Keylight 2.0 Issues in FCP

Question

Hi There,
I am struggling with green screen using keylight 2.0 in FCP.
Screen shot of the details:
www.golfsurvivalguide.com/Keylight_Issue.jpg
I cannot get a clean status view. I am getting green deposits in the white area that are showing in the final result as a shimmering black shirt with black spots on my teeth. I have read and reread the Foundry tutorials. My screen matte looks good and the green screen is pretty even so doesn't seem like this should be a difficult key.
Any advice would be greatly appreciated.
Christina

Answer 1

I'm pasting in my workflow from an older AE forum post (sorry, too busy to write this out from scratch - hope it helps:))
+Duplicate the layer and apply Keylight to both. One for a Core Matte and one for an Edge Matte. Both are set to Combined Matte, with the top layer's (core) Transfer Mode set to Add. These two are precomposed and set as a Luma Matte for the unkeyed original layer.+
+For the Core Matte, in the Screen Matte controls, crank down the Clip Black and Clip White controls until all the green is gone from around the subject, and the body is fully matted with no holes. In Combined Matte this will be a fully white matte for the body surrounded by full black. There will be no edge detail. Then use Screen Shrink to choke this in.+
+For the Edge Matte, I just cranked down the Clip Black until the green around the subject was gone. The matte is full of holes, but that's what the underlying Core Matte takes care of.+
+This method bypasses Keylight's Spill Suppresion, so you might need to add AE's Spill Supressor afterwards, or a Hue/Saturation effect set to isolate and desaturate the greens.+