Alexander from VRayGuide takes a look at setting white balance for V-Ray renders by putting a grey sphere in the scene that can be used for samples for changing white balance color setting in the V-Ray Physical Camera. Check out the Setting White balance with VRayPhysCam tutorial here.

Alex notes: “Basically this method been used in cinematic industry, they actually put a real (gray) sphere in the middle of the room and take some pictures, latter on it can be used for setting up the 3D environment to match the cinematic footage. Well, I took this idea and implement it with VRay.”