I saw this the other day and thought to myself, this is great but you can do that samething right now. Heres how.
set cut_paste_input [stack 0]
version 7.0 v9
push $cut_paste_input
NoOp {
name FG_PLATE
selected true
xpos 142
ypos 33
}
set N15f060c0 [stack 0]
NoOp {
name Blue_or_green_palte
selected true
xpos -27
ypos 33
}
NoOp {
inputs 0
name Color_Corrected_Plate
selected true
xpos -137
ypos -35
}
Merge2 {
inputs 2
operation difference
name Merge1
selected true
xpos -137
ypos 33
}
Saturation {
saturation 0
name Saturation1
selected true
xpos -137
ypos 231
}
push $N15f060c0
Merge2 {
inputs 2
operation plus
name Merge2
selected true
xpos 142
ypos 231
}
Use a merge set to difference between the color corrected version and the non color corrected version. You then need to make it gray scale by desaturating the image. That will give you a dispill matte. You then plus this on top of your color corrected green screen plate. Then you can use the mix in the merge to control how much is added back in. This is also a knob in many dispill gizmos, it's called relight.
Enjoy.