Realtime shadows look better than baked. I am using Unity 5.2.5f1 personal edition. I made simple scene to show the problem.
Realtime lighting:
Baked lighting:
Is this plane a default terrain?
Select it and go to Lighting > Object and increase the “Scale in Lightmap”
By default the terrain have pretty low scale, because it might get huge. So if you want proper baking you have to increase the scale and set the Advanced Parameter to Default.
Also you might want to set the Atlas Size to 2048, so you have more room for the terrain…
Actually, I made a mistake, problem happens only when I use a terrain.
Plane and cube works fine.
And my project is to big to upload it to forum.