The following AOV nodes are available in the AOV and Material Node Editors, as shown in the image: 



AOV Output Group node — This node is essentially the same as the Composite AOV Output node, and can be used in the same manner.


Composite AOV Output Layer — This node is automatically created when you add an input or layer to the Composite AOV Output/AOV Output Group node. It connects to the input on the Composite AOV Output node.


Image AOV Output — This node let you add an image directly into an AOV flowgraph. It can specify the color space of the image as either sRGB (the default) or linear, and will output RGBA, RGB or Alpha. The alpha can be premultiplied if the Premultiply toggle is enabled.


Render AOV Output — This node can use any available AOV as an input to the Composite AOV Output Layer node. 


Color AOV Output — This node let you add any color (via a color picker) directly into an AOV flowgraph.


AOV Clamp — This node will take as the input any Render AOV Output node and set the minimum and maximum of the input AOV. It will output RGBA, RGB or Alpha.


AOV Map Range — This node is similar to the AOV Clamp node, but also adds an output minimum and maximum, along with a Clamp toggle, which will clamp the values to the minimum and maximum ranges if enabled. It will output RGBA, RGB and Alpha.


AOV Color Correction — This node will color correct the output of any Render AOV Output node, and thus any AOV referenced by that node. The color correction functions match that of the Color Correction node.


Light Mixer — The Light Mixer node is discussed here.


Render AOV — This node can be set to any supported Render AOV. It can be connected only to available Render AOV pins on the Octane Renderer node.