I wanted to mimic the solo node in c4d.
As always I made a frankenstein style script but it works ( at your own risk )
I made a macroscript you'll find in "yoko" category ( I bind it to ctrl+alt+s key as I don't use incremential save )
Just select the node you want to isolate, run the script.
If your octane viewer is opend you can see the node ( map or noise or...) on your object
You can refine your setting then click EXIT.
If anybody can enhance the script he is welcome
Better not to have Quick update mode on.