I've taken a close look at both M4 and V4 eyelashes.   A 10 megapixel render of a mid face closeup shows an awful lot.  Including stuff you don't want to see, like displacement.

What I get is that the lashes do not deform when the eyelids are deformed.  So even with stock undialed unmorphed eyelids the lashes still won't fit right in all open/closed positions.  Wonder why they didn't provide deformations for the eyelash baseline?

My 66th Birthday PC Build (July 1, 2020) :  named BadMoonRYZEN!, W10Pro x64, Octal Core RYZEN7 X3700 4.05 GHz, 64GB DDR4 RAM, GeForce RTX 3060 - 12GB GDDR6, PP2014, PP 11, P12, PS-CS4 Extended & Vue 2024.

McG.