Black LOD lines on mountain ranges

Hey, I love this mod but for the love of god cant figure out where these black lines come from.
I use the most recent versions of Iris,DH for 1.20.4

The only other mods I play with are:
Regions Unexplored
Terrablender
2032 World Height

I searched around a little but just cant solve it, if anyone knows a fix I would be grateful.