My X-plane 11 got upgraded to 11.20 yesterday, and right off the bat I noticed far worse quality in my graphics (Nvidia 1070), with ground objects (runways, roads etc.) suddenly "flickering" with jagged edges . Especially noticeable on approaches. After about an hour of testing different settings (disabling all scripts and plugins, trying different AA settings), looking at old screenshots, upgrading video drivers etc. I'm now confident that I'm right.
Cockpit seems to look alright, but objects in a distance does not seem to be "AA:d" like before.
I'm primarily using the AA setting one notch below the highest, and this used to look great on my system. Now it's comparable to hot the second lowest setting used to look.