The Nuke 3D Engine - Nuke 101: Professional Compositing and Visual Effects - page 396

Now that you have slightly poorer quality but a quicker playback, you can play
thewholeshot.Remember,thefirsttimeyouplayintheViewer,framesarebeing
rendered and cached to the disk. The second time around, the cached images are
being played back, so you don't have to wait for renders.
16. Click Play in the Viewer.
You can see the cube is sticking to the floor, proving the track is perfect.
17. Click Stop in the Viewer and go back to frame 1.
18. Switch the Downrez drop-down menu back to 1.
19. In the Viewer, click the Proxy button again to turn it off.
You are ready to use the camera to produce a matte for the latch.
Reconcile3D: Transforming 3D Data into 2D Data
Reconcile3Disagreattoolforworkingwith3Drenders.Itenablesthecompositortopick
a location in the 3D world and easily convert it to 2D position, just like a tracker, but
without actually tracking. You will use this technique here to generate two tracked points
in the 2D world, attach them to a Tracker node, and use it to move a RotoPaint shape.
Setting up a Reconcile3D node
ForReconcile3Dtoworkyouneedthreethings:acamera,whichyounowhave;adefined
resolution, the same as the full-size format in the project's Settings panel; and an Axis for
the location of the point you want to track.
1. Clear the Properties Bin to remove all on-screen controls.
2. With nothing selected, create another Axis node.
Where shall you place the axis? The next steps show you a good way to view the
3D scene in context.
3. Make sure you're in 3D view.
4. Select Read1 and press the 1 key to view it.