The Ethics of AI in Hollywood: Actors vs. Digital Replicas

The 2023 SAG-AFTRA strike marked a turning point in entertainment history. While residual payments were a major factor, the most futuristic and contentious issue was the use of Artificial Intelligence. For the first time, actors faced the very real possibility of competing against digital versions of themselves. This article breaks down the specific technologies involved, the “digital twin” clauses in the new contracts, and what this means for the future of filmmaking.

The Technology: From CGI to Generative AI

To understand the fear, you must understand the hardware and software. Hollywood has used CGI for decades, but the new wave of AI is fundamentally different.

Volumetric Capture and Photogrammetry

In the past, animators manually built 3D models. Now, studios use volumetric capture stages. An actor stands in a rig surrounded by hundreds of high-resolution cameras. These cameras fire simultaneously, capturing the actor’s geometry and skin texture from every angle.

This process creates a hyper-realistic “asset” that can be manipulated. Light Stage technology, developed at the USC Institute for Creative Technologies, is the industry standard here. It captures how skin reflects light, allowing a digital version of an actor to be relit in any virtual environment.

NeRFs and Deepfakes

The leap that terrified the union involves Neural Radiance Fields (NeRFs) and generative AI. Unlike traditional 3D scanning, these technologies learn from existing footage. By feeding an AI hours of film involving an actor, the software can generate entirely new performances without the actor stepping on set.

Companies like Metaphysic, which partnered with talent agency CAA in 2023, are at the forefront of this. They gained fame for “Deep Tom Cruise” on TikTok. Their technology allows for real-time face swapping, meaning a stunt double could perform a scene while the AI overlays the lead actor’s face seamlessly in post-production.

The "Background Actor" Controversy

One of the most specific and alarming points raised during negotiations concerned background actors (extras). The union reported that studios proposed a system where background performers would be scanned for a single day’s pay.

Under that proposal, the studio would own the digital scan of that extra. They could then populate crowd scenes in future movies with that digital likeness for eternity, without paying the actor another dime or asking for consent.

For a background actor making the standard rate (often around $180 to $200 for an 8-hour day), this represented an existential threat. If a studio builds a library of 10,000 digital extras, the entry-level jobs in Hollywood effectively vanish.

The New Rules: Defining "Digital Replicas"

The agreement ratified in late 2023 established concrete definitions to protect performers. The contract splits digital use into two distinct categories.

Employment-Based Digital Replica (EBDR)

This refers to a replica created in connection with a specific job the actor was hired for.

  • Consent: The studio must obtain clear, conspicuous consent to create the replica. It cannot be buried in a general contract.
  • Scope: The studio can use this replica for the movie it was made for. If they want to use it for a sequel or a different project, they must bargain for new payment and consent.

Independently Created Digital Replica (ICDR)

This is a replica created using existing material, like archival footage, rather than a new scan.

  • Consent: The studio must get permission to create this.
  • Payment: If the AI is used to create a “performance” (meaning the digital actor is doing acting work, not just walking in the background), the actor must be paid as if they were on set.

High-Profile Cases and Precedents

Several recent productions highlight why these rules were necessary.

  • Indiana Jones and the Dial of Destiny: Disney and Lucasfilm used an AI system called “FaceSwap” (developed by Industrial Light & Magic) to de-age Harrison Ford. They fed the AI decades of footage from the old Indiana Jones films to map a younger face onto Ford’s current performance.
  • The Mandalorian: For the return of Luke Skywalker, a body double performed the scene. A company called Respeecher used AI to synthesize a young Mark Hamill’s voice, while visual effects artists reconstructed his younger face.
  • Black Mirror: The episode “Joan Is Awful” featured Salma Hayek’s digital likeness being used against her will (within the show’s plot). This fictional scenario aired right before the strike and became a rallying cry for the dangers of unchecked contractual terms regarding likeness rights.

The Voice Acting Frontier

Visuals get the headlines, but voice actors are perhaps the most vulnerable. AI voice synthesis has become incredibly cheap and accurate.

The “James Earl Jones” Model

Before retiring from the role of Darth Vader, James Earl Jones signed an agreement with Lucasfilm and the Ukrainian startup Respeecher. He gave consent for the AI to learn his voice patterns from early Star Wars films. This allows the studio to generate new Darth Vader dialogue for shows like Obi-Wan Kenobi even after the actor has stepped away or passed on.

This was a consensual, paid deal. The fear among working voice actors is that they will lose jobs to “sound-alike” AIs generated from stock libraries. The new SAG-AFTRA contract now requires that if a digital voice replica is used, the human it is based on must be compensated.

Frequently Asked Questions

What prevents a studio from using an AI version of a deceased actor?

The new contract requires consent from the deceased performer’s estate or authorized representative. If the actor died before these technologies existed, the estate holds the bargaining power. However, “docudrama” exceptions exist where historical figures can be depicted without estate permission, though this is legally complex.

Can an actor sell their digital rights forever?

Technically, yes, but the union advises against it. Some actors are exploring this as a revenue stream. Musician Grimes, for example, offered to split royalties 50⁄50 with anyone who creates a successful AI song using her voice. However, for SAG-AFTRA members, the union contract ensures that specific consent is required for each new project, preventing a “blank check” ownership of their face.

Does this ban AI in movies?

No. Studios can still use AI for visual effects, cleanup, or creating alien creatures. The restrictions apply specifically to “digital replicas” of recognizable human performers. If a studio creates a completely synthetic human that does not look like a real person, they generally do not need to pay a human actor for that “role.”