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Normal World To Camera

ToolSets / Draw

Draw

2026-09-07

ToolSets/draw/normalWorldToCamera.nk

normals

camera

transform

world space

camera space

utility

draw

View on GitHub

Transforms world-space normals into camera space with a connected Camera, optional channel pick, and optional 0–1 packed output.

Converts world-space normal maps into camera space for Nuke comps. Pipe normals into the first input and a Camera into the second; the Normal Map control selects which channels feed the transform.

Vectors are normalized, multiplied by the inverse of the camera world matrix, then normalized again. When Output Packed Format is on, RGB is remapped from signed range into 0–1; when off, signed camera-space normals are left as-is.

Use it when a lighting, shading, or utility setup expects camera-space normals and your pass or bake is still in world space.

Script code

set cut_paste_input [stack 0]
version 15.1 v3
push 0
push $cut_paste_input
Group {
 inputs 2
 name WorldToCameraNormals4
 tile_color 0x421010ff
 selected true
 xpos -2643
 ypos 36
 addUserKnob {20 User l worldToCameraNormals}
 addUserKnob {26 info l "" +STARTLINE T "World to Camera Space Normal Transform"}
 addUserKnob {41 in_1 l "Normal Map" T Shuffle1.in}
 addUserKnob {6 outputPacked l "Output Packed Format (0-1 Range)" +STARTLINE}
 outputPacked true
 addUserKnob {26 "" +STARTLINE}
 addUserKnob {32 btn l DerekVFX.ca T "nuke.tcl('start', 'https://derekvfx.ca')" +STARTLINE}
}
 Input {
  inputs 0
  name normals
  label "\[value number]"
  xpos -150
  ypos -57
 }
 Shuffle {
  name Shuffle1
  xpos -150
  ypos 33
 }
set Nbd7a9800 [stack 0]
 Expression {
  temp_name0 length
  temp_expr0 "sqrt(r*r + g*g + b*b)"
  expr0 r/length
  expr1 g/length
  expr2 b/length
  name Normalize
  xpos -150
  ypos 81
 }
 ColorMatrix {
  matrix {
      {{"\[value input1.world_matrix.0]"} {"\[value input1.world_matrix.1]"} {"\[value input1.world_matrix.2]"}}
      {{"\[value input1.world_matrix.4]"} {"\[value input1.world_matrix.5]"} {"\[value input1.world_matrix.6]"}}
      {{"\[value input1.world_matrix.8]"} {"\[value input1.world_matrix.9]"} {"\[value input1.world_matrix.10]"}}
    }
  invert true
  name CameraTransform
  xpos -150
  ypos 129
 }
 Expression {
  temp_name0 length
  temp_expr0 "sqrt(r*r + g*g + b*b)"
  expr0 r/length
  expr1 g/length
  expr2 b/length
  name Normalize2
  xpos -150
  ypos 177
 }
 Expression {
  expr0 "outputPacked ? r * 0.5 + 0.5 : r"
  expr1 "outputPacked ? g * 0.5 + 0.5 : g"
  expr2 "outputPacked ? b * 0.5 + 0.5 : b"
  name PackNormals
  xpos -150
  ypos 201
 }
push $Nbd7a9800
 Copy {
  inputs 2
  from0 rgba.red
  to0 rgba.red
  from1 rgba.green
  to1 rgba.green
  from2 rgba.blue
  to2 rgba.blue
  name Copy1
  xpos -150
  ypos 225
 }
 Output {
  name Output1
  xpos -150
  ypos 321
 }
 Input {
  inputs 0
  name camera
  label "\[value number]"
  xpos -40
  ypos -57
  number 1
 }
end_group