Shading problem in all scenes!

Hi

I am experiencing shading problems for the last few days. I don’t know if it’s a setting but it’s affecting even example levels.

Please help!!

Thank you for your help!!
Kam

sorry it’s not preview version it’s 4.8.0

I don’t have the editor up in front of me at the moment, but if I had to suspect something it would be the shadow bias in the light has been adjusted to a very low value. Try selecting your lights and resetting the shadow bias to the default value.