Having a seperate slider for the illumination would definately be a plus. But I agree with morne and undersky even if not physcally correct sometimes clients just want those rays and not the side effects of those. Thats why I proposed in the vray 3.0 forum being able to produce those rays per lightsource without the darkening of the scene through fog. Like you are able in Arnold.
Vlado already mentioned that there might be a problem with the way MAX would handle this scenario and he is the person with the understanding of the technology. I’m just happy that vray provides me with pretty pictures 