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How to use Slapshot 3D Tracks in Nuke

Learn how to use AI-powered 3D tracks created with Slapshot in Nuke

  1. Importing the track: Start by selecting the ReadGeo node in Nuke to import the 3D track generated in Slapshot. Be sure to use the undistort.exr file for import.
  2. Project Element: Use ModelBuilder to project the element. Make sure to select the correct point from the appropriate depth where the projection is intended. 
  3. Use Cards: Use Cards to project elements, assets, or clean plates into your scene.
  4. Use distort.exr: Finally use the distort.exr to matchit with the source.

    Video Illustration: Without Distortion

 

Note: To use Slapshot 3D Tracks in Nuke Calculating Distortion,  use the distort.exr file for import.  Follow steps as shown in the video illustration below.

Video Illustration: With Distortion

 

For additional assistance, please reach out to us at support@slapshot.ai.

FAQ:

Q: Why does Nuke crash when I connect the point cloud to the viewer?

A: This is a bug that's present in some versions of Nuke, which unfortunately is out of our control. To work around it there are two good options: 

1) Feed the ReadGeo node with the point cloud into the a ModelBuilder node and work with it that way.

2) Select the ReadGeo node and change Render points as to particles. 

Q: Why does Nuke crash when I connect the camera to the viewer directly?

A: This is the same bug as above. Even if you select to import the camera and the point cloud as separate nodes they are still linked in Nuke's memory and will crash. The best solution is to feed everything through the ModelBuilder node.