Previous:Adding Some Turbulence to the Fog Main Index