Skip to Content

Demo: Hollywood’s Master of Light

USC’s Paul Debevec shows how to use light from the real world-and algorithms from the digital one-to render an actor’s face as it would appear under any conditions.

A sunny beach. A candlelit restaurant. A creepy dungeon. In the world of moviemaking, directors increasingly use digital tools to add real and virtual characters to different kinds of backgrounds. The key to making it look realistic? Lighting. “How actors are lit is a big deal,” says Paul Debevec, a computer scientist who heads the Graphics Laboratory at the University of Southern California’s Institute for Creative Technologies. By creating more accurate artificial lighting on a computer, he says, his team is “giving filmmakers more flexibility” in their shots and more efficient ways to generate effects. Which means time and money saved on shooting, editing, and drawing graphics-not to mention more convincing results. An eventual goal is to create more realistic digital characters and objects that can be used in any scene. But techniques based on Debevec’s work have already been used by special-effects companies in numerous feature films, including the Matrix and X-Men series. At his lab in Marina del Rey, CA, Debevec showed TR associate editor Gregory T. Huang how to use light from the real world-and algorithms from the digital one-to render an actor’s face as it would appear under any conditions, anytime.

Deep Dive


Embracing CX in the metaverse

More than just meeting customers where they are, the metaverse offers opportunities to transform customer experience.

Identity protection is key to metaverse innovation

As immersive experiences in the metaverse become more sophisticated, so does the threat landscape.

The modern enterprise imaging and data value chain

For both patients and providers, intelligent, interoperable, and open workflow solutions will make all the difference.

Scientists have created synthetic mouse embryos with developed brains

The stem-cell-derived embryos could shed new light on the earliest stages of human pregnancy.

Stay connected

Illustration by Rose Wong

Get the latest updates from
MIT Technology Review

Discover special offers, top stories, upcoming events, and more.

Thank you for submitting your email!

Explore more newsletters

It looks like something went wrong.

We’re having trouble saving your preferences. Try refreshing this page and updating them one more time. If you continue to get this message, reach out to us at with a list of newsletters you’d like to receive.