and sure enough it's back at 8
Anyone know what's causing this??