Quote Originally Posted by MrGreenBug
I usually do my WB adjustment too in post-process by adjusting the color temp through the Kelvin scale. I guess I have to get myself a grey card then so I can try this custom WB.

Just to point out, if you get the gray card you don't need to set the Custom WB on the camera. Just take a shot of the gray card in the room sometime during the shoot. Then when you PP, if you're using DPP select Click White Balance, click the eyedropper tool, and click that on the gray card. You can then register that setting (store up to 3) and apply it to subsequent images from the same lighting situation.