Community Shaders is a SKSE core plugin for community-driven advanced graphics modifications.
Tree LOD Lighting
Standard tree LOD has about a dozen limitations. While all of these limitations are addressed by (in some cases enforced) ultra tree LOD, the limited lighting can also to a degree be addressed by the Tree LOD Lighting community shader in case there is a reason to not use the more comprehensive ultra tree LOD with Billboards.
The Tree LOD Lighting mod requires a "complex" tree LOD atlas texture. A "complex" texture means that both the diffuse textures and normal map textures are combined into a single texture.
To generate normal map textures for standard tree LOD billboards with TexGen, set TreeNormalMaps=1 in ..\DynDOLOD\Edit Scripts\DynDOLOD\TexGen_[GAME MODE].INI. Then run TexGen as usual with Tree checked. Install the TexGen output as usual.
To generate "complex" tree LOD atlas textures for standard tree LOD, set TreeLODComplexAtlas=1 in ..\DynDOLOD\Edit Scripts\DynDOLOD\DynDOLOD_[GAME MODE].INI. Then run DynDOLOD as usual with Tree LOD checked. Install the DynDOLOD output as usual.
Note that ultra tree LOD with BillboardX already utilizes HD tree LOD billboards that have normal map textures and typically has better visual results.
When using ultra tree LOD, the standard tree LOD is disabled and the Tree LOD Lighting shader is obviously not affecting anything.