Nuke Generation of Mist

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Mist slowly rolling across the ground. Noise has been used to make the mist. The key problem is making the edge of the mist look natural. For this the Minus Blend Modes was used.

Nuke generation of mist.

Press 'Expand' and select and copy everything below this line, then paste into the Nuke node graph.

set cut_paste_input [stack 0]
version 9.0 v7
BackdropNode {
 inputs 0
 name FLUFFY_SHAPE
 tile_color 0x87854701
 gl_color 0x87854701
 label "FLUFFY SHAPE"
 note_font "Arial Black"
 note_font_size 20
 selected true
 xpos -2383
 ypos -178
 bdwidth 200
 bdheight 182
}
BackdropNode {
 inputs 0
 name "MERGED WITH DARK SKYE"
 tile_color 0x87854701
 gl_color 0x87854701
 label "MERGED WITH DARK SKYE"
 note_font "Arial Black"
 note_font_size 20
 selected true
 xpos -2029
 ypos 22
 bdwidth 200
 bdheight 217
}
BackdropNode {
 inputs 0
 name "MINUS BLEND MODE"
 tile_color 0x87854701
 gl_color 0x87854701
 label "MINUS BLEND MODE"
 note_font "Arial Black"
 note_font_size 20
 selected true
 xpos -2427
 ypos 120
 bdwidth 200
 bdheight 118
}
BackdropNode {
 inputs 0
 name "SLOW MOVING NOISE"
 tile_color 0x87854701
 gl_color 0x87854701
 label "SLOW MOVING NOISE"
 note_font "Arial Black"
 note_font_size 20
 selected true
 xpos -2742
 ypos 83
 bdwidth 200
 bdheight 157
}
StickyNote {
 inputs 0
 name StickyNote6
 label "Makes a big, fluffy shape."
 selected true
 xpos -2366
 ypos -215
}
StickyNote {
 inputs 0
 name StickyNote7
 label "Makes a slow moving noise"
 selected true
 xpos -2694
 ypos 48
}
StickyNote {
 inputs 0
 name StickyNote8
 label "This is the crucial stage. The noise and the shape are merged with each other\nusing the minus blend mode (which was arived at through trial and error). \nThe video colorspace was also enabled (again trial and error). "
 selected true
 xpos -2473
 ypos 64
}
StickyNote {
 inputs 0
 name StickyNote9
 label "Here, the result is simply merged against a dark blue, represnting a sky. "
 selected true
 xpos -2095
 ypos -8
}
Constant {
 inputs 0
 channels rgb
 color {0.02622599714 0.03908976912 0.04699999839 0}
 format "1920 1080 0 0 1920 1080 1 HD_1080"
 name Constant1
 selected true
 xpos -2009
 ypos 102
}
set Nac06fc10 [stack 0]
Reformat {
 inputs 0
 format "1920 1080 0 0 1920 1080 1 HD_1080"
 name Reformat6
 selected true
 xpos -2657
 ypos 162
}
Noise {
 zoffset {{curve i x1 0 l x30 0.2017267346}}
 gain 0.48
 translate {{curve x1 0 l x30 168.7168579} 0}
 center {1024 778}
 name Noise3
 selected true
 xpos -2657
 ypos 201
}
push $cut_paste_input
Reformat {
 format "1920 1080 0 0 1920 1080 1 HD_1080"
 name Reformat5
 selected true
 xpos -2363
 ypos -98
}
Rectangle {
 area {-160 690 2495 1720}
 softness 100
 name Rectangle5
 selected true
 xpos -2363
 ypos -66
}
Blur {
 size 500
 name Blur4
 selected true
 xpos -2363
 ypos -42
}
Merge2 {
 inputs 2
 operation minus
 sRGB true
 name Merge6
 selected true
 xpos -2363
 ypos 201
}
push $Nac06fc10
Merge2 {
 inputs 2
 mix 0.375
 name Merge8
 selected true
 xpos -2009
 ypos 201
}
Write {
 name Write2
 selected true
 xpos -2009
 ypos 331
}
Viewer {
 inputs 2
 frame 21
 frame_range 1-100
 name Viewer1
 selected true
 xpos -2009
 ypos 496
}