Hi…Thanks a lot for your tips. I forgot to mention that in the end I dont only need to colorize the pullover but also an alpha or luma matte of it. We need this for further processing.
So I think the Resolve / Qualifier thing wouldnt be enough.
@ Steve Bentley is rotoscoping in Mocha really exact enough to catch the hair that is moving over the pullover?
@Cassius Marques You would mask her face+hair+arms? How would you do that? Not by pathing them, I hope! ☺ I also tried that via Levels and Keyscape. The problem is you always have the lights of the pullover also on your matte. And I need either her face+hair+arms as a matte or the pullover. The background and the chair is not so important bevause its easy to mask.