Hello!
I’m rigging a character in Harmony 10.3 and, as suggested in the manual, I’m using the Auto-Patch along with Overlay-Layer module to add some better looking folds. Everything works fine, but the problem is that when the Overlay-Layer module AND the drawing itself are connected to the composite, the drawing’s line gets visibly thicker than it should be. It’s only visible in the render view, the OpenGL view looks perfectly fine.
You should contact support to have a look at your rig.