Hello - that setting only applies to the Rhino renderer as far as I know (Use Lights on Layers that are off ). I’d check with VRay… @Peter.Chaushev - do you have an idea?
You’ve already found the answer. Just want to confirm V-Ray 3 renders hidden lights only when the Asset Editor’s Settings > Switches toggle is used. Rhino 6’s Rendering Properties > Use lights on layers that are off is not taken into account by V-Ray.