Bump Roughness for Cycles and Eevee

Pixar RenderMan has a feature called Bump Roughness, which allows small details like scratches on a hard surface to be viewed from any distance from the camera. It would be great if Blender's internal renderers, Cycles and Eevee, also had this feature.

youtube.com/watch graphics.pixar.com/library/BumpRoughness/paper.pdf