The "Panorama To Cubemap" script involves deployment of the panorama image of a sphere map with a 2x1 ratio onto 6 Cubemap images via Unity.
Panorama photos taken with the iPhone app "PhotoSynth" can be used as Unity backgrounds.
Additionally, you can automatically create Skybox for use with the background.
If you select [Window]-[Panorama To Cubemap] from the main menu, then the
Panorama To Cubemap window will be displayed.
Please read Documents/PanoramaToCubemap_en.txt.