We recently highlighted the poster artwork of Japan's Noriyoshi Ohrai, who back in 1978 had already broken the Star Wars "blue space" tradition and opted for a green one instead. The strong horizontals offered by the film's space-faring hardware coupled with the film's central characters is still a striking composition, and one that remains fresh 30 years on.
Originally, this poster was only available as a pull-out insert in an obscure Japanese "Town Mook" magazine/book -- a German poster house reprinted and enlarged the artwork years later.