Automatic generation of lightmap UVs (mesh import setting).
In contrast to the lightmap we need far more detail for materials such as grass, mud or stone to look good.
Realtime Only lights are never baked. The Near lightmap set is used within the distance from the camera smaller than the Shadow distance quality setting.
The resolution of the lightmaps in texels per world unit, so a value of 50 and a 10unit by 10unit plane will result in the plane occupying 500x500 pixels in the lightmap.
