• 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.


  • Create a Custom AOV called crypto_userid.

cryptomatte shader

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


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

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