Shadow bug (weird lines)

On every level I create, I’v got this weird shadow bug, and I can’t fix this. I even didn’t edit any shadows settings or something. But in model viewer (when I open my model via Content Browser) the model is perfectly normal and doesn’t have this bug.

Hi!

To me it looks like Z fighting… are you sure you don’t have duplicated faces? …or the whole mesh?

No, it’s just only one mesh, even landscape have this bug

Good old shadow bias artifacts? Most of time countered with a good normal map or if you prefer polygon look - tweak the shadow bias option in you directional light

if it’s lower then 0.5 you get those banding artifacts, if it’s higher that 1.0 you get a floating shadow bug. Try to fiddle with it to get the results you need.

No, it doesn’t helped. Even without any lighting the bug is still visible. I think it’s probably Z fighting, but I don’t know how to fix it.

Also I noticed that this is happening when I get too far from center of the world