Ok thanks for reply good to know, and I didn't use his pre-generated LODs I just used his settings for xLODgen and generated my own. I ran tex gen and dyndolod and made sure to unitick the Tamriel resource while doing so. I used biggieboss's guide and his pinned comment says to add the "mountain" in Mesh Rule in advanced section of dyndolod and I did that so I must have messed up in text gen maybe?
https://imgbox.com/Ej9eNka4 Don't know what caused this but it affected all of my mountains, they look fine up close but really messed up at distance. I used Perfect Terrain Lod - Vanaheimr AIO - Tomato's landscapes - Full Easy Guide at Skyrim Special Edition Nexus - Mods and Community ( His xLodgen settings are at bootom of page for all levels)