atmosphere [N] [atmosphere effects]This keyword is used to re-define the "air" (the default atmosphere). If given N is the atmosphere's index of refraction (see section 6.3 of the Rayshade User's Guide for details).
The various atmosphere effects are detailed below.
atmosphere [N] fog Red Green Blue x y zCreates a (coloured) fog effect; (x y z) defines the "thinness" of the fog (see section 6.2 of the Rayshade User's Guide for details).
atmosphere [N] fogdeck altitude offset x1 y1 z1 ChaosScale Red Green Blue x2 y2 z2A "low-altitude" fog - try it out! (x1 y1 z1) defines the scale, (x2 y2 z2) defines thinness.
atmosphere [N] mist Red Green Blue x y z bottom scaleSimilar to fog, see section 6.2 of the Rayshade User's Guide for details.
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THE END - Notes on Rayshade - 3 - Atmospheric Effects