I have missing metadata for generating tree LODs for my several of my trees. One of the reach tree LOD models shows red at the bottom in-game.
Billboards not found confirmed in DynDOLOD_SSE_Tree_LOD.txt:
<TreeReachTree01_DynDOLOD_BASERECORD [TREE:1500D074] Billboard DDS/TXT not found textures\terrain\lodgen\dyndolod.esm\reachtree01_0000d074.dds>
<TreeReachTree02_DynDOLOD_BASERECORD [TREE:1500CFF3] Billboard DDS/TXT not found textures\terrain\lodgen\dyndolod.esm\reachtree02_0000cff3.dds>
Here's more information from DynDOLOD_SSE_Tree_Report.txt:
TreeReachTree01 [TREE:000B8A73] Meshes\landscape\trees\ahappylittletreemod\reachtree01.nif [Original CRC32:4C6F0428] [Patched CRC32:51AF3336] using textures\pbr\landscape\trees\northern hemispheres\reachtree.dds, textures\pbr\landscape\trees\northern hemispheres\reachtree_n.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark_n.dds
New tree, Billboard found, 3D LOD model not found reachtree01_4C6F0428
Billboard_0: textures\terrain\lodgen\skyrim.esm\reachtree01_000b8a73.dds, textures\default_n.dds
Billboard_1: textures\terrain\lodgen\skyrim.esm\reachtree01_000b8a73_1.dds, textures\terrain\lodgen\skyrim.esm\reachtree01_000b8a73_1_n.dds
Billboard_2: textures\terrain\lodgen\skyrim.esm\reachtree01_000b8a73_2.dds, textures\terrain\lodgen\skyrim.esm\reachtree01_000b8a73_2_n.dds
Dynamic: Meshes\landscape\trees\ahappylittletreemod\reachtree01.nif [Patched CRC32:51AF3336] [Original CRC32:4C6F0428] using textures\pbr\landscape\trees\northern hemispheres\reachtree.dds, textures\pbr\landscape\trees\northern hemispheres\reachtree_n.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark_n.dds
Mask: treeFile: C:\Modding\DynDOLOD\Edit Scripts\DynDOLOD\Rules\DynDOLOD_SSE_High.ini
LOD4: Billboard1 using internal
LOD8: Billboard4 using dyndolod_flat_4x2_lod.nif
LOD16: Billboard1 using internal
LOD32: Billboard6 using lodgen_flat_lod.nif
Grid: FarLODReference: Unchanged
TreeReachTree01_DynDOLOD_BASERECORD [TREE:1500D074] Meshes\landscape\trees\ahappylittletreemod\reachtree01.nif [Original CRC32:4C6F0428] [Patched CRC32:51AF3336] using textures\pbr\landscape\trees\northern hemispheres\reachtree.dds, textures\pbr\landscape\trees\northern hemispheres\reachtree_n.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark_n.dds
New tree, Billboard DDS/TXT not found textures\terrain\lodgen\dyndolod.esm\reachtree01_0000d074.dds, 3D LOD model not found reachtree01_4C6F0428
Mask: treeFile: C:\Modding\DynDOLOD\Edit Scripts\DynDOLOD\Rules\DynDOLOD_SSE_High.ini
TreeReachTree02 [TREE:000B8A74] Meshes\landscape\trees\ahappylittletreemod\reachtree02.nif [Original CRC32:21ED4E57] [Patched CRC32:DD01B0C2] using textures\pbr\landscape\trees\northern hemispheres\reachtree.dds, textures\pbr\landscape\trees\northern hemispheres\reachtree_n.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark_n.dds, textures\pbr\landscape\mountains\mountainslab02.dds, textures\pbr\landscape\mountains\mountainslab02_n.dds
New tree, Billboard found, 3D LOD model not found reachtree02_21ED4E57
Billboard_0: textures\terrain\lodgen\skyrim.esm\reachtree02_000b8a74.dds, textures\default_n.dds
Billboard_1: textures\terrain\lodgen\skyrim.esm\reachtree02_000b8a74_1.dds, textures\terrain\lodgen\skyrim.esm\reachtree02_000b8a74_1_n.dds
Billboard_2: textures\terrain\lodgen\skyrim.esm\reachtree02_000b8a74_2.dds, textures\terrain\lodgen\skyrim.esm\reachtree02_000b8a74_2_n.dds
Dynamic: Meshes\landscape\trees\ahappylittletreemod\reachtree02.nif [Patched CRC32:DD01B0C2] [Original CRC32:21ED4E57] using textures\pbr\landscape\trees\northern hemispheres\reachtree.dds, textures\pbr\landscape\trees\northern hemispheres\reachtree_n.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark_n.dds, textures\pbr\landscape\mountains\mountainslab02.dds, textures\pbr\landscape\mountains\mountainslab02_n.dds
Mask: treeFile: C:\Modding\DynDOLOD\Edit Scripts\DynDOLOD\Rules\DynDOLOD_SSE_High.ini
LOD4: Billboard1 using internal
LOD8: Billboard4 using dyndolod_flat_4x2_lod.nif
LOD16: Billboard1 using internal
LOD32: Billboard6 using lodgen_flat_lod.nif
Grid: FarLODReference: Unchanged
TreeReachTree02_DynDOLOD_BASERECORD [TREE:1500CFF3] Meshes\landscape\trees\ahappylittletreemod\reachtree02.nif [Original CRC32:21ED4E57] [Patched CRC32:DD01B0C2] using textures\pbr\landscape\trees\northern hemispheres\reachtree.dds, textures\pbr\landscape\trees\northern hemispheres\reachtree_n.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark.dds, textures\pbr\landscape\trees\northern hemispheres\reachbark_n.dds, textures\pbr\landscape\mountains\mountainslab02.dds, textures\pbr\landscape\mountains\mountainslab02_n.dds
New tree, Billboard DDS/TXT not found textures\terrain\lodgen\dyndolod.esm\reachtree02_0000cff3.dds, 3D LOD model not found reachtree02_21ED4E57
Mask: treeFile: C:\Modding\DynDOLOD\Edit Scripts\DynDOLOD\Rules\DynDOLOD_SSE_High.ini
I'm using Happy Little Trees + Happy Little Trees Add-On - DynDLOD.