Scales R and B on separate Transforms, softens with GodRays, and mixes back for lens fringing.
Chromatic Aberration splits red and blue onto opposite Transforms (scale + aspect), builds soft fringe with GodRays, averages, and mixes over the original with an optional mask.
Scale, invert, pixel aspect, and mix are the main controls. Dial it so it reads as glass, not misregistration.
set cut_paste_input [stack 0]
version 9.0 v7
push $cut_paste_input
Group {
name chromaticAberration
tile_color 0x421010ff
selected true
xpos -1916
ypos 714
addUserKnob {20 User l chromaticArberation}
addUserKnob {7 scale R -1 1}
scale -0.52
addUserKnob {6 invert -STARTLINE}
invert true
addUserKnob {7 pixelAspect l aspect R -2 2}
pixelAspect 1
addUserKnob {41 mix T Copy1.mix}
addUserKnob {26 ""}
addUserKnob {26 lbl l "" +STARTLINE T "chromaticAberration v1.2"}
addUserKnob {22 btn l DerekVFX.ca T "nuke.tcl('start', 'https://derekvfx.ca')" +STARTLINE}
}
Input {
inputs 0
name mask
xpos 466
ypos -534
number 1
}
Input {
inputs 0
name Input
xpos 341
ypos -862
}
set Nc5c89800 [stack 0]
TransformMasked {
channels {rgba.red -rgba.green -rgba.blue none}
scale {{((parent.scale*(invert*2-1))/100)+1} {(((parent.scale*(invert*2-1))/100)*pixelAspect+1)}}
center {{input.width/2} {input.height/2}}
black_outside false
name Transform1
xpos 132
ypos -764
}
push $Nc5c89800
TransformMasked {
channels {-rgba.red -rgba.green rgba.blue none}
scale {{((parent.scale*-1*(invert*2-1))/100)+1} {((parent.scale*-1*(invert*2-1))/100)*pixelAspect+1}}
center {{input.width/2} {input.height/2}}
black_outside false
name Transform3
xpos 242
ypos -764
}
ShuffleCopy {
inputs 2
red red
green black
alpha black
name ShuffleCopy1
xpos 242
ypos -691
}
push $Nc5c89800
GodRays {
channels alpha
scale {{parent.Transform1.scale} {parent.Transform1.scale}}
center {{parent.Transform1.center} {parent.Transform1.center}}
name GodRays2
xpos -88
ypos -764
}
push $Nc5c89800
GodRays {
channels alpha
scale {{parent.Transform3.scale} {parent.Transform3.scale}}
center {{parent.Transform3.center} {parent.Transform3.center}}
name GodRays1
xpos 22
ypos -764
}
Merge2 {
inputs 2
operation average
name Merge3
xpos 22
ypos -674
}
ShuffleCopy {
inputs 2
red red
green black
blue blue
alpha alpha2
name ShuffleCopy3
xpos 242
ypos -585
}
push $Nc5c89800
Copy {
inputs 2+1
from0 rgba.red
to0 rgba.red
from1 rgba.blue
to1 rgba.blue
bbox B
name Copy1
xpos 341
ypos -547
}
set N5c65c800 [stack 0]
Viewer {
frame_range 1001-1134
input_process false
name Viewer1
xpos 866
ypos -231
}
push $N5c65c800
Output {
name Output1
xpos 341
ypos -478
}
end_group