V-Ray Fur is a very simple procedural fur plugin most commonly used for simulating grass cover or textile fibers.
The fur is generated only during render time and is not actually present in the scene, thus making the viewport faster.
After creating a V-Ray Fur object, a bounding box with a V-Ray Fur icon will appear in the viewport around the selected group or component. And in the render preview you’ll see the fur geometry with its default settings
By applying a material to the group or component, the fur object will absorb the applied material and use that applied material for the Fur.