The movie is loosely based on the ten issue maxi-series of the same name. Many details and plot points have been changed or completely removed. The screenplay focuses more on the relationship between Evey and V than the source material did. The characters of Mr. Almond and his wife are non-existent, and the both the opening and the climax. As a result, writer Alan Moore kept his name off the project, and it is credited as being based on graphic novels "illustrated by David Lloyd." In the short Freedom! Forever! Making V for Vendetta, available as a special feature on the DVD (and presumably the BluRay), these changes are justified by the density of the source material versus time and budgetary constraints.
Now, over a decade after the film's theatrical release, V's distinctive mask and costume can still be found in costume shops and is a popular item during Halloween. The film, not the comics, prompted the direct action group Anonymous to take up the Guy Fawkes mask as their symbol.