While broadly a ‘good-lookin videogame, sky is pretty lousy at anti-aliasing, so if no strong creative are being lowered by the jagged edge.
Antialiasing method is called Supersampling (or SSAA) while very expensive for best results and sharper image quality of any AA method. For users with older GPU, mod Dynamic Resolution will help users to run the game at a steady FPS without sacrificing fidelity UI by switching to a lower resolution. The benefits of this are different depending on the user’s GPU. For users with a powerful GPU, the resolution enables dynamic downscaling from up to 5 times the original resolution of the user. Mod Dynamic Resolution on Cities Skylines Mods allows modeling with internal resolution is higher (or lower) than the native resolution of the game.