This page provides information about the Coverage Render Channel in V-Ray for Blender.
Overview
The Coverage Render Channel holds anti-aliasing data based on the Render ID Render Channel. When the Coverage Render Channel is multiplied by the Render ID Render Channel in compositing, it adds anti-aliasing to the Render ID channel, providing a quick object mask.
UI Path: ||V-Ray Node Editor|| > World > Render Channels > Utility > V-Ray Coverage
Properties
Enable Deep Output – Includes this render element in deep images.