Regarding black spot over landscape

hello,
I am working on a scamll game project.
however I am facing a weird problem og black spots on my landscape edges…
I have triend almost everything for the solution…
changed my first layer to alpha…
changed foliage to movable…
changed light to static./…
add distance field…
repaint terrianj…but could not find a solution…hope I get a help

reply on this question I will post pictures if you need them…

Picture please :slight_smile: