- [Steve] Hi, this is Steve Wright,…welcoming you to this weeks Nuke Nugget…how to track a 3D object to a CGI render.…The idea is to use the position pass,…which contains the XYZ location of each pixel…to position a 3D object.…Nuke Nuggets are often short little techniques…but occasionally I like to mix in some next level…techniques like this.…Okay, to do this,…you have to have a CGI render with a position pass…plus the camera.…Here's the camera that did the original CG render.…
This is just a 2D EXR file.…There's no geometry here,…and I can show you my position pass right there.…Okay, so let's get to it.…What we want to do is sample from this position pass…the XYZ location frame by frame…and feed that to a piece of geometry…so it'll track right on top of this surface.…All right, here we go.…In order to see what the original geometry looked like,…we can use the position to points node.…
So select the read node, go to 3D, Geometry,…Position to Points.…And then I'll tell it to go look for…the position pass in the position pass.…
Author
Updated
3/1/2018Released
3/3/2016What kinds of NUKE tips do you need? Join the Steve Wright's NUKE NUGGETS group on LinkedIn, and post your requests there.
Skill Level Intermediate
Duration
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Introduction
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1. Nuke Nuggets Weekly 2016 Q1
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002 Photorealistic light glows11m 36s
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066 Hierarchical roto7m 28s
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068 Curve editor12m 8s
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2. Nuke Nuggets Weekly 2016 Q2
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014 How to create a bump map9m 35s
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015 How to do a glam pass7m 54s
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3. Nuke Nuggets Weekly 2016 Q3
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031 How to use NUKE expressions10m 32s
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4. Nuke Nuggets Weekly 2016 Q4
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045 Advanced User Knobs7m 9s
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047 Secrets of the Grade node10m 35s
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Nuke Nuggets Weekly 2017 Q1
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053 Projections3m 15s
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054 Side by side3m 54s
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055 Gain without grain5m 28s
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056 Time markers6m 41s
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057 Position pass tracking9m 40s
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058 Field mask11m 2s
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059 Image array9m 53s
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060 TimeEcho clean plate6m 47s
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Nuke Nuggets Weekly 2017 Q2
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061 Normal relighting6m 1s
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062 Image lineup11m 17s
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063 Viewer magic9m 34s
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064 About time10m 9s
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065 More about time11m 7s
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067 Precorrect bluescreen6m 56s
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069 Animation time5m 17s
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070 IBKColour node11m 51s
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072 IBKGizmo node9m 28s
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Nuke Nuggets Weekly 2017 Q3
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073 Fog11m 5s
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074 Edge grading5m 45s
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075 Resize rotos3m 25s
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076 Edge extension5m 55s
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077 Color nodes10m 13s
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078 Wound reveal6m 28s
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084 Using the Emboss nodes5m 32s
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Nuke Nuggets Weekly 2017 Q4
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Nuke Nuggets Weekly 2018 Q1
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Video: 057 Position pass tracking