ILM has posted to their YouTube account a new behind the scenes featurette showing how one of the longest and most difficult CGI sequences was put together. What made the particular shot such a massive undertaking is that it’s a long moving shot going from avenger to avenger without cutting, showing them fighting the enemy in New York.
While “The Avengers” posed many visual efffects challenges, one of the larger challenges was pulling together the “tie-in” shot during the third act of the film. Rather than frames, this single shot is measured in minutes on screen and is one of the longest effects shots in the film. It incorporates both practical special effects and extensive digital visual effects by ILM. The New York City environment that serves as the setting for this shot (and virtaully the entire alien invasion) is computer generated by the visual effects team at ILM.