Hello,
I’m using ue4 4.19 with Nvidia flex, I’m trying to achieve a cloth simulation and then rendering it using batch renderer to use the result in After Effect for compositing.
Problem is that my clothes are looking weird, the edges are messed up, it look like there is a moving noise on the edges of the mesh. Plus my material self shadow seems to not render on the whole surface of the mesh and create a kind of lighter halo, making compositing look bad.
So here my setup:
I have a two sided material wich will have a mask on it
I have a plane to put the material on and simulate with flex, we can already see lighter edge
And then the result in render look like this:
Squares look messed up on the edge (I tried differents AA but it didn’t change much), blue ones have a white outline (maybe not related with the previous image) making the all thing difficult to use in compositing 
Hope you’ll have an idea of what’s going on 
Thanks!