There are some great community resources for using Keylight. They are easy to find by simply typing "keylight" in the search field at the top right corner of the app. It has all the controls you need. It also takes a little while to learn how to use it correctly.
I've already spent many hours looking through the content on this site and others but I cannot find anything that addresses my specific problem. Hence the reason I've resorted to using the forums.
basically key out using the intermediate setting. don't worry about green tints on face yet.
use that as an alpha matte
use the final output for final spill supression
Show me a high quality still frame from your footage and I'll take a look.
The procedure is usually to
- Create a loose garbage matte to get rid of almost everything around your foreground subject so you have less to key
- Sample the color
- Check the status and adjust the screen gain and screen balance to bring the background towards black and the foreground towards white and grey
- Clip white and clip black to put a grey boundary between the white foreground and black background
- Check the Combined matte and clean up the edges with pre-screen blur and fine tuning the other Screen Matte controls
- Change the view to final result and make color and edge corrections
If all else fails and you can get a good combined matte then you can either use the Combined Matte as a Luma Track Matte for the original footage or you can use Final Result as an Alpha Track matte for the original footage.
This method was not what I was expecting, but it did exactly what I needed it to do. Most importantly, it was very quick and simple! I don't know why so many guides try to over-complicate this; it only confuses idiots like me. Thanks again, Chris.