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Despill

ToolSets / Stack

Stack

2026-09-07

ToolSets/stack/despill.nk

despill

keylight

stack

plate

spill

utility

CIE-LCH

View on GitHub

Keylight-based despill that writes a plate_despill layer, restoring original lightness from plate_denoise via a CIE-LCH merge.

Despill pulls the plate_denoise layer, runs it through Keylight for screen despill, then rebuilds the RGB so spill is reduced without losing the plate’s original lightness.

After Keylight, Merge Alt converts the despill result and the untouched plate_denoise into CIE-LCH, copies lightness from the source plate onto the despill, and converts back to the working colorspace. The result is shuffled into a plate_despill layer and copied onto the main pipe.

Use it in a stack when you already have plate_denoise and need a dedicated plate_despill pass for keys, grades, or downstream comp work. Tune spill in Keylight as usual; the lightness restore keeps luminance tied to the denoised plate.

Script code

set cut_paste_input [stack 0]
version 13.0 v1
push $cut_paste_input
Dot {
 name Dot24
 selected true
 xpos 7716
 ypos -4862
}
set N51135600 [stack 0]
Dot {
 name Dot25
 selected true
 xpos 7384
 ypos -4862
}
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]"
 selected true
 xpos 7350
 ypos -4820
}
set N51134800 [stack 0]
OFXuk.co.thefoundry.keylight.keylight_v201 {
 show "Final Result"
 unPreMultiply false
 screenColour {0.0280456543 0.03671264648 0.267578125}
 screenGain 1
 screenBalance 0.95
 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 Keylight3
 selected true
 xpos 7177
 ypos -4733
}
push $N51134800
Group {
 inputs 2
 name mergeAlt
 tile_color 0x421010ff
 selected true
 xpos 7350
 ypos -4689
 addUserKnob {20 mergeAlt}
 addUserKnob {4 operation l "" +STARTLINE M {color}}
 addUserKnob {26 "" +STARTLINE}
 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]"
 selected true
 xpos 7350
 ypos -4572
}
Dot {
 name Dot26
 selected true
 xpos 7384
 ypos -4478
}
push $N51135600
Copy {
 inputs 2
 channels plate_despill
 name Copy4
 selected true
 xpos 7682
 ypos -4494
}