weird shadow line edge of displacement

Macanick

L1: Registered
Dec 12, 2016
45
8
sas.png


deleting other face of displacement is not working, displacement itself has no problem
but map makes every displacement (even one that copy from other vmf) looks like this
there's no leak or gap to the void
And by placing multiple displacements in a large space, the frame suddenly gets worse, unlike when it is not.