Time for action – creating the red image for the left eye

You will now use the Node Editor to create the Red channel, which shows what the left camera recorded and what your left eye will see:

1. Open a new file in Blender.
2. In the Dimensions subpanel of the Properties window, set the Resolution to X: 512, Y: 512, and 100%. Set the End: option in Frame Range to 64. Click on the Frame Rate button. Select Custom from the drop-down menu. Set FPS to 12.
3. In the top Blender window header, just to the right of Default, select the button with the three boxes and choose Compositing from the drop-down menu.
4. There are three windows: the Node Editor window on the top, the UV/Image Editor on the lower left, and the 3D View on the lower right, as shown in the following screenshot:
   
5. In the Node Editor window's header, look at the three graphic buttons just to the right of the word Node. They select the Node tree type that is active. Make sure the center of the three buttons is highlighted as shown in...