How to Enable SMAA & FXAA
Follow these simple steps;
-Go to %LOCALAPPDATA%\Slightly Mad Studios\Project CARS 3 and open GraphicsConfigDX11.xml with a notepad.
-Search for and change 0 to 1
-Search for and change 0 to 1, 2, or 3.
-Save and exit.
Enabling this might cause graphical issues and crashes.
Higher values in AntiAlias means better anti-aliasing.