This directory contains the Unix source archives. In order to have a usable POV-Ray 3.1g system, you MUST have the documentation, scene, and include files in addition to an executable. If you don't already have a version of POV 3.1g for another platform, this means you have to download both povuni_s.tgz and povuni_d.tgz in order to use POV 3.1g at all. If you already have another version of POV 3.1g installed on your system, and you only want to compile your own version, or you can copy the include files and documentation from another computer, then you only need to download povuni_s.tgz.