Hollywoods History of Faking It | The Evolution of Greenscreen

making HBO show title in AE

http://lesterbanks.com/2014/01/create-double-exposure-animation-effects/

Cinematography Learn from a Master

switch nuke channel by expression node

set cut_paste_input [stack 0]
version 7.0 v10
ColorWheel {
 inputs 0
 gamma 0.45
 name ColorWheel2
 selected true
 xpos -68
 ypos -329
}
CheckerBoard2 {
 inputs 0
 name CheckerBoard3
 selected true
 xpos -191
 ypos -331
}
add_layer {JimmyChannel JimmyChannel.red JimmyChannel.green JimmyChannel.blue JimmyChannel.alpha}
ShuffleCopy {
 inputs 2
 alpha alpha2
 black red
 white green
 red2 blue
 green2 alpha
 out2 JimmyChannel
 name ShuffleCopy4
 label "模擬同一串流裡面有一組channel叫\nJimmyChannel"
 note_font_size 20
 selected true
 xpos -139
 ypos -217
}
Expression {
 channel0 {forward.u -forward.v -backward.u -backward.v}
 expr0 JimmyChannel.red
 channel1 {-forward.u forward.v -backward.u -backward.v}
 expr1 JimmyChannel.green
 channel2 {-forward.u -forward.v backward.u -backward.v}
 expr2 JimmyChannel.blue
 channel3 {-forward.u -forward.v -backward.u backward.v}
 expr3 JimmyChannel.alpha
 name Expression9
 label "將JimmyChannel切換到motion channel"
 note_font_size 20
 selected true
 xpos -139
 ypos -94
}

useful info about nuke expression node : http://www.nukepedia.com/written-tutorials/expressions-101
and thanks seadog's help!

nb_MariTools 1.0 from Nicholas Breslow

nb_MariTools 1.0 from Nicholas Breslow on Vimeo.

https://vimeo.com/86082496

http://nbreslow.com/nbmaritools

shuffle-out-all-channels Script

http://www.muttsy.net/blog/2011/10/20/shuffle-out-all-channels/

nodes = nuke.selectedNodes()
for node in nodes:
 if node.Class() == 'Read':
  channels = node.channels()
  layers = list( set([channel.split('.')[0] for channel in channels]) )
  layers.sort()
  if 'rgba' in layers:
   layers.remove('rgba')
  for layer in layers:
   shuffleNode = nuke.nodes.Shuffle(label=layer,inputs=[node])
   shuffleNode['in'].setValue( layer )
   shuffleNode['postage_stamp'].setValue(True)
 else:
  pass

mask3d node

set cut_paste_input [stack 0]
version 7.0 v10
push $cut_paste_input
Group {
 name mask3d
 selected true
 xpos 1457
 ypos -418
 addUserKnob {20 User}
 addUserKnob {18 pos l Position t "Select the colour that corresponds to the position you want."}
 pos {5.994726658 48.59552765 6.745039463}
 addUserKnob {13 rad l Radius}
 rad {0.7 {rad.x} {rad.x}}
 addUserKnob {7 fall l "Falloff Exponent" R 1 10}
 fall 3.25
 addUserKnob {7 gain l Hardness}
 gain 0.54
}
 Input {
  inputs 0
  name __POS_INPUT__
  xpos 95
  ypos 536
 }
 Expression {
  temp_name0 distR
  temp_expr0 (Br-parent.pos.r)/rad.x
  temp_name1 distG
  temp_expr1 (Bg-parent.pos.g)/rad.y
  temp_name2 distB
  temp_expr2 (Bb-parent.pos.b)/rad.z
  temp_name3 len
  temp_expr3 sqrt((distR*distR)+(distG*distG)+(distB*distB))
  expr0 pow(1-len,fall)
  expr1 pow(1-len,fall)
  expr2 pow(1-len,fall)
  expr3 pow(1-len,fall)
  name __POSITION_KEY__
  xpos 95
  ypos 597
 }
 Clamp {
  channels rgba
  name Clamp1
  xpos 95
  ypos 641
 }
 Group {
  name Perlin_gain
  help "This is an implementation of Ken Perlin's gain function. It boosts micro-contrast (acutance, in photographic terms) without clipping. When set to 0.5, it has no effect. When >0.5, gain is boosted; when <.5, gain is muted. Only luminance is affected; not hue nor saturation. Superwhites remain untouched."
  tile_color 0xcc9d6d00
  xpos 95
  ypos 686
  addUserKnob {20 "" l User}
  addUserKnob {7 realGain l "Perlin Gain function" t "This is an implementation of Ken Perlin's gain function. It boosts micro-contrast (acutance, in photographic terms) without clipping. When set to 0.5, it has no effect. When >0.5, gain is boosted; when <.5, gain is muted. Only luminance is affected; not hue nor saturation. Superwhites remain untouched."}
  realGain {{parent.gain}}
 }
  Input {
   inputs 0
   name Input1
   selected true
   xpos 130
   ypos -89
  }
  Expression {
   temp_name0 gain
   temp_expr0 parent.realGain
   temp_name1 lum
   temp_expr1 "0.2125*Br + 0.7154*Bg + 0.0721*Bb"
   temp_name2 val
   temp_expr2 .5*((lum<.5)?((1-gain)>0?pow(2*lum,log(1-gain)/log(0.5)):0):2-((1-gain)>0?pow(2-2*lum,log(1-gain)/log(0.5)):0))
   expr0 r>1?r:r*(val/(lum+0.00001))
   expr1 g>1?g:g*(val/(lum+0.00001))
   expr2 b>1?b:b*(val/(lum+0.00001))
   name KPGain
   tile_color 0xd47f3b00
   label "TRUE GAIN\nFUNCTION"
   xpos 130
   ypos -24
   addUserKnob {20 "" l User}
  }
  Output {
   name Output1
   xpos 130
   ypos 98
  }
 end_group
 Clamp {
  channels rgba
  name Clamp2
  selected true
  xpos 95
  ypos 731
 }
 Output {
  name Output1
  xpos 95
  ypos 839
 }
end_group

Enable the mip production shader in Maya mentalRay

The Mental Ray production shaders are hidden by default.  mip_* mib_* mia_*

Simply go to your script editor, type in:

optionVar -intValue "MIP_SHD_EXPOSE" 1;

Also check out info on the finest in Mental Ray websites from Zap

http://mentalraytips.blogspot.com.br/2007/10/production-shaders-hidden-treasures-of.html

To find more info you can always search "Mental Ray production shaders" as well as read the 2013 Mental Ray production manual online.

http://docs.autodesk.com/MENTALRAY/2013/ENU/mental-ray-help/

LiveAction CG VFX HDR LightComp test breakdown

LiveAction CG VFX HDR LightComp test breakdown from vfxjimmy on Vimeo.
Thanks Rex's Camera support to let this demo happen!

Camera Projection Mapping in Maya

http://cg.tutsplus.com/tutorials/autodesk-maya/camera-projection-mapping-in-maya/