Help with GPU settings 680L GTX

Hello all. I love this sim and looking forward to support the series I started with A10C On steam sale and I must say I'm very surprised. The sim is demanding and complex beside that look at this wonderful community. As a new guy I just started to work on my joystick profile thanks to this forum and I'm practicing over and over some practice missions.

Back to main question I play on 1200p every thing seam to be at high but looking at some other screens and videos I got a feeling that many players have better image texture ... Quality.... Or something

Can someone could help me max out this sim ? I have a lot of gpu power and I got a feeling like I miss something

One of the things is HDR but there is many to pick from please help me max my experience with this wonderful sim. I appreciate it.:)

EDIT I'm not sure what was wrong with my question ... HDR seam to make the game look better.