Why do I have light leaks?

I get sunlight leaks in seemingly random corners of rooms. Sometimes, point lights shine through walls to varying degrees. Leaks happen with dynamic and static lighting. Leaks happen with production value lighting and a lowered static lighting level. They occur with static and brush meshes. It doesn’t matter if the mesh uses 2 sided lighting. I haven’t tried shadow bias. That’s because I can’t find the setting in the documentation. I just find an example.

Typically, it occurs due to insufficient lightmap resolution, improper lightmap UV layour, or not tightly fitting meshes. This guide should be good place to start.

Thank you. I fixed it.

excuse me ,can you tell me how to fix it?