You can add any number of image planes to a camera.
You use image planes as visual references while building a model or as a means of compositing background or foreground images during rendering.
To add an image plane to a camera using Import Image Plane
to open the File Requestor.
The image plane appears in the modeling window.
You cannot load image planes that have alphabetic characters in their numeric extension (for example, an animated sequence having numeric extensions). Make sure that the extension only contains numbers. If the image sequence consists of fields, first use the filace utility to interlace the fields into frames.
You cannot use images that have extensions of five or more characters.
To add an image plane to a camera using the Camera Editor
to open the Camera Editor.
The image plane appears in the modeling window, and an image plane swatch appears in the Image Planes section of the Camera Editor.
To change image plane settings
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To delete one image plane from a camera
to open the Camera Editor.
The image plane is deleted from the camera’s window, and from the image plane swatch list in the Image Planes section of the Camera Editor.
To delete all image planes from a camera

to open the Delete Image Plane Options box.
To delete all image planes from all cameras

to open the Delete Image Plane Options box.