Still no luck with the alpha values and the CTD.
Besides that, I wanted to add new LODs but can't export them with the right settings, nif skope won't open my new meshes. If I can figure that out, I will add more objects for cars and trains.
I have no idea right now how the global alpha value especially could not ever work with the latest LODGen.exe as long as its defined in the INI. I will have it write the found value to the log with the other settings with the next version.
I could see it not picking up source alpha in case the nif format is off, it should always work for the vanilla LOD models and BGSMs.
You should try vanilla game only, with FO4LODGen.esp and FO4LODGen - Main.ba2