The Multi Matte ID Render Element isolates objects with specific Multi Matte IDs for compositing purposes.
Overview
The Multi Matte ID Render Element provides a mask for individual objects and/or materials based on the Multi Matte IDs.
The Multi Matte ID Render Element contains no shading information at all; it only contains blocks of color that correspond to each Multi Matte ID. It uses the Multi Matte ID option available in the materials' properties.
UI Path: ||V-Ray|| > Render Elements > Multi Matte ID
How to add a render element to a scene
Properties
Multimatte ID Render Element Set up
Here's the workflow for setting up and using the Multi Matte ID Render Element:
Select the material and go to the Options tab. Enable Material Id and set the Multimatte ID to the required value.
Note: each number corresponds to a different color.