Take a look at some of the elements involved in producing a successful key. Chromakey and related technologies, such as blue and green screen effects, have gotten so exact, they're the key to Hollywood blockbusters ranging from the recent trilogy of Star Wars prequels to such quasi-comic book films as Sky Captain, Sin City and 300. While Hollywood films still have multi-million-dollar budgets, they have saved considerable sums with green-screen effects, as sets are built in a computer, not by draftsmen and riggers. Similarly, because compositing via PC is now inexpensive enough that the average serious hobbyist can afford it, green-screen effects allow one-man video podcasts to have an extremely slick look, even if they're shot in a garage or a basement.