[4.9.2] Ugly shadows

My shadows in UE 4.9.2 look very bad. I’m a beginner and I don’t know what the problem could be. I use only a directional light from the default level. I’m adding screenshots of the problem and my settings.

You need to increase the lightmap resolution of the floor mesh. Check out this Wiki for more in-depth explanation on lighting: A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums