The new tech making movie car stunts more realistic | BBC News
By BBC News
Key Concepts
- Virtual Production: A filmmaking technique that combines live-action footage with computer-generated imagery (CGI) and other digital elements, often using LED screens to display virtual environments.
- LED Volumes: Large, curved LED screens that display real-time CGI environments, allowing actors and cameras to interact with a virtual world as if it were physically present.
- Robotic Motion Platform: A sophisticated mechanical system that can simulate the movements of vehicles (cars, helicopters, boats, planes) with high precision and customization.
- Game Engine: Software used to create video games, which can also be adapted for real-time rendering of 3D environments in virtual production.
- Air Casters: Devices that use compressed air to lift and move heavy objects, enabling the easy repositioning of LED walls.
- Hovercraft Walls: LED walls mounted on air casters, allowing for effortless movement and adjustment.
Pixelondo's Advanced Virtual Production for Realistic Driving Scenes
This video explores the cutting-edge virtual production techniques employed by Pixelondo, a visual effects studio known for its work on projects like Star Trek and House of the Dragon. The focus is on their innovative approach to creating highly realistic driving scenes, moving beyond traditional methods like green screen and on-location filming.
Revolutionizing Driving Scene Realism
Pixelondo has deployed a new studio that integrates state-of-the-art graphic controls with a sophisticated robotic platform. This combination aims to eliminate the artificiality often perceived in movie driving scenes, making them more convincing for audiences.
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Limitations of Traditional Methods:
- Green Screen: Suffers from issues like incorrect light reflections and unwanted green light bouncing onto the vehicle.
- On-Location Filming: Presents logistical challenges such as high insurance costs, the need to shut down streets, and the risk of exposing high-profile actors to public streets.
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Advantages of LED Volumes: The adoption of LED volumes is increasing due to their ability to overcome the drawbacks of older techniques.
The Customizable Robotic Motion Platform
Central to Pixelondo's innovation is a highly customizable robotic platform designed to simulate vehicle motion.
- Functionality: The platform can replicate virtually any movement, including bumps and spins, with on-the-fly editing capabilities. Directors can request immediate adjustments, such as adding a "jerk" or an "extra bump," which can be implemented quickly.
- Rotation Capabilities: Currently, the platform supports up to eight full rotations. A forthcoming upgrade will enable unlimited rotations, a feature that is unique to this motion platform and highly anticipated for its potential in dynamic scenes.
- Versatility: Beyond cars, the platform can accommodate other vehicles like helicopters, boats, and planes, making it suitable for simulating complex aerial or maritime maneuvers, such as a helicopter spinning out.
Enhancing Actor Performance
The platform's realistic motion directly benefits actor performances.
- Natural Reactions: The suspension control, in particular, allows actors to react more authentically to the car's movements, reducing the need for them to "fake" their reactions. This leads to more believable portrayals.
Dynamic 3D Environments via Game Engines
The massive LED panels within the studio display 3D graphics rendered using game engines, offering directors unprecedented control over the virtual environment.
- Environmental Control: Directors can manipulate various elements in real-time, including:
- Sun Position: Adjusting the time of day.
- Traffic Lights: Triggering specific traffic light sequences.
- Scene Population: Controlling the number of cars and pedestrians in the scene via sliders.
- Content Ownership: The use of game engines allows for greater creative ownership and direct control over the 3D scene, enabling adjustments to car speed and path.
The Crucial Role of Reflections with Hovercraft Walls
Achieving realistic reflections is identified as a key secret to making virtual scenes appear as if filmed outdoors.
- Hovercraft Walls: The LED walls are designed to be mobile, operating on air casters. This technology allows them to be lifted by compressed air, enabling two people to easily move heavy (up to 10,000 lbs) wall sections into precise positions.
- Strategic Reflection Placement: These movable walls are crucial for capturing accurate reflections from various angles, mimicking how light would interact with a vehicle in a real-world environment. This is particularly important for elements like car windshields, where specific angles of reflection are needed to enhance realism.
Industry Adoption and Future Outlook
The adoption of virtual production is growing, though some cinematographers may initially be hesitant to move away from traditional filming methods.
- Education and Experimentation: The industry is seeing a gradual shift driven by education and hands-on experimentation with these new technologies.
- Cost and Time Considerations: The expense and time commitment associated with virtual production can be a barrier for some productions.
- Hybrid Approaches: For now, high-budget films often combine outdoor filming with studio-based virtual production to achieve the most believable settings.
- Evolving Technology: As technology continues to advance, films created using these methods are expected to become increasingly indistinguishable from reality, making them more believable and immersive for audiences.
Conclusion
Pixelondo's advanced virtual production studio, featuring a highly customizable robotic motion platform and dynamic LED volumes powered by game engines, represents a significant leap forward in creating realistic cinematic experiences, particularly for driving scenes. The ability to precisely control motion, environments, and reflections, coupled with the enhanced actor performance, is transforming the filmmaking landscape and promising even more believable visual storytelling in the future.
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