Studios Use CGI to Replace Paul Walker, Philip Seymour Hoffman

Hollywood productions will use CGI to resurrect the actors in their upcoming films.
3:00 | 03/23/14

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Transcript for Studios Use CGI to Replace Paul Walker, Philip Seymour Hoffman
. A recent sudden deaths of two Hollywood stars have sent Hollywood studios skramtbling. With Paul walker in fast and furious 7, and Philip Seymour Hoffman in the hunger games. And they are looking to come up with solutions to complete crucial scenes. Do they have the technology and how will audiences respond? We are in Los Angeles with more. Reporter: Good morning. This is a scenario Hollywood faced many times over the years. James dean, Clark gable, Marilyn Monroe all passed away before finishing a film project. Back then they would do their best with body doubles. But today they have a much better option. Maybe it was you who inspired me to come back. Reporter: Coming back to the big screen. Actor Philip Seymour Hoffman will live on after dying before filming was completed. What are you smiling about. Reporter: And now we're learning so will Paul walker in the fast and furious 7 -- I'm not going anywhere did. Reporter: After it was believed it would have to be dropped after too many untaped scenes. But they will use special effects, replacing the act we are a computer-generated image of him. The technology advanced to the point they can do things, actors that wasn't possible before. Reporter: Cgi technology is used to put a new face on actors. It's how army hammer played twins in the social network. How Natalie portman danced in black swan. And even how Audrey help burn was resurrected for this dove chocolate ad. But using it after a tragic death raises ethical questions. The big question is whether you can tell. If it's a scene you know is not real, it gives you a weird feeling when you're watching it president studio's going to be very careful to make this a seamless process. I'm sure we'll meet again. Reporter: When cgi is used, the deceased actors families are consulted and scripts are change. Walker's ending will be a happy ending, one thing to make audiences feel comfortable. It's important to reach out to the families in advance for permission. Interesting how cgi is a staple in Hollywood. Thank you. Meanwhile, Sara? Coming up on "Good morning

This transcript has been automatically generated and may not be 100% accurate.

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