overhang artifact or so, idk what is going on :I

I recently started learning creative building with Axiom on 1.21.1 with a bunch of mods, Distant Horizons included. when making my tree I kept noticing these long lines connecting to the ground from the leaves (diamond for masking it). the only mod I can think of doing this is DH, anyone know what is going on?

Solution:

Try increasing vertical quality or disabling cave culling

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