QUOTE (NickJB @ Sep 1 2009, 06:45 AM)

So I'd use use it in a similar way to a gray card in the shot and the white balance tool? Maybe process two variations (one for skin, one for background) then mask out in post. Interesting.
Well yes you could do that. But the idea is that you can select a color in one image, of skin tone or anything in the image, and transfer that color to another image.
Shoot a model with a red shirt in a couple of different lighting setups. Open the images together in C1. Go to color/skin color and check the 'Pick to create new' box. Then use the dropper tool that's to the right of the skin tone drop down menu and click on the red shirt in one image. Save the color selection, call it Red Shirt. Select another image with the read shirt, click in the same point on the shirt and match it's red.
It will shift the color balance of the entire image, so yes, you would have to layer and mask two images if all you wanted was to change a skin tone.
Under the Color Editor you have a dropper tool that will let you make selective color changes as well, but not save them as presets.