This remapping can be confused with roughness, because linear_roughness = roughness*roughness and lod = sqrt(linear_roughness) so the value of lod is roughness, but conceptually it’s not.
This remapping can be confused with roughness, because linear_roughness = roughness*roughness and lod = sqrt(linear_roughness) so the value of lod is roughness, but conceptually it’s not.