Issue: Sun glow is visible behind objects (?!)


I don’t understand, I have the glow bleeding from behind a big mountain.
No matter where I move the sun, there is this glow visible in front of everything in the scene as if it was a post-effect, but it’s not, it’s just here in the atmosphere.
It is partially caused by the scattering anisotropy and if I set it to 0%, the glow kind of disappears but is still there as a brighter zone, or “fog”.

Does anyone knows the solution? I use vue 2015

Thank you in advance for helping.