Rendering is the process of converting 3D graphics into 2D images. There are several common rendering methods. Rasterization is commonly used in games and works by determining which triangles in a 3D scene will be visible from a given perspective. Ray tracing creates photorealistic images by simulating the paths of light in a scene, allowing for accurate reflections and refractions, but is difficult to implement in real-time games. Radiosity focuses on global lighting and shadows by tracking how light spreads throughout an environment.