Proplem with shadows after build light

Hi guys,

After Build I have a problem with shadows - shadows with low quality.
In my screenshot i’m using only standart unreal meshes with correct lightmap.
Light quality I checked - “Production”, but nothing changed.
Several objects I put in “LightmassImportanceVolume”, but it doesn solved problem.

Could anybody help, please.

May be I have to change some settings.

I don’t understand why in any video lessons shadows looks perfectly, after migrate mesh in other project and after build shadows looks bad.

Thanks for help

I have solved the problem.

The problem was happand because I’ve changed size of floor.
If you have a problem like mine, know about it.