Computer-generated imagery (CGI) refers to the creation of still or animated visual content using computer software. It is widely used in various fields, including film, video games, and advertising, to produce realistic images and effects that would be difficult or impossible to achieve through traditional methods. CGI allows artists and designers to create detailed 3D models, environments, and characters. By manipulating light, texture, and movement, CGI can enhance storytelling and visual experiences, making it a crucial tool in modern media production, especially in blockbuster films like those from Pixar or Marvel.