PointCloudKeyer v1.0

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Contributor: Isaac Spiegel
A 2D keyer that plots chroma information as a point cloud on the x and y axis. Allows the user the draw a roto shape around the pixels they want to key. Tested in Nuke 11.x but should be functional in any versions of Nuke which have BlinkScript. Video tutorial for the PointCloudKeyer: https://www.youtube.com/watch?v=4_EnJbYfwYQ For more information read about this node on my blog: isaacspiegel.com/blog
11.3, 11.2, 11.1, 11.0, 10.5 or later
24 Mar 2021


  1. Connect the Src input of the PointCloudKeyer into your foreground footage. (Optional: connect a background plate to composite later)

  2. Create a roto node and hook it into the Shape input

  3. With the View set to ‘Point Cloud’, select a color space that does a decent job separating out the screen color you want to key, Chroma Red/Blue should work for most cases. (Optional: connect the custom input a 2D color space image and set the color space to “Custom” to use your own input)

  4. Adjust the point cloud using the translate and scale knobs, if needed.

  5. Draw a roto shape around the screen color you want to key

  6. Preview your output by changing the view to “composite” or “final result” (Optional: use the “dense point cloud” and “overlay point cloud” to help place a roto shape that works well for your shot


Video tutorial for the PointCloudKeyer

For more information read about this node on my blog:

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0 # Lucas Pfaff 2021-03-27 12:47
hey man, I only watched the demonstration and couldn't put it to use yet, but this is probably the most exciting thing I saw in the last few weeks (Nuke 13 just isn't up there because I can't utilize the ML features, ha)

0 # Henry Wilkinson 2022-04-03 04:25
Have really appreciated this tool lately! An innovative keying interface. The onCreate line has a print() statement that needs brackets added to it for Python3 support :)
0 # Gaston Marcotti 2022-04-07 15:22
Bravo bravo bravo

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