Computer-generated imagery (CGI) is the process of creating CGI graphics using specialized computer-generated imagery software. This technology is widely used in CGI rendering, including 3D CGI, CGI product rendering, and CGI architecture. CGI is essential for industries such as film, gaming, advertising, engineering, and architecture, where high-quality CGI renders and animations enhance visual storytelling and product presentations.
Unlike traditional animation techniques like hand-drawn cartoons or stop-motion, CGI rendering relies on computers to generate CGI renderings in both 2D and 3D CGI formats. This technology allows for the creation of complex CGI visualisierung and CGI content, enabling lifelike environments, realistic textures, and high-quality effects in movies, video games, and virtual reality applications.
Modern CGI technology supports everything from render CGI for architectural visualization to CGI product rendering for e-commerce. Whether it’s for film special effects, digital prototypes, or immersive experiences, the CGI rendering meaning continues to evolve, shaping the way digital media is produced and consumed.
What is CGI Technology?
The question “When was CGI invented?” can be traced back to the 1960s when various inventors and companies experimented with the new and developing world of computer animation. Much of this was two-dimensional in scope, but it was already being used in disciplines such as science, engineering, and later, medicine.
As CGI technology evolved, so did the ways filmmakers used it in their movies, making them some of the first films with CGI in the film industry. They could create digital viewpoints in Westworld (1973) and wireframe models in Star Wars (1977) and Alien (1979), although its use and scope were still limited at the time. The role of CGI expanded even further in the 1980s with films like Tron (1982), The Last Starfighter (1984), and Young Sherlock Holmes (1985), where the technology was used to create full-fledged models of real objects and realistic characters.
How Does CGI Work?
Therefore, when people in cinema and the film fandom talk about CGI technology today, they almost always mean its use in visual effects (VFX). This may include 3D models of people, monsters, buildings, cars, explosions, and many other things. These 3D models are then placed into real-world scenes, such as when a monster attacks a city or a car explodes. Such CGI effects have become commonplace and are often found in high-budget productions.
CGI can also be seen in films as diverse as historical dramas and sci-fi blockbusters. In a historical drama, for example, it can be used to fill locations with era-appropriate details, as well as to maintain scene consistency, meaning background environments filled with buildings, people, and vehicles. In a sci-fi blockbuster, CGI may account for nearly 90% of everything you see, from characters and vehicles to environments and action.
How is CGI Made?
This timeline gives you key examples of CGI and shows how the technology has evolved over the decades. From something minor in Westworld to something all-encompassing in Toy Story and even to recent superhero hits like Spider-Man: Into the Spider-Verse and Avengers: Infinity War.
It is important to understand and consider where CGI started and how it evolved, especially if we are going to discuss any controversies related to its use.
What Does CGI Stand For in the Film Industry?
In the last ten to twenty years, a loud voice has emerged among viewers tired of the poor use of CGI, criticizing the technology. It has even reached the point where people (still) ask why CGI is used instead of practical effects.
Bad CGI is certainly a problem in some films, but as is often said in this very popular and well-made video below, the best type of CGI is the one you don’t even notice.
CGI is also no longer limited to massive blockbusters. If you’re making a sci-fi movie but with minimal visual effects, perhaps you can use CGI where it is truly necessary. Or maybe you want to recreate something you have seen but think you lack the resources—when, in reality, you do have them.
Many films with CGI use this technology to create things they could never achieve otherwise. James Cameron’s films are known for their CGI, as this technology made the T-1000 possible in Terminator 2 (1991). It also made Titanic (1997) even more spectacular through the use of CGI models alongside real sets. More recently, Avatar (2009) showcased Cameron at the peak of his visual mastery, using various visual effects combined with CGI to create a unique experience.
Main Use Cases and Examples of CGI
CGI software became an essential tool in the 1990s and has continued to evolve since then. Today, these software applications are used across various industries beyond entertainment. The main use cases include the following:
- Film Special Effects. CGI effects are becoming increasingly realistic and can be used for tasks such as adding elements to a background or environment—for example, weather conditions—as well as modifying a character’s physical appearance. A well-known example is James Cameron’s Terminator 2, which introduced groundbreaking special effects, including liquid metal.
- Video Game Graphics. 3D computer graphics in video games use techniques like rasterization, which employs polygons—typically triangles or quadrangles—to model 3D objects. Rasterized 3D graphics render scenes in real time, and the results can be either photorealistic, with photographic precision, or non-photorealistic, depending on the desired style.
- Advertising. Commercials and advertisements use CGI to market products in an engaging and visually compelling way. The cost of CGI production has significantly decreased, and creation methods have become more efficient, allowing even small businesses to market their products using high-quality CGI visuals. In addition to video formats, static images can achieve similarly impressive results.
