After fighting with LOD for hours I finally managed to do it, but now I have annoying problem. I have these black lines on Landscape LOD textures.

http://cloud.steampowered.com/ugc/900982387468702778/7920C135CC1BD7BFB82442618F9AA9E7D671FF32/

I tried using Oscape but them generated files don't seem to work, so I had to use Creation Kit's Generate LOD.
How do I fix this black lines?