Hi all, I work primarily as a 3d designer and im trying to understand how to correctly measure white balance and apply WB correction in photoshop. 3D renders typicaly render with no WB applyed, its my understanding that old style cameras has no built in WB and you could mesure the WB by using white or gray cards. Im not 100% sure but this same princible can be applyed to 3d renders. But unfrtunalty i dont really understand how the gray cards are used......so, can somone give me an idea how to use them!? cheers!