Hello,
I have been having this problem for many years on current PC and all this time I dismissed it as the way RV engine renders graphics. I've had it in OFP, Arma 1, Arma 2 and now Arma 3. I always thought this is some legacy problem that all RV games have since I don't have this kind of glitch on other games. So now I decided to check with other people and it turns out I'm the only one experiencing Arma in this ugly way :D
During evening, night or early morning the sky has all kinds of spots and stripes with washed out colors.
I've had same issue after reformating entire HDD and reinstalling OS, drivers and Arma 3. I've changed every single setting in control panel and Arma (from lowest to Ultra). Changed brightness and gamma both in Arma 3 and OS/monitor. While lowering Gamma makes it less visible I can still see it.
I have a feeling this is a GPU issue and I'm afraid it's unfixable but perhaps someone knows exactly what this is and maybe there's a way to fix it.
Thank you
Specs:
CPU:Q9400 @ 3 GHz
GPU: GTX 285 1GB
RAM: 4 GB DDR2 800 MHz
700W PSU
7200RPM 1TB HDD
Operation Flashpoint has a simiral issue but maybe it's just the default graphical fidelity of the old game. In Arma 2 it was much more visible.