So I found a way to reliably perform a wall clip that people will occasionally encounter during runs. It involves running against a wall. (with a corner) and then as you round the corner dash back into the wall. This will clip you inside the wall and allow you to move through other walls. But try to stay close to the wall you breach because most of the buildings you can clip into don't have a floor to stand on in their center. Here is a vid I made on how to do it. Skip to about 0:50 (That's where I explain it/demonstrate it)

Hmm... I'm thinking there could be some interesting uses here for Chapter 4 with pushing spawns to far away zones. I'm just not sure how you'd up, since that whole area is recessed and it looks like you are likely going to clip through the stairs. Would be something interesting to try out though.

I’ve been trying to find an area where I can clip back out there but I haven’t had any success yet