Rendering is the process involved in the generation of a two-dimensional or three-dimensional image from a model by means of application programs. It 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. Also, it helps increase efficiency and reduce cost in design.

There are two categories of rendering: pre-render and real-time render. The striking difference between the two lies in the speed at which the computation and finalization of images takes place.

  • Real-Time Render: The prominent rendering technique using in interactive graphics and gaming where images must be created at a rapid pace. Because user interaction is high in such environments, real-time image creation is required. Dedicated graphics hardware and pre-compiling of the available information has improved the performance of this category.
  • Pre-Render: This rendering technique is used in environments where speed is not a concern and the image calculations are performed using multi-core central processing units rather than dedicated graphics hardware. This technique is mostly used in animation and visual effects, where photorealism needs to be at the highest standard possible.

For these types of render,the three major computational techniques used are:

  • Scanline
  • Raytracing
  • Radiosity