Camera projection is akin to a projector use in daily office use and in theaters.
As seen in the above GIF, you can easily use it to project a particular plate onto the scene geometry in Nuke.
How does camera projection integrate into my workflow?
The below list is a common use of camera projection in Nuke that I often employed:
- To project a matte painting to simple/complex geometry.
- Repaint a projected plate to create clean plate
- Relight a projected plate