The Nuke 3D Engine - Nuke 101: Professional Compositing and Visual Effects - page 383

I am teaching the 3D engine here, I will show you an interesting way to do this involving
a 3D setup and some new tools.
The idea is to cut a hole in the render with a matte and use it to show through to the back-
ground,whichdoesn'thavethelemming orthehookinit.You'llgenerate thematte using
a RotoPaint node connected to a Tracker node. The Tracker node won't take its data from
2D tracking, but directly from 3D data. Bit by bit I walk you through this process. Fear
not.
Setting up a Nuke 3D scene
Because you will also need the original background of this comp, bring that in.
1. Now that you know how to use the Project Settings panel, set up the script by
opening the Project Settings panel and changing Full Size Format to HD and Fps
to 25. Also change the length of the composite to 1-143.
2. From chapter03/bg/ import bg.####.png.
Now that the background and the render are both in, you can start to create the
rest of the comp and step into the 3D engine.
The first element you will be creating is a camera.
3. With nothing selected in the DAG, create a Camera node from the 3D toolbox.
4. With nothing selected, create a Scene node from the 3D toolbox.
5. Select Camera1 and Scene1 and insert a ScanlineRender node from the 3D tool-
box. The ScanlineRender node connects itself to the Camera and Scene nodes in
the correct inputs ( FIGURE 9.2 ) .
Figure 9.2. The beginning of a 3D setup.