https://www.nexusmods.com/newvegas/mods/58562
With the explanation on the Treelod:
To me those aren't problems remotely worrying about. It slows down and it does, I exit and reload. But everything slows the game down after about 20-30 minutes.Unlike previous LODs, DTL files are not meshes, but just a binary data that tells the game what tree type, where to display, and with what scale. File with LST extension defines tree types: width and height in game, and position of a particular tree LOD image on atlas texture. "Atlas" means that there are several separate images located inside a single image. Trees in the distance are just flat images of trees displayed from atlas texture. The usage of single texture in Fallout for all trees is performace friendly, but unfortunately very problematic for mods that change tree models or add new ones. To update LOD images, even if it is only a single tree, the mod must include the whole atlas texture along with images for all other trees even if they are unchanged. The other problem of trees LOD is that a single atlas texture is used for all worldspaces. Also trees in the distance disappear briefly when you approach them, making trees LOD system in Fallout redundant.
Oh for anyone interested, this is what Harold's Wasteland looks like in CW