vRay nodes do not show up in Nuke 11.1v2 even though it installs.
However they do show up in 11.0v2
Hello,
You will need a build for Nuke 11.1 as they are different from the ones for Nuke 11.0.
You can find such a build only in the nightlies section for now, but really soon there will be an official 11.1 support as well.
In order to get a nightly build you can contact support@chaosgroup.com and they will help you out.