FelixoMars, thank you for posting that.
I have a bed (static mesh) with 2 materials. The first/top element/material is for the legs of the bed and has no physical material set (it’s default - “none”), and the second element, a “bed_cloth” material, does.
The sound for my default physical material (that I made) plays when the line traces, drawn down from the character’s root, hit the middle of the bed (nowhere near the legs).
So as a test I set both elements, namely the top one, to the same bed cloth material (the one with the phys material I want played), and the cloth material plays.
I was gonna post a question about why, and in the process of constructing a title I found this thread. I never assumed it’d be a collision issue. but in retrospect it makes sense.
Thanks to your post I’ll give it a shot tomorrow.