This node marks a shader signal for output by the renderer to an AOV (render var). It does not modify the input.
You must set up a corresponding render var in the LOP network (using a Render Vars or Karma Render Settings node) with the same name and type.
Do not use this node as a leaf node. You must pass through the signal you want to use as an AOV.
You must set the Type and Name on this node to match the Source Type and Source Name of the AOV on the Render Vars LOP node, or in the Extra Render Vars section of the Karma Render Settings LOP node.
On the LOP node that creates the render var, set the render var’s Source Type to Raw. You will usually set the Format to
Signature of the input signal, adapts to the input type automatically. This must match the Source Type of the render var on the Render Vars or Karma Render Settings LOP node.