Two years later, when 20th Century Fox released a movie version of "The League of Extraordinary Gentlemen," the screenwriter Larry Cohen and the producer Martin Poll sued the studio, charging that elements of the film had been plagiarized from their work. Though the film, which was one of the year's costliest flops, differed drastically from the graphic novel, the lawsuit nonetheless claimed that the "Extraordinary Gentlemen" comics had been created as a "smokescreen" to cover up the theft.
Mr. Moore found the accusations deeply insulting, and the 10 hours of testimony he was compelled to give, via video link, even more so. "If I had raped and murdered a schoolbus full of retarded children after selling them heroin," he said, "I doubt that I would have been cross-examined for 10 hours." When the case was settled out of court, Mr. Moore took it as an especially bitter blow, believing that he had been denied the chance to exonerate himself.
Since then, he has refused to allow any more movies to be made from work he controls. In the case of work whose rights he does not control, he has refused credits on any film adaptations, and has given his share of option money and royalties to the artists who illustrated the original comic books. That position is so radical that though his colleagues say they respect his position, few in the film industry can understand it.
"It's very simple, but they don't seem to hear it," said John O'Neill, the illustrator of "The League of Extraordinary Gentlemen." "They just gravitate towards offering more money."
Last year, when Mr. Moore received a phone call from Larry Wachowski who, with his brother, Andy, had written and directed the "Matrix" movies to discuss the "V for Vendetta" film that the Wachowskis were writing and producing for Warner Brothers, Mr. Moore felt he had made it clear that he did not want to be involved in the project.
"I explained to him that I'd had some bad experiences in Hollywood," Mr. Moore said. "I didn't want any input in it, didn't want to see it and didn't want to meet him to have coffee and talk about ideas for the film."
But at a press conference on March 4, 2005, to announce the start of production on the "V for Vendetta" film, the producer Joel Silver said Mr. Moore was "very excited about what Larry had to say and Larry sent the script, so we hope to see him sometime before we're in the U.K." This, Mr. Moore said, "was a flat lie."
"Given that I'd already published statements saying I wasn't interested in the film, it actually made me look duplicitous," he said.