Computer-generated imagery (CGI) is a technology that creates visual content through digital means, enabling the generation of intricate and realistic images or animations. At its core, CGI involves using computer software to model, texture, light, and render three-dimensional objects and environments. This process begins with 3D modeling, where objects are created using geometric shapes and defined by their spatial attributes. Once modeled, these objects are textured to add color, patterns, and surface details, and then illuminated with virtual light sources to simulate how light interacts with the surfaces. Finally, rendering compiles all these elements into a final image or animation, producing a visual output that can be integrated seamlessly with live-action footage or used as standalone content.

The effectiveness of CGI lies in its ability to manipulate and combine various digital techniques to achieve lifelike results. Advanced rendering algorithms simulate realistic effects such as shadows, reflections, and refractions, making CGI visuals appear convincing and immersive. Additionally, motion capture technology often complements CGI by recording the movements of actors or objects, which are then applied to digital models to produce fluid and natural animations. This blend of modeling, texturing, lighting, and rendering allows filmmakers to create visually complex and dynamic scenes, from fantastical creatures and elaborate environments to intricate visual effects that enhance storytelling and audience engagement.