Rhythm and Hues, the visual effects company were hired to create the visual effects before it went bankrupt in 2013. Framestore, the special effects company was hired to complete the visual effects work.
When questioned by the Los Angeles Times about why Warner Bros. believed that he's the right man to write and direct the film, Akiva Goldsman replied: "I'm the kind of romantic that likes to find the meaning in things. Just in its natural course, life is sufficiently hard. And if you can find the hope underneath that, that there is connectedness and some reason to it, then there's some comfort in that. That's what I've learned anyway. And I think that feeling is in the movie."
When Isaac Penn's photo on the newspaper is first seen in a framed newspaper on the wall of his mansion in 1916, the framed newspaper next to it has the headline "Lusitania Sunk", which describes the sinking of the R.M.S. Lusitania which happened a year before the scene takes place.
Russell Crowe (Pearly Soames) and Norm Lewis (who has a cameo in the film as a librarian) have both played Inspector Javert in filmed versions of the musical "Les Misérables". Lewis played Javert in "Les Misérables in Concert: The 25th Anniversary" (2010), while Crowe played him in the 2012 film adaptation directed by Tom Hooper.
Will Smith (Judge) is not listed in the credits and the only actor who interacted with Smith in the movie was Russell Crowe. The other actors reportedly did not even see Smith during the filming. "It was my [idea]," Goldsman said. "I think the Devil needs to be very charismatic, I know no one more charismatic than Will." Per Yahoo Entertainment.
The trivia item below may give away important plot points.
The main part of the movie is set in 1916, but the book being read by the Judge/Lucifer (Will Smith) while he's relaxing on the couch is Stephen Hawking's, "A Brief History of Time" which won't be published until 1988. He is also wearing a Jimi Hendrix t-shirt. However, as Lucifer speaks about how his past, present, and future is all now, having these out of time items is part of the concept.