The VRayFurSampler is a utility node that provides extra output attributes which can be used when shading V-RayFur. It is added in the same way as standard Maya utility nodes.
This node allows the mapping and gradation (or ramping) of such attributes as color, transparency, and incandescence along the length of each fur strand, as well as randomizing such attributes on a per-strand basis to create complex and custom fur looks.