Shadow problem on the edge of model

Could someone, explain me, what have I done wrong?
The shadow is ok in the middle of mesh, but where mesh ends the shadow is broken [Img#1, Img#2].

I thought that my models are broken, or uvw is some kind wrong,
But when I used model created by epic (from demo project) the situation is the same [Img#3].

I could attach my (fbx file) or (scene files) if it will be needed.

Scene configuration:

  • Atmospheric Fog
  • Directional Light
  • Sky Ligth
  • Material: Standard White(1,1,1,1), Roughness and Metalic set to 0




I think you need a higher lightmap value for the floor.

Making light map resolution to 512 fixed the problem. Thank you.