Updated: 24.01.2017
1. Download and Start ReShade Setup
http://www.mcgeek.de/files/tools/sfx/ReShade_Setup_3.0.6.exe
2. Select ace.exe in the GameFolder
"..:\Steam\steamapps\common\War Thunder\win64\aces.exe"
3. Question: Select rendering API - choose Direct3D 10+
4. Question: Do you wish a Collection of standard effects - Press: No!
5. Download Preset-Files and extract into GameFolder (2)
http://www.mcgeek.de/files/tools/sfx/SweetFX_for_ReShade_WarThunder.zip
It's way too dark.
Comparison Video in Description