SilverwingVFX offers insights into the Render Layer System in Octane under Cinema 4D.
SilverwingfVFX (Raphael Rau) covers an overview of the render layer system in Octane Render. Don’t confuse Render layers with the render passes or multi passes. Render layers can encapsulate AOVs (render passes), but it is a way that you can split objects into renders apart from the rest of the scene.
More on Rendering Outputs in Octane.
This other tutorial from SilverwingfVFX shows how to work with Cryptomattes in a round-trip process from Cinema 4D, Octane, and After Effects.
Crypromatte is a tool that allows you to create ID mattes automatically based on information that is already available in the scene at render time.