Any way to assign "material attribute name" & query filter for meshes per triangle?


PhysX can assign PxMaterial to PxTriangleMesh & PxHeightField per triangle.
But I want to assign “material attribute name”, which can be a string like “wood” or “stone” or an ID to meshes per triangle.
The “material attribute name” makes no sense for PhysX but only for game application. So I think maybe I can assign it in DCC tool but I have no idea how to insert it to a PhysX mesh.
And for query filter, I have similar problem.

Thanks for any help.