I am having so much fun learning the UE. I am having an issue. If you look at the posted image you can see the shadows on the grass are awfull. I ran the build lighting and even bumped up the LOD resolution to 264 and it still looks the same. Any help would be greatly appreciated.
I would use landscape instead of a big mesh for the ground. Much easier to manage lightmap resolution.
Also, use cascaded shadow maps. The setting can be found on the directional light.