See the improvement offered by the new Voronoi modifier, versus the old Fragmenter, in the new update for RayFire.
RayFire Asperity - Promo and Overview
Here is a promo and an overview video for Asperity, a new RayFire feature that adds more detail to geometry.
Max Cookie - Human Skin with VRay
Max Cookie just released a new Citizen tutorial on how to create a realistic human head using 3ds Max and V-Ray.