Here's my problem with the fitting room in one simple picture. The solid mesh is Antonia, the wireframe on top is a sock that I turned into a conforming figure. Both figures have the knee bend JCM manually set to 1 (i.e., without actually bending the knee). It's hard to see here, but the zig-zag on the sock actually goes not only out, but also in, leading to poke-through. This is with the mesh density of the sock matching Antonia's pretty well. It gets much worse when the conformer has a higher density.

-- I'm not mad at you, just Westphalian.