By default the files have the extension .pov . POV-Ray reads the file, processes it by creating an internal model of the scene and then renders the scene. The overall syntax of a scene is shown below. In plain English, this means that a scene contains one or more scene items and that a scene item may be any of the five items listed below it. The items may appear in any order.
None is a required item.
There are some restrictions on nesting directives also.