Hmm. I put my clutter reduced mesh files into meshes\DynDOLOD\lod\trees but the generated Lod is still the same size even if some meshes were reduced to below half their file size (and probably even more in poly count)...
I didn't do the crc32 and passthru stuff since i mostly followed the "Create Static Tree Meshes Manually" Tutorial which just says "Save the updated empty_lod.nif as [original filename of full model tree]_lod.nif", so I saved my files as treeaspen01_lod.nif for example.
Or is the issue that I simply used the original file and deleted unneeded parts from the mesh instead of pasting into the "emptypassthru_lod.nif" file (there's no "empty_lod.nef" file as in the tutorial), because the pasted BSTriShapes became invisible (maybe a problem when copy pasting from a BSLeafAnimNode to a BSFadeNode? If so, how would I avoid that?)
Or is it that I did not save or use any dedicated lod textures in the textures\lod folder?
BTW, the highest poly count with the full models that I saw for a cell on a quick glance was 5,081,285 triangles. I guess that counts as "not considered usable anymore", right? xD