I presume you are using V-Ray GPU. We are aware of the missing element; the issue is already logged (internal bug-tracker id: VGPU-4927) for developer investigation. The current workaround is adding the element through V-Ray CPU.
Oh, interesting. I did not realize the list changed based on the currently selected renderer. Thanks for the work around. I will check it out.
The same happens when selecting maps and materials, too.
Yeah, I saw that, which is probably a good thing. I also saw things like translucency disabled in VRayMtl with GPU active. I kind wish there were some kind of note there (Does not work with GPU). Maybe a popup when you roll over it? I dunno. That one confused me for like 15 sec before I figure it out.
Hopefully soon GPU and CPU will all be the same 