Version of Rhino:
Rhino 6 (6.29.20238 or later)
Rhino 7 (7.0.20314 or later)

V-Ray Next for Rhino is much more than a do-it-all smart renderer that creates gorgeous images of your designs. It is also a full suite of tools to help you accomplish more in Rhinoceros than ever before. V-Ray Next makes it easier to manage everything in your scene ? even the crazy complex ones. It is 50% faster overall, with GPU rendering 2x as fast and 7x faster using the Adaptive Dome Light. V-Ray Next for Rhino is compatible with Rhino 5 and 6 on Windows only.

http://www.chaosgroup.com/en/2/vrayforrhino.html