Check out a quick guide to using Cryptomattes inside Fusion 9 by Helge Maus.

Check out a quick guide to using Cryptomattes inside Fusion 9 by Helge Maus. The tutorial covers the installation process as well as using Cryptomattes to pull masks for compositing. 

In this tutorial, 3D & VFX Trainer Helge Maus gives you a brief introduction for using Cryptomattes inside of BlackmagicDesign Fusion 9 and Fusion 9 Studio. He shows how to install the Cryptomatte Tool inside of Fusion with the help of the brilliant Reactor Plugin and how to use Cryptomattes to pull masks on the fly for compositing.

Reactor Plugin for Fusion

Introduction for Cryptomatte (Houdini): 

Helge Maus 

Make sure to discuss the guide in the comments below.