Multiple Physics materials on 1 terrain tile.

I don’t think you can do this, can anyone officially confirm this?

A work around seems to be, create tiles with different physics materials, and use the entire tile for the physics effect you are looking for, eg sand on 1 tile, rock on the next tile. Not close to ideal, so if anybody has a better idea, please let’s hear it.

Why would I want it? Rock has more bounce than short grass, which in turn has more bounce than sand, etc.