Rendering in computer graphics refers to the process of generating a photorealistic or non-photorealistic image from a 2D or 3D model by means of a computer program)). It is the finalization process of a digital image or a 3D model using computer software, which lets users bring together the visuals, from the shadows and lighting effects to the textures, and generate the final result. The resulting image is referred to as the render). Rendering is one of the major sub-topics of 3D computer graphics, and in practice, it is always connected to the others)). It is the last major step in the graphics pipeline, giving models and animation their final appearance)).
Rendering has various uses in architecture, video games, simulators, movie and TV visual effects, and design visualization, each employing a different balance of features and techniques). Some of the types of rendering techniques in digital art include Real-Time Rendering and Pre-rendering. Many rendering algorithms have been researched, and software used for rendering may employ a number of different techniques to obtain a final image). Some of the rendering techniques include Physically based rendering, Radiosity, Ray tracing, and Unbiased rendering).
The technical details of rendering methods vary, but the general challenges to overcome in producing a 2D image on a screen from a 3D representation stored in a scene file are handled by the graphics pipeline in a rendering device such as a GPU). A GPU is a purpose-built device that assists a CPU in performing complex rendering calculations).
