[Lighting] Dark artefacts on parts of static mesh when baking lights.

[VolumetricDog (Pedro Mameluque)]

@jonimake

You need way more padding between UV islands at that lightmap resolution. Right now the UVs are so tightly packed that lightmass will paint the same texels for different positions of the surface, that’s where the artifacts come from. It checks if spot A on the mesh is in the shade or not. If yes then it paints that texel of the lightmap as black and it solves the position of the texel by using the UV map. Then it checks spot B on the mesh and its not in shade and it paints that spot as white. But since the UVs are so closely packed the UV coordinate resolves into the same texel coordinate as with spot A and you get overlap.

Try overlaying a 128x128 checker texture on your UV map, that way you can see how much space a single lightmap texel will take in the UV map.

Fully agree, I also think that you can also split those closed stripes you have.