@Fahnenbohn
The solutions is very simple once you know the problem
To fix the Light House Flare just do the following:
1.Open the harbor_kit.dat with S3D
2.Have look for the node: Generic_Light_house
3.Open the Node: Light_House_Flare
4.Go to Particle Generator
5.Have a look for the Bitmap Particles (3 should be there)
6.Open each Bitmap Particle
7.Change the value "DepthTest" -> true
Once you save the harbor_kit.dat the Light House Flare should be fixed and not shine anymore though things. Also land and hills, I think.
Best Regards
Han