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Computer Graphics in Film. Rafael Sabino 9/14/2004 Topics in Computer Science. My Purpose. Give a general idea of how computer graphics special effects are done in movies The Perfect Storm:

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Computer Graphics in Film

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computer graphics in film

Computer Graphics in Film

Rafael Sabino


Topics in Computer Science

my purpose
My Purpose
  • Give a general idea of how computer graphics special effects are done in movies
  • The Perfect Storm:
    • Portrays the struggles of a six man crew on the Andrea Gail caught in a meteorological phenomena called the perfect storm.
  • Why is the movie important in graphics?
    • Until then, no studio tackled so much digital water in so many forms
    • Water is one of the most difficult objects to create and make look realistic
    • Company that created the digital effects was Industrial Light and Magic (ILM)
how much did it take
How much did it take?
  • A crew that grew to be about 120 people
  • It took about 14 months to create a total of 340 shots
  • 250 shots or about 30 minutes of the film include digital water
  • 100-foot by 92-foot tank and a full sized model of the Andrea Gail
  • Among others
the film process how is it done
The Film Process – How is it Done?
  • After a production studio decides to make a film, they choose a director, which in turn chooses a special effects company
  • Once this is decided, the film process starts
  • First step is to create a story and/or the script
  • From the script, the special effects team creates storyboards
  • A collection of still drawings, words and technical instructions that describe each shot.
  • A typical film has an average of 2000 shots!
the film team divides and conquers
The Film Team Divides and Conquers
  • Different groups are created, among these are:
    • Sets Designers (design and construct sets)
    • Research and Development
the film team divides and conquers continued
The Film Team Divides and Conquers (continued)
  • Stunt Team
  • Physical Effects Team (prepares anything not CG)
  • Wardrobe
  • Camera, lighting, and sound equipment
  • Once all teams are divided, the film crew enters the production stage
  • Production: the process of filming live-action shots
  • It involves actors and stunts people working on site or on set to get all of the footage
post production
  • Once production finishes, post-production starts
  • What happens here?
    • Parts of the film where effects need to be added are digitized
    • Creation of shots where CG and live action are combined
    • Creation of shots which contain miniature models and CG
post production continued
Post-Production (continued)
  • All CG Shots are rendered
  • Stunt shots get touched up to remove wires, etc.
  • Shots get cleaned and color corrected
  • The entire film gets amalgamated from all of the shots
  • Film gets mastered, duplicated, sent to a theater near you!
ilm s role in the film process
ILM’s role in the Film Process
  • Upon reaching an agreement with the director, ILM chooses its visual effects supervisor for the project
  • A crew of 120 was assembled for the 340 shots of the film
ilm s role storyboards and animatics
ILM’s Role: Storyboards and Animatics
  • The film is carefully planned out, shot by shot, to match the overall vision director has for film
  • Storyboards are used
  • Animatics: insures director planned shot will work
ilm s role cg shots
ILM’s Role: CG Shots
  • Total of 340 shots were created
  • 90 of the shots where completely CG
  • 220 have CG water or another CG element
ilm s role water effects
ILM’s Role: Water Effects
  • ILM’s job was to simulate all water effects closely enough so that artificial water could be conglomerated with real water realistically
  • A good understanding of how air, water, and solid objects interact with each other was essential for the realism of the movie
ilm s role water effects20
ILM’s Role: Water Effects
  • In addition to studying the physics of water, the team observed and annotated how light affects its appearance
  • Once all background research was done, an ocean water simulator was created to emulate the ocean water found in the movie
ilm s role water effects21
ILM’s Role: Water Effects
  • Basic fluid dynamic simulation provided the foundation for the body of the ocean
  • Most 3D modeling work was done using off the shelf software called Maya
  • About 30 plug-ins written in C++ where created for this movie
ilm s role water effects22
ILM’s Role: Water Effects
  • Multiple particle systems were created to ape the complex physics of the ocean
  • A collision model was created to dictate what particles should do when colliding with themselves or other objects
  • Shaders were used to create the look of the CG environment
  • In some shots, billions of particles had to be created
putting it all together
Putting It All Together
  • A shaded version of the Andrea Gail
putting it all together24
Putting It All Together
  • The colored and textured version of the Andrea Gail
putting it all together25
Putting It All Together
  • The simulated ocean
putting it all together26
Putting It All together
  • Run off from wave crashing over the boat
putting it all together27
Putting It All Together
  • A wave of particles created by the boat’s movement in the water
putting it all together28
Putting it All Together
  • Splash created by boat crashing into wave
putting it all together29
Putting It All Together
  • The lighting model
putting it all together30
Putting it All Together
  • Frame of final shot with all layers put together
moral issues
Moral Issues
  • How far will technology go?
    • Some fear that technology will replace humans as it gets more sophisticated