- James Gunn's Superman (2025) is the first film in the new DC Universe. It stars David Corenswet as Clark Kent and Nicholas Hoult as Lex Luthor.
- AI appears as a thematic metaphor. Gunn compared Lex Luthor's resentment of Superman to how artists view generative AI: as an unearned rival that overshadows human achievement.
- The film is heavy on practical effects and CGI. Krypto the Superdog was 3D modeled after Gunn's own dog, Ozu, and Metamorpho's makeup took five to six hours daily.
- Real AI tools are used in modern filmmaking for previs, concept art, digital doubles, and marketing, but they are not the primary creative force behind Superman.
- Superman's VFX pipeline blended practical work, CGI, and machine-learning-assisted tools. ILM built a digital Metropolis, Framestore created Krypto from James Gunn's dog Ozu, and ILM used FaceSwap training for David Corenswet's digital double.
- The debate matters beyond fandom. It reflects Hollywood's larger conversation about human artistry, labor, and the role of generative AI in production.
James Gunn's Superman: Production Overview
Superman (2025) is the inaugural film in the newly launched DC Universe (DCU) produced by DC Studios. Written and directed by James Gunn, it reboots the Superman franchise with David Corenswet in the title role, Rachel Brosnahan as Lois Lane, and Nicholas Hoult as Lex Luthor. The story explores Clark Kent's struggle to reconcile his Kryptonian origins with the human values he learned in Smallville, Kansas (Onscreen Club).
The production was massive. Principal photography began on February 29, 2024, in Svalbard, Norway, for the Fortress of Solitude scenes, with the majority shot at Trilith Studios in Atlanta and on location in Ohio. The entire film was captured with IMAX-certified Red Digital Cinema cameras. The reported net budget after incentives is around $255 million, making it one of the most expensive superhero films ever produced. The first trailer accumulated 250 million views in 24 hours, second only to Spider-Man: No Way Home for a non-Disney film. The film opened in theaters on July 11, 2025, and its blend of classic Americana with retro-futuristic production design was singled out in early coverage (Motion Picture Association).
Visual effects were supervised by Stephane Ceretti, with Industrial Light & Magic (ILM) and Framestore leading major sequences. Their work ranged from building a digital Metropolis to creating a fully computer-generated Krypto the Superdog.
The AI Metaphor: Lex Luthor and Superman
The connection between Superman and AI in popular discussion comes from a James Gunn interview with Rolling Stone in June 2025. Gunn said he related to Lex Luthor's motivation, explaining: "Lex looks at Superman like artists look at AI. He is the world's greatest man in so many ways. He's done these unparalleled things. And then you got a guy who comes in who's done nothing to deserve the ability to fly and to smash down buildings" (The Fandomentals).
From Lex's perspective, Superman is an unearned miracle. Lex built himself through genius, wealth, and effort; Superman simply absorbed yellow sunlight. The Fandomentals analysis argues that the more accurate real-world comparison is that Lex sees Superman the way some tech entrepreneurs view the artists they believe AI can replace: as a commodity whose output matters more than the humanity behind it. The film ultimately rejects this view, showing that Superman's value lies not in his power but in his compassion, restraint, and willingness to do good.
"What makes Superman special isn't what makes him more than human, much less what makes him not human. On the contrary, what makes Superman special is his humanity." — The Fandomentals
Where AI Actually Helps Filmmaking
While Superman itself is not an "AI movie," artificial intelligence is becoming part of the modern filmmaking toolkit. The most common uses include:
- Previsualization. AI helps directors block complex action scenes before expensive sets or VFX work begins.
- Concept art. Artists use generative tools to explore visual directions quickly, then refine the chosen direction by hand.
- Digital doubles. Machine learning assists in creating realistic virtual actors for stunts or background crowds.
- De-aging and face replacement. AI-driven tools smooth age transitions or replace stunt performers' faces with actors' faces.
- Marketing and localization. AI generates trailers, thumbnails, and translated promotional assets at scale.
These applications are typically invisible to audiences. They speed up production and reduce costs, but they do not replace directors, cinematographers, production designers, or actors. In Gunn's Superman, the creative identity remains firmly human.
Inside the VFX Pipeline: How Superman Was Actually Made
Superman's visual effects were not a single technique but a layered collaboration between practical photography, digital environments, and character work. ILM's Enrico Damm explained that the studio joined the project during pre-production to build a real-time, art-directable Metropolis that director James Gunn and production designer Beth Mickle could iterate on before principal photography (ILM).
Because roughly 70 percent of Metropolis was inspired by New York City, ILM captured helicopter reference photography over Manhattan and built hundreds of unique buildings in sections. This avoided the repetitive, procedural look that can make digital cities feel fake. The environment team at ILM's Sydney studio shared the asset with other vendors so the entire film maintained a consistent city.
