This page provides information about the Refraction Glossiness Render Channel in V-Ray for Blender.
Overview
The Refraction Glossiness Render Channel stores refraction information from a V-Ray material's refraction Glossiness value in the scene. Materials with no refraction values appear as white, while refractive materials represent the value set in that material's Refraction Glossiness parameter.
The amount of refraction glossiness for a material is set by its Refraction Glossiness parameter. For example, V-Ray Material (V-Ray Mtl) has a Refraction Glossiness parameter.
UI Path: ||V-Ray Node Editor|| > World > Render Channels > Advanced > V-Ray Refraction Glossiness

Properties
See the Render Channels page to find out where you can find these properties.
Channel Name – Customizable name for the render channel.
Enable Deep Output – Specifies whether to include this render channel in deep images.
Filtering – Applies an image filter to this channel.