One thing I know of is a set of cvars accessible via console (press ~ to bring it up) for modifying antialiasing settings. There’s a page in the docs that details how the cvars connect to engine scalability settings, and so provides some information on how the cvars (aka console variables) could be utilized. But it’s primarily by inferring or trial/error if not familiar with anti-aliasing.
I’ve found workaround by setting blend mode od material to Translucent. Than find and change (in left panel) responsive AA tick to “true”. It is much smoother