The number of settings is quite low considering the options other games offer
Obviously, you get the usual resolution, and windowed/fullscreen options
V-Sync can be turned off completely. There is no hidden FPS cap
Anti-aliasing can be set to "off", "FXAA" , or "Temporal SMAA"—all these options look terrible with heavy aliasing
The options for texture quality, water detail, LOD factor, and shadow quality can be set to "low", "medium", "high", or "very high"
SSAO can be turned on or off
The game is always running a motion blur effect that can be distracting for many, and there is no option to turn it off in-game. You can manually disable it by editing %userprofile%\documents\Square Enix\Just Cause 4\LocalData\local_settings.json and changing GraphicsMotionBlur to 0.