Rendering techniques are methods used in computer graphics to create images from 3D models. These techniques convert the data of a model, including its geometry, textures, and lighting, into a 2D image. Common rendering techniques include ray tracing, which simulates the way light interacts with objects, and rasterization, which converts 3D objects into pixels for display on screens. Different rendering techniques can produce varying levels of realism and detail. For instance, real-time rendering is often used in video games to ensure smooth performance, while offline rendering is used in movies for high-quality visuals. Each technique has its own advantages and is chosen based on the specific needs of a project.