GECK Landscape editor causing the landscape in game to be glitched(?)

[Delim33]

In the GECK I flattened a lot of the landscape around Camp Guardian Parking Lot to make it bigger and add the building. In the editor it looks fine but in game low quality versions of the ground that used to be there appear overtop the new landscape

[madmongo]

You need to regenerate LOD.

[Delim33]

1 hour ago, madmongo said:

You need to regenerate LOD.

Does that mean generating the terrain meshes again through GECK or something else. I looked on the wiki for regenerating but there's no file I could find that has LOD data in it if that makes any sense

[madmongo]

I use the GECK to generate the terrain meshes then FNVLODGen for the rest.