CompStart

Pro Lessons Courses Elements Software

Blur Log

ToolSets / Filter

Filter

2026-09-07

ToolSets/filter/blurLog.nk

filter

blur

log

colorspace

utility

alexa

View on GitHub

Applies a standard Nuke Blur in AlexaV3LogC by converting to log, blurring, then converting back.

Blur Log wraps Nuke’s Blur so the filter runs in AlexaV3LogC. The input is converted to LogC, blurred, then converted back for the rest of the tree.

Use it when you want blur evaluated in log encoding rather than your current working space—common for soft edges and log-pipeline plates where linear blur reads differently.

Controls are the internal Blur’s 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