If getting low FPS / stutters, take a look at what each post process feature does and pick what you like best instead of relying on what the developers think is best for everyone. Each postprocess effect has an impact on the GPU while not making the game better looking but rather applying an instagram-like filter in my opinion. Some even make the game look worse with more pixelated clouds & buildings.
Check that link from Unity engine to see with pictures what each does:
When you’re set on what you like the best, edit the UsrCfg.opt (graphic configuration file for MFS) located in the LocalCache directory with Notepad or alike. Use windows search to find the file if needed.
Check the PostProcess section with EyeAdaptation ColorGrading and so on. Each matches a post process effect you can check on the unity doc link above. Ambient Occlusion, Bloom & Motion Blur have their own section.
Be aware if you change any graphic setting in game, the UsrCfg.opt file PostProcess section will be reverted back to the default.
About Sharpen post process: it’s apparently mostly useful to improve rendering scale lower than 100% and attempt to mimic the original image. If using 100% rendering scale or more, there shouldn’t be any use of sharpen since your screen gets the original image but you can try both ON (1) and OFF (0) to see what’s best for you.
I found the settings below to give me more fps, less lag/stutters when going below 30fps and to be the most reality-like instead of seen through a camera lens or showing dramatic effect. If that improves your fps sufficiently, rather push more important settings higher like clouds, light, level of detail than these postprocess.
Note I’ve tested with a GTX but I doubt the RTX cards postprocess differently.
{SSAO
Enabled 0
Quality 0
}
{Bloom
Enabled 0
Quality 2
}
{MotionBlur
Enabled 0
Quality 3
}
{PostProcess
Enabled 1
EyeAdaptation 1
ColorGrading 0
Sharpen 0
Fringe 0
LensDistortion 0
Dirt 0
LensFlare 0
FilmGrain 0
Vignette 0
LensBlurMultiplier 1.000000
FringeMultiplier 1.000000
}
Each effect can be turned ON with a value of 1 or turned OFF with a value of 0 next to them.