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Speedtree - billboards have no UVs

Hi

I am using UE 4.14.3 and I try to bake lighting on trees. The problem is with lightings on billboards. They are using the same UV as regular mesh. I tried every Lightmap index with no luck. I imported tree directly from Speedtree and through compiler. The UVs are not working correctly with billboards. Any ideas how to make it to work?

Best,
Lucas

Ok, I know where is the problem but I think it is a bug. After importing a tree with billboards, the billboards have unique UV1 for lightmaps. There are not present in the UV1 of LOD1. So after bake, the billboards are having their own UV on top of UV1 baked textures of LOD0.