Encyclopedia > Computer rendering

  Article Content

Computer rendering

In 3D computer graphics, rendering is the process of drawing a 2D image, based upon a description of a three-dimensional scene (which may include geometry and material properties). It is a slow, computationally intensive process (typically for moviecreation) or supported by realtime 3D hardware accelerators in graphiccards (typically for 3D computer games). The term is by analogy with an "artist's rendering" of a scene.

When the pre-image (a wireframe sketch usually) is complete, rendering is used, which adds in textures, lights, bump mapping, and relative position to other objects. The result is a completed image the consumer or intended viewer sees.

For movie animations, several images (frames) must be rendered, and stitched together in a program capable of making an animation of this sort. Most 3-D image editing programs can do this.

There are a number of different phenomena that need to be simulated when rendering a scene:

All of these effects can be summed up in a single 'rendering equation' that contains very complex constants that in effect encode the scene.

All 3-D rendering software and hardware produces an approximation to a solution of the idealised rendering equation. Slow moviecreation software typically use more realistic rendering equations than realtime 3D hardware accelerators.

Methods of rendering include:

Movietype rendering often takes place on a network of tightly connected computers called a render farm.

The current state of the art in 3-D image description for movie creation is the RenderMan scene description language[?] designed at Pixar. (compare with simpler 3D fileformats such as VRML or APIs such as OpenGL and DirectX tailored for 3D hardware accelerators).

Movie type rendering software includes:

Fill in research - image based rendering, non photorealism, etc.

External links:



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
French resistance

... contacts with the maquis. Francs-Tireurs et Partisans[?] (Français) (FTP or FTPF) – Formed by French communist[?] party and ended up as the military wing of Front ...

 
 
 
This page was created in 23 ms