Cineon difference against a tiny blur, then Grade, to amplify residual grain for inspection.
Grain Check converts to Cineon, differences against a sub-pixel blur, and Grades a very low whitepoint so grain structure pops in the viewer.
Inspection only. Useful for judging denoise, regrain match, or whether CG grain is in the right ballpark.
set cut_paste_input [stack 0]
version 12.1 v4
push $cut_paste_input
Group {
name grainCheck
tile_color 0x421010ff
selected true
xpos -1110
ypos 410
addUserKnob {20 User l template}
addUserKnob {26 ""}
addUserKnob {26 lbl l "" +STARTLINE T "Template v1.0"}
addUserKnob {22 btn l DerekVFX.ca T "nuke.tcl('start', 'https://derekvfx.ca')" +STARTLINE}
}
Input {
inputs 0
name Input
xpos 447
ypos 61
}
Dot {
name Dot17
note_font_size 40
xpos 633
ypos 251
}
set Nda88c00 [stack 0]
Colorspace {
colorspace_out Cineon
name Colorspace1
label "value colorspace_in] -> \[value colorspace_out]"
xpos 808
ypos 253
}
Blur {
channels rgba
size 0.67
name Blur1
label "\[value size] px"
xpos 808
ypos 315
}
push $Nda88c00
Colorspace {
colorspace_out Cineon
name Colorspace3
label "value colorspace_in] -> \[value colorspace_out]"
xpos 682
ypos 299
}
Merge2 {
inputs 2
operation difference
bbox B
name Merge4
xpos 723
ypos 433
}
Grade {
whitepoint 0.0004
name Grade1
xpos 723
ypos 459
}
Output {
name Output1
xpos 447
ypos 1055
}
end_group