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Channel Despill

ToolSets / Channel

Channel

2026-09-07

ToolSets/channel/channelDespill.nk

despill

channel

keylight

spill

plate

utility

View on GitHub

Keylight-based despill that reads plate_denoise, writes plate_despill, and exposes Screen Colour for spill suppression.

Channel Despill runs a Keylight despill on the plate_denoise layer and writes the result to plate_despill on the incoming stream. The only exposed control is Screen Colour, linked to the internal Keylight node.

Use it when spill removal should live on a dedicated plate_despill layer rather than replacing the beauty RGB in place. Set Screen Colour to the dominant screen or spill hue so Keylight can pull that cast out of the denoise plate.

Internally, the Keylight final result is combined with the pre-despill plate in CIE-LCH through a color merge, then shuffled to plate_despill and copied onto the original input. Other streams and layers pass through unchanged.

Script code

set cut_paste_input [stack 0]
version 15.1 v3
push $cut_paste_input
Group {
name channelDespill
tile_color 0x421010ff
selected true
xpos 36163
ypos -2950
addUserKnob {20 User l "Despill Channel"}
addUserKnob {41 screenColour l "Screen Colour" T Keylight1.screenColour}
addUserKnob {26 "" +STARTLINE}
}
Input {
inputs 0
name Input
xpos 198
ypos 196
}
Dot {
name Dot42
xpos 232
ypos 237
}
set Na5d64800 [stack 0]
Dot {
name Dot43
xpos -100
ypos 237
}
add_layer {plate_denoise plate_denoise.red plate_denoise.green plate_denoise.blue plate_denoise.alpha}
Shuffle {
in plate_denoise
alpha white
name ShuffleOld2
label "\[value in]"
xpos -134
ypos 279
}
set Na5d65000 [stack 0]
OFXuk.co.thefoundry.keylight.keylight_v201 {
show "Final Result"
unPreMultiply false
screenColour {0.1081760973 0.2974774539 0.07770714909}
screenGain 1
screenBalance 0.5
alphaBias {0.5 0.5 0.5}
despillBias {0.5 0.5 0.5}
gangBiases true
preBlur 0
"Screen Matte" 0
screenClipMin 0
screenClipMax 1
screenClipRollback 0
screenGrowShrink 0
screenSoftness 0
screenDespotBlack 0
screenDespotWhite 0
screenReplaceMethod "Soft Colour"
screenReplaceColour {0.5 0.5 0.5}
Tuning 0
midPoint 0.5
lowGain 1
midGain 1
highGain 1
"Inside Mask" 1
sourceAlphaHandling "Add To Inside Mask"
insideReplaceMethod "Soft Colour"
insideReplaceColour {0.5 0.5 0.5}
Crops 0
SourceXMethod Colour
SourceYMethod Colour
SourceEdgeColour 0
SourceCropL 0
SourceCropR 1
SourceCropB 0
SourceCropT 1
balanceSet false
insideComponent None
outsideComponent None
cacheBreaker true
name Keylight1
xpos -310
ypos 366
}
push $Na5d65000
Group {
inputs 2
name mergeAlt
tile_color 0x421010ff
xpos -134
ypos 430
addUserKnob {20 mergeAlt}
addUserKnob {4 operation l "" +STARTLINE M {color}}
addUserKnob {26 ""}
addUserKnob {26 lbl l "" +STARTLINE T "Merge Alt v1.0"}
addUserKnob {22 btn l DerekVFX.ca T "nuke.tcl('start', 'https://derekvfx.ca')" +STARTLINE}
}
Dot {
inputs 0
name Dot4
xpos 1008
ypos -747
}
Input {
inputs 0
name B
xpos 725
ypos -573
}
Colorspace {
colorspace_out CIE-LCH
name Colorspace8
xpos 725
ypos -369
}
Input {
inputs 0
name A
xpos 488
ypos -575
number 1
}
Colorspace {
colorspace_out CIE-LCH
name Colorspace9
xpos 488
ypos -373
}
ShuffleCopy {
inputs 2
red red
name ShuffleCopy3
xpos 725
ypos -309
}
Colorspace {
colorspace_in CIE-LCH
name Colorspace10
xpos 725
ypos -270
}
Output {
name Output1
xpos 725
ypos -110
}
end_group
add_layer {plate_despill plate_despill.red plate_despill.green plate_despill.blue plate_despill.alpha}
Shuffle {
out plate_despill
name ShuffleOld3
label "\[value in]"
xpos -134
ypos 527
}
Dot {
name Dot44
xpos -100
ypos 621
}
push $Na5d64800
Copy {
inputs 2
channels plate_despill
name Copy8
xpos 198
ypos 605
}
Output {
name Output1
xpos 198
ypos 705
}
end_group