 Following the completion of principal photography in the first week of August 1981, Hooper went on to spend ten weeks in the editing room putting together the first cut of the film.Spielberg spent much of this time supervising the SFX photography being held at Industrial Light & Magic (ILM).According to the Blumhouse Productions website, "Poltergeist" 1st assistant camera John R. Leonetti reported that Spielberg directed the film more so than Hooper, stating, "Hooper was so nice and just happy to be there.