I just got my chroma key blue screen material and I've been doing some tests with my wife, who happens to be a redhead.
When compositing in Adobe CS5, no matter how I tweak the blue-screen controls, I still have this slight mottling, or fringing, around her hair. To clean that up, should I do the adjusting in the Chroma Key settings instead of the Blue-Screen settings? Or could it be that when I shot the forground image, and I lit the blue-screen the same as the subject, that I should have lit it a stop brighter or darker than the subject?
Since she is a redhead, and has fine hairs sticking out, what is the best way to create a good matt where there is no edging around those hairs?
BTW, I have to use blue instead of green, for specific reason of my own.
Any help would be appreciated.
Show us a screen grab.
BTW I would usually expose my Blue screen 1 to 2 stops below my FG exposure ( grey scale /skin tone / 18%)
I am always careful to backlight a subject if it is to be keyed.