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Encyclopedia > Distance fog

Distance fog is a technique used in 3D computer graphics to enhance the perception of distance. The rewrite of this article is being devised at Talk:3D computer graphics/Temp. ... Depth perception is the visual ability to perceive the world in three dimensions. ...


Because many of the shapes in graphical environments are relatively simple, and complex shadows are difficult to render, many graphics engines employ a "fog" gradient, so that objects further from the camera are progressively more obscured by haze. This technique works because of light scattering, which causes more distant objects to appear hazier to the eye, especially in outdoor environments. In computer graphics, rendering is the process of generating the pixels of an image from a high-level description of the images components. ... Diffraction is the apparent bending and spreading of waves when they meet an obstruction. ...

Example of fog
Example of fog

Fogging is another use of distance fog in mid to late nineties games, where processing power wasn't enough to render far viewing distances, and clipping was employed. However, the effect could be very distracting, and by applying a medium-ranged fog, the clipped polygons would fade in more realistically from the haze, even though the effect may have been considered unrealistic in some cases. Racing and some Nintendo 64 games used this effect. Image File history File links This computer generated image tries to show distance fog effect in a wikipedia article. ... Image File history File links This computer generated image tries to show distance fog effect in a wikipedia article. ... // Events and trends The 1990s are generally classified as having moved slightly away from the more conservative 1980s, but keeping the same mind-set. ... When rendering graphics, clipping refers to the task of making sure that only the visible part is actually drawn. ... A racing game is any game that involves competing in races through a surrogate playing piece or vehicle, either getting it from one point to another or completing a number of circuits in the shortest time. ... The Nintendo 64, commonly called the N64, is Nintendos third home video game console. ...


See also: computer graphics, virtual reality Computer graphics (CG) is the field of visual computing, where one utilizes computers both to generate visual images synthetically and to integrate or alter visual and spatial information sampled from the real world. ... Virtual reality (abbreviated VR) describes an environment that is simulated by a computer. ...


  Results from FactBites:
 
Distance fog - Wikipedia, the free encyclopedia (196 words)
Distance fog is a technique used in 3D computer graphics to enhance the perception of distance.
Fogging is another use of distance fog in mid to late nineties games, where processing power was not enough to render far viewing distances, and clipping was employed.
However, the effect could be very distracting, and by applying a medium-ranged fog, the clipped polygons would fade in more realistically from the haze, even though the effect may have been considered unrealistic in some cases.
The Gnomon Workshop - Simple Fog (718 words)
The Saturation Distance is expressed in terms of grid units from the rendered camera view.
The Saturation Distance is set to the same depth as the Near clip to create a sharp wall of fog.
Additionally, a Fog Near/Far value clips the start of the fog to be a few units from the camera with the Saturation Distance also a few units from camera.
  More results at FactBites »


 

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