Krypto the Superdog was created by Framestore, starting with scans and extensive reference footage of Gunn's dog, Ozu. VFX supervisor Stephane Ceretti noted that Ozu's asymmetrical ears, expressive eyes, and chaotic personality were preserved even as the model was scaled up and recolored for the screen (Motion Picture Association). The result is a CG character that reads as a real dog rather than a cartoon sidekick.
Key VFX Departments and Their Roles
- Production design: Beth Mickle designed the Fortress of Solitude from crystal-growth and wave-impact references.
- Costume design: Judianna Makovsky treated Superman's suit as a uniform, sourcing the S-Shield from the Kingdom Come comic.
- Digital environments: ILM built Metropolis with hundreds of distinct buildings based on New York reference.
- Character animation: Framestore, ILM, and Weta shared the Krypto asset across multiple sequences.
- Compositing and effects: Practical wire work was blended with digital doubles and simulations for flight and fight scenes.
What AI Actually Did on Superman
Despite the public AI metaphor, the film's production used machine learning in narrow, technical ways rather than as a generative shortcut. The clearest example is ILM's FaceSwap pipeline for David Corenswet. Because Corenswet plays both Superman and Ultraman, the crew developed a scanning system to capture his face daily and train a model to replicate his performance on stunt doubles. ILM animation supervisor Paul Kavanagh emphasized that the goal was to stay faithful to the live-action shoot, not to invent a synthetic performance (ILM).
This is a useful distinction. Generative AI creates new images or performances from prompts; machine-learning-assisted FaceSwap transfers a captured performance onto a digital double. The latter is a control tool, not a replacement for acting. It preserves the actor's expression and timing while making dangerous or impossible shots achievable.
Other AI-assisted steps likely included denoising renders, upscaling textures, and motion-capture cleanup, though studios rarely detail every subroutine. The important takeaway is that Superman's AI use was invisible, consent-based, and in service to human performances—not a substitute for them.
Where Practical Effects Still Matter
Despite its scale, Superman relied heavily on physical craftsmanship. Krypto the Superdog, while primarily a visual effect, was 3D modeled after James Gunn's own rescue dog, Ozu. Gunn adopted Ozu shortly after he began writing the film, and the dog's chaotic personality inspired Krypto's role in the story (Onscreen Club).
Anthony Carrigan's Metamorpho required five to six hours of makeup each day, with pieces glued, painted, sewn, and roped onto his body. Carrigan, who has alopecia, said Gunn specifically cast him because he understood what it feels like to be different, bringing authenticity to the character's struggle. These choices show that practical artistry, performance, and personal experience remain central to blockbuster filmmaking.
Superman and the Broader AI-in-Hollywood Debate
Gunn's AI metaphor lands at a tense moment in Hollywood. The 2023 writers' and actors' strikes made generative AI a central labor issue, with unions demanding limits on AI-generated scripts and digital replicas of performers. Studios, meanwhile, see AI as a way to cut costs and accelerate production. Superman sits in the middle of this debate: a film that uses advanced technology but argues, through its story, that humanity cannot be replaced by raw capability.
For audiences, the lesson is simple. The question is not whether AI will appear in films like Superman, but how it is used and who gets credit. When AI supports human vision, it can be a powerful tool. When it displaces human artists without consent or compensation, it becomes the very threat Lex Luthor imagines in Superman.
Frequently Asked Questions
Did James Gunn use AI in Superman?
There is no public evidence that generative AI was used to create the film's visuals or script. AI appears thematically in Gunn's explanation of Lex Luthor's motivation. The production did use machine-learning-assisted tools, such as ILM's FaceSwap training for David Corenswet's digital double, but these support human performances rather than replace them.
What did James Gunn say about AI and artists?
In a Rolling Stone interview, Gunn said Lex Luthor sees Superman the way artists look at AI: as someone who has not earned his gifts yet overshadows those who worked for theirs. Critics noted the metaphor works better if Lex is compared to tech leaders who view artists as replaceable.
Is Superman (2025) mostly CGI or practical effects?
It uses a heavy mix of both. The film features extensive CGI for Krypto, flight, and alien elements, but also relies on practical makeup, real locations, and physical sets.
Who plays Lex Luthor in James Gunn's Superman?
Nicholas Hoult plays Lex Luthor. He was originally considered for Superman and Batman before Gunn cast him as the villain.
What was the budget of Superman (2025)?
Reports vary, but the net budget after tax incentives and rebates is estimated at around $255 million.
What is the main theme of Superman (2025)?
The film explores kindness, humanity, and what makes someone worthy of admiration. It argues that Superman's goodness matters more than his power.
Conclusion
James Gunn's Superman is not a case study in generative AI filmmaking, but it is a timely reflection on what human creativity means in an age of machine-generated media. The film uses advanced CGI and practical effects to tell a story that ultimately defends the value of character, choice, and compassion over raw power.
For creators and audiences, the takeaway is clear: AI is a tool, not a replacement for the humanity that makes stories resonate. To explore more on AI in film and visual culture, visit our Video, Film & Visual AI cluster, including CGI vs AI and Best AI Rotoscoping Tools.