The compositor's cryptomatte node has been reworked, now boasting a cleaner and more intuitive interface and workflow.
— di chito architetto ?? (@dichitoarch) March 17, 2021
Where the old cryptomatte node asks the user to manually connect all passes, the new ones lets the user pick either an image or a render layer directly from the drop down menu, which in term loads all relevant passes automatically.
Below is a video showcasing the render layer workflow in the new cryptomatte node by the developer himself Jeroen Bakker:
This redesign also allows the compositor to read Cryptomatte data from images and other render engines:
Get the latest Blender from the link below: