Camera Projection - Nuke 101: Professional Compositing and Visual Effects - page 459

Camera projection means you are using a camera to project a texture onto geo-
metry, remember. To use a 3D term, you will use a texture and a camera to shade
geometry.Youwillfindthecameraprojectionnodeinthe3D/Shadertoolbox.It's
called Project3D.
20. Select Camera1 and from 3D/Shader choose Project3D ( FIGURE 11.9 ).
Figure 11.9. Inserting the Project3D node into the tree.