5.0  POV-Ray Options
  The reference section describes all command line switches and INI file
  keywords that are used to set the options of POV-Ray. It is supposed to be
  used as a reference for looking up things. It does not contain detailed
  explanations on how scenes are written or how POV-Ray is used. It just
  explains all features, their syntax, applications, limits, drawbacks,
  etc.
   POV-Ray was originally created as a command-line program for operating
  systems without graphical interfaces, dialog boxes and pull-down menus. Most
  versions of POV-Ray still use command-line switches to tell it what to do.
  This documentation assumes you are using the command-line version. If you are
  using Macintosh, MS-Windows or other GUI versions, there will be dialog boxes
  or menus which do the same thing. There is system-specific documentation for
  each system describing the specific commands.