Weird shadow on objects

Hi,

I’m having a trouble with shadows cast by directional light on objects on my scene. They appear flat, there are gaps between objects and the shadow, I don’t know what to do.
Tinkering with quality settings doesn’t help at all.

I put it on a video: - YouTube

Have you checked what light sources there are, and messed around with the angles of them? Try things like rotating the light so that it is pointing directly down.