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Blur Log

ToolSets / Filter

Filter

2026-09-07

ToolSets/filter/blurLog.nk

filter

blur

log

logc

colorspace

alexa

utility

View on GitHub

Applies Nuke’s Blur in Alexa V3 LogC: convert to LogC, blur, convert back, with channels, size, filter, quality, crop, and mix.

Blur Log converts the input to Alexa V3 LogC, applies a Blur, then converts back from LogC. Blur is evaluated in log encoding instead of the incoming working space.

Use it for soft diffusion or gentle blur on log plates, or when LogC blur behavior should match the plate without wrapping a full colorspace chain around a single Blur.

The group exposes the internal Blur controls: channels, size, filter, quality, crop to format, and mix. The tile label shows the current size in pixels.

Script code

set cut_paste_input [stack 0]
version 12.1 v4
push $cut_paste_input
Group {
 name blurLog
 tile_color 0x421010ff
 label "\[value size] px"
 selected true
 xpos -1075
 ypos -15
 addUserKnob {20 User l blurLog}
 addUserKnob {41 channels T Blur1.channels}
 addUserKnob {41 size T Blur1.size}
 addUserKnob {41 filter T Blur1.filter}
 addUserKnob {41 quality l "" -STARTLINE T Blur1.quality}
 addUserKnob {41 crop l "crop to format" -STARTLINE T Blur1.crop}
 addUserKnob {41 mix T Blur1.mix}
 addUserKnob {26 ""}
 addUserKnob {26 lbl l "" +STARTLINE T "Blur Log v1.0"}
 addUserKnob {22 btn l DerekVFX.ca T "nuke.tcl('start', 'https://derekvfx.ca')" +STARTLINE}
}
 Input {
  inputs 0
  name Input
  xpos 447
  ypos 59
 }
 Colorspace {
  colorspace_out AlexaV3LogC
  name Colorspace1
  xpos 447
  ypos 203
 }
 Blur {
  channels rgba
  name Blur1
  label "\[value size] px"
  xpos 447
  ypos 296
 }
 Colorspace {
  colorspace_in AlexaV3LogC
  name Colorspace2
  xpos 447
  ypos 353
 }
 Output {
  name Output1
  xpos 447
  ypos 1055
 }
end_group