I think I have an idea of what’s going on - in your scene, in the environment and effects dialogue there should be a couple of atmospheres - one of them is PhoenixFD, and the other one is the V-Ray VoulmeGrid’s atmosphere. If you delete the volume grid, it should be okay. We fixed this a while back in both Phoenix and V-Ray. Which V-Ray version do you use? In 3.30 it should be okay.
oh!
we are using in the studio VRay ver 3.20.02.
i have noticed the VolumeGrid Atmosphere. but every time that i delete it, it is automatically being added back