The Refraction Glossiness Render Element stores refraction information set in 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 the Refraction Glossiness parameter of that material.
Note: To correctly calculate the Refraction Filter Render Element, the Refraction Render Element must also be added to the list of render elements being calculated during the rendering process to properly determine all the refraction information in the scene.
