This page provides information about the Effects Container in V-Ray for Blender.
Overview
The V-Ray Effects Container node allows all other Effects nodes to be applied to the scene. Nodes that are not connected to an input socket of this node are not applied.
Use the 
button to add Effects sockets are remove sockets with the 
button. Sockets which have a node connected to them, cannot be removed. Use the 
box to toggle effects on and off.
UI Path: ||V-Ray Node Editor|| > World > Add > Effects > V-Ray Effects Container
