How to add Physical Material to a Landscape Layer?

Is it possible to add a Physical Material to a specific layer in a landscape?


I could use clarity as to how this is supposed to work as well. I have a Physical Material assigned to this particular Landscape Layer:


…but when I walk over this painted layer on my landscape, I don’t notice my character slowing down at all (and yes, I did go into the Physical Material asset and mess around with various settings related to Friction, Restitution, and Density to see if SOMETHING would work.

Is there more to it than this?