CID

This addon is focused on Material and Object ID Render Passes. It works like a selection tool for post-production.

CID stands for Color IDs. CID is used to easily generate Color IDs and Object IDs Render Passes (also known as ID channels/elements/masks). This output is often used as a cornerstone for creating postproduction for other software.

How does it work?
The output is generated in the internal blender compositor as a Render pass.
Each material and object is assigned a random index number.
The colors in the compositor correspond to the given numbers.