POV-Ray : Documentation : 2.3.2 Atmospheric Effects
  POV-Ray 3.6 Documentation Online View Camera Identifiers Atmospheric Media

2.3.2 Atmospheric Effects

Atmospheric effects are a loosely-knit group of features that affect the background and/or the atmosphere enclosing the scene. POV-Ray includes the ability to render a number of atmospheric effects, such as fog, haze, mist, rainbows and skies. Camera Identifiers Atmospheric Media

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