Apparently it’s not possible to use the viewport renderer when working with redshift materials? I use to do this in Octane and it worked fine. As you can see from the attached screen grab, the viewport itself looks great, the viewport render is just black. The node space is set to Redshift. When I switch it to Standard/Physical the actual viewport does go black (the materials that is). Perhaps if I were using the xpresso based node editor that might have worked?
I really like the look and speed of a viewport render for roughing out an AE timeline with VO. Oh well, I know its early days for Redshift integration.
https://drive.google.com/file/d/1FdvPofTVg7A2tdNci98aeL7jtzFs_HLX/view?usp=sharing