 Likewise, the powered armor technology that is not only central to the book, but became a standard subgenre of science fiction thereafter, is completely absent in the movie, where the characters use World War II-technology weapons and wear light combat gear little more advanced than that.In Verhoeven's movie of the same name, there is no battle armor.Verhoeven commented that he had tried to read the book after he had bought the rights to it, in order to add it to his existing movie.