INDUSTRIAL LIGHT & MAGIC
'(<a href="http://www.j-archive.com/media/2008-11-04_J_14.jpg" target="_blank">Sarah of the Clue Crew appears to be in the desert, but is actually at Industrial Light & Magic in San Francisco, CA.</a>) Bluescreen photography, which lets us <a href="http://www.j-archive.com/media/2008-11-04_J_14a.jpg" target="_blank">transport</a> an actor to a place like Tatooine, is possible because the base material in color film is sensitive to these three primary colors'
red, green & blue