Below is an example of a basic scene used to demonstrate the usage of user Cryptomatte AOVs.

• User Data (named userid ) is applied to each object that is required a user AOV. You can define any custom name for the objects in the userid parameter, they are used as the IDs in the custom user AOV.

_{Object2 custom name used in userid User Data for Cube}

• Create a Custom AOV called crypto_userid.

_{crypto_userid custom AOV}

• Create a cryptomatte shader and under AOV name, enter crypto_userid.
• Set userid as the Source User Data in the shader.

_{Cryptomatte shader with crypto_userid AOV name and userid as Source User Data}

• Render the scene. You should be able to view the crypto_userid AOV.