I need help with shadows

[almicapalmica]

Hello, I am beginner and I would appreciate if someone could explain what is going on with shadows here, why are they looking odd.

Thank you very much, and I'm looking forward to learning in this community.

[Aram Avetisyan]

Hi,

It seems that you have more than one light source (sun or CoronaSun) in the scene.
Just keep one environment light source and the shadows should look fine.

[maru]

Or maybe some of your objects have the "cast shadows" option disabled? (right click > object properties)