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Rendering is the process involved in the generation of a two-dimensional or three-dimensional image from a model by means of application programs. Rendering is mostly used in architectural designs, video games, and animated movies, simulators, TV special effects and design visualization. The techniques and features used vary according to the project. Rendering helps increase efficiency and reduce cost in design.
There are two categories of rendering: pre-rendering and real-time rendering. The striking difference between the two lies in the speed at which the computation and finalization of images takes place.
For these rendering types,the three major computational techniques used are: