Old network
As of Houdini 20.5, use Copernicus nodes instead of Compositing nodes. Though both networks still exist, the Compositing network is now designated as COP Network - Old. The Compositing network and its nodes will be deprecated and then removed in a future Houdini release.
This node is identical to the 
Composite ROP. Instead of
referencing a COP to render from within the render output network, you
can use this node in the COP network and simply connect the COP you want
to render to its input.
