The V-Ray Node Editor provides Output nodes for every Node Tree Type: Shader, Object, and World. Output nodes connect the nodes in the Node Editor to the scene. Nodes that are not connected in some way to an Output node are not reflected in the render.

UI Path: ||V-Ray Node Editor|| > Shader > Add > V-Ray Material Output

UI Path: ||V-Ray Node Editor|| > Object > Add > V-Ray Object Output

UI Path: ||V-Ray Node Editor|| > World > Add > V-Ray World Output

V-Ray Material Output

The Output node for the Shader Node Tree. Includes many additional parameters.

V-Ray Object Output

The Output node for the Object Node Tree.                                                                                 

V-Ray World Output

The Output node for the World Node Tree.