After generating Lod for my worldspace mod Static objects. I realised that it had only generated lod for the vanilla skyrim static object meshes.

The way I done it was like this

click generate static objects lod for Hell worldspace

Then everytime it said a mesh or texture was missing I copied and pasted the corresponding mesh/texture into the correct folder:

meshes: DLC01\LOD\

LOD\

textures: DLC01\LOD\

LOD\

Source textures(TGA): programfiles(x86)\source\TGATextures\

I repeated this process until the CK stopped reporting missing meshes\textures and completed 100% with no errors.

But it hasn't generated or asked for any meshes/textures for my custom statics. i.e copying and renaming castlewall.nif to Hellwall.nif with custom textures.

Is it possible to generate LOD for my custom statics?

If you open the form window for your statics you'll see a "Has LOD" checkbox. The button next to take takes you to a menu showing level 0-3, which are the levels of LOD (0 being nicest/closest, 3 being farthest/worst). You need to point these sections at meshes for whatever level you want to have LOD (smaller objects like rocks and buildings generally only have level 0-1, while massive mountains have all the way up to 3.

Look at random skyrim objects for examples.

You'll want to make low res versions of your custom objects that you want to have LOD. Don't copy the full res version or your world will likely have performance issues for many users. Again, refer to vanilla statics for good standards on LOD quality.

thanks will give a try