Max -
The values you're typing in for Anisotropy and Angle don't do anything. Once you map those channels, the values are taken only from the map.
Having a value for the roughness channel, when it's texture-mapped, LIMITS the influence of the map to that value, like a compressor. If you want the full-range influence of your roughness map, you check Lambert, or set the roughness to 99.
Bump values do influence the material when the channel is mapped, of course. The bump map merely defines the global look of the bump, but the typed value increases or decreases the perceived displacement.
_Mike


- By Andreas Hopf