ArnoldBackground

Assigns a background shader. This is stored as an “ai:background” option in Gaffer’s globals, and translated onto the options.background parameter in Arnold.

user

Container for user-defined plugs. Nodes should never make their own plugs here, so users are free to do as they wish.

out

The processed output scene.

enabled

The on/off state of the node. When it is off, the node outputs the input scene unchanged.

in

The input scene

shader

The shader to be assigned. This will be stored as an option within the scene globals.