- Architectural Models. In real-world applications, CGI specialists collaborate with clients to create 3D models of exterior and interior spaces. These models can be highly photorealistic and accurately depict how buildings will look before construction even begins.
What is CGI Animation?
No area of cinema has embraced this technology as extensively as fully animated CGI films. Stop-motion animation was a widely used style for a long time, even as many animated movies were still hand-drawn. It was the closest that filmmaking got to three-dimensional animation, but it required a significant amount of time and effort to produce. Moreover, the process was highly labor-intensive, as stop-motion requires meticulous frame-by-frame planning for each movement that appears on screen.
Soon, computers began to dominate the field of hand-drawn and stop-motion animation with CGI technology. This advancement allowed filmmakers to create fully three-dimensional worlds that were not restricted by real-life filmmaking environments. Additionally, computer animation enabled filmmakers to achieve either extreme realism or complete fantasy with their work.
Pixar was among the first to experiment with fully computer-generated animation, as seen in the studio’s early short films. Toy Story (1995) became known as the first fully CGI-animated feature film, which alone made it significant. However, the movie was also a critical and financial success, earning recognition as one of the greatest animated films of all time and inspiring beloved sequels.
Future Trends and Innovations in CGI
The field of CGI (computer-generated imagery) is constantly evolving, and several emerging trends and innovations are set to shape its future direction. These advancements have the potential to revolutionize various industries and push the boundaries of visual storytelling. Let’s explore some key CGI trends and possibilities.
Real-Time Rendering
Real-time rendering is a significant breakthrough in CGI technology, allowing complex 3D scenes to be visualized instantly. Traditionally, rendering high-quality CGI images or animations required significant processing time. However, with real-time rendering techniques such as ray tracing and rasterization, artists can receive near-instant feedback, making the design process more interactive and iterative. Real-time rendering is especially crucial in industries such as gaming, architecture, and virtual reality, where fast and immersive visualization plays a key role.
Virtual Production
Virtual production merges physical and digital elements in real-time, offering a new way to create movies, TV shows, and commercials. By using advanced CGI technology, such as real-time rendering, motion capture, and virtual reality, virtual production allows filmmakers to visualize and shoot scenes in virtual environments. This approach offers greater flexibility, cost efficiency, and creative control in the production process. Directors and cinematographers can make real-time adjustments, experiment with different camera angles, and seamlessly integrate CGI elements into live-action footage.
Holographic Displays
Holographic displays are set to transform the way audiences experience visual content. These displays use techniques such as light diffraction to create the illusion of three-dimensional images floating in space. As holographic display technology advances, exciting new possibilities for interactive and immersive storytelling emerge. Whether in museums, advertising, entertainment, or education, holographic visuals can create captivating and engaging experiences for viewers.
Advancements in Photorealistic CGI
The pursuit of photorealism in CGI is driving continuous technological innovation. As computing power and CGI software capabilities grow, CGI-generated visuals are becoming increasingly indistinguishable from reality. Advanced rendering techniques such as physically based rendering (PBR), global illumination, and accurate material representation contribute to achieving stunning levels of visual realism. This is particularly important for industries like film, advertising, automotive design, and product visualization, where realistic CGI images are essential for communicating ideas, showcasing products, and creating immersive experiences.
Artificial Intelligence and Machine Learning
The integration of AI (artificial intelligence) and ML (machine learning) into CGI is unlocking new possibilities. AI-powered algorithms can automate and streamline various aspects of the CGI process, including object recognition, motion tracking, and facial animation. Machine learning models can also be trained to generate procedural textures, realistic simulations, and even automated character animation. These AI-driven capabilities not only save time and resources but also open up new creative avenues for artists and designers.
Augmented Reality (AR) and Mixed Reality (MR)
AR and MR technologies combine virtual and real-world elements, overlaying digital content onto the physical environment. As these technologies advance, they will have a major impact on industries such as architecture, retail, education, and entertainment.
- In architecture, AR can be used to visualize proposed buildings in existing landscapes, allowing clients and stakeholders to assess designs in context.
- In retail, AR can enhance the shopping experience by enabling customers to virtually try on products or see how furniture would look in their homes.
The integration of CGI into AR and MR will create interactive and immersive experiences that blend digital and physical worlds.
These new CGI trends and innovations hold immense potential for transforming industries and expanding the boundaries of visual storytelling. From real-time rendering and virtual production to holographic displays and photorealistic CGI, the future of CGI promises to deliver even more immersive, interactive, and visually stunning experiences.