RVT does work on nanite meshes… ive tested it. They just cannot contribute to the final RVT… basically u use non nanite meshes to add to the RVT… the final output material using the RVT is nanite. Im doing this for tesselation.
There is also a check box when you select the mesh to disable nanite and use the fall back mesh. I do this for the duplicate mesh that contributes to the RVT.