How to get only Cryptomatte

[inohide]

Hi,

I want to get only Cryptomatto(Node name) in as short a time as possible. I don't want to re-rendering beauty for time saving.

In Render setting, I turned off Lights and GI. Then I overrode the material with black one. But Edges is juggy in cryptomatte.

When I turned on GI and change to Gray material, I get fine edges. But I needed some time.

What is the minimum required to get the correct Cryptomatte?

Thank you.

[inohide]

I found a solution.

Turn off "Shadows" in Global switches.
Override "simple color (not Black) Material".
Turn off "Enable GI" in Global illumination.

Sorry for wasting your time posting this.