You've already used the Node Editor when you created depth of field in the previous chapter. Now it's time to get a little bolder and use it to create stereographic 3D images which will use the Node Editor's ability to modify an image.
Since Red-Cyan anaglyph glasses are an inexpensive way to get the 3D separation when viewing an image, you are going to separate the images into a red image and a cyan image.
Note
The stereographic images were created with the jonboat and oars that you made in Chapter 6, Making and Moving the Oars. They were recorded with a stereo rig adapted from the one you made in 6907OS_06_Using Stereoscopic Camerasl.pdf and then dropped into the world made in Chapter 10, Modeling Organic Forms, Sea, and Terrain.