Silhouette chroma key effect - how to finish off? I'm so close to finishing this off but I can't get my foreground to be single matte color. I'm not sure where I need to place a node to do so. My foreground right now has some aberrations coming through due to bad lighting but how can I make the white area a solid color? Thanks]1
After your Mix node you will want to add either a Luminance Key node, or a ColorRamp node. Then just move the values around until you get what you are looking for.
Before:

After:

or

I hope this helps
-Tom