For several days i try to solve problem with black spots on the landscape. I try increse static lighting resotution in landscape details but nothing changed. In this map i use SkyLight and LightSource. This black spots appear in places where there should be no shadows. Take a look at these screens:
The shadow from underneath the mesh is bleeding to the visible areas, you can try increasing the lightmap resolution on the landscape, ideally there would be a hole there so that there isn’t a surface underneath where the mesh is.
You’re right. The shadow from underneath the mesh is bleeding to the visible areas, unfortunately increasing the lightmap resolution on the landscape to 4 nothing changed and building lighting lasted for about an hour.
Actually there is a hole:
Until then the best solution is gentle sculpting the terrain in this dark areas.