The Custom AOVs are user-defined AOVs to suit a specific purpose. Although there are many factory preset AOVs in Octane, there is no way to account for all possible AOV needs, so Custom AOVs are available for that purpose. Custom AOVs are just an RGB container that can be used to capture certain aspects of a scene. You can write specific object layer or material masks into custom AOVs and choose whether the mask should be written into all channels or only into the red, green or blue channel. Each Custom AOV has an option to control whether it only records hits of camera/primary rays or if it should also record hits after specular reflections and/or refractions. Specific object layer or material masks can be written into custom AOVs; choose whether the mask should be written into all channels or only into the red, green or blue channel.


Custom AOV - A generic RGB container AOV that can be used for a variety of different purposes. Individual color channels can also be specified. 

Global Texture AOV - Used to apply a texture to the entire scene, including the environment (optionally). Rendered as Info AOVs, the Info AOV settings can be applied to Global Texture AOVs. Alpha channel can be included or replaced with a different texture.