(2022-04-04, 21:00)N. W. Perry Wrote: Yellow slope surface is, however, the same yellow. And yellow rubber is already defined by the !COLOUR meta, so if that is indeed the necessary way to do it, then we can consider rubber to already be solved.
I was just using rubber as an example. Red cloth (which isn't defined) is also a different red from both red rubber and red plastic. My point is that material properties and color are (mostly) inseparable so the solution in place is fine.
As far as surface finish, the only real need for for slope bumps and I support a new META for that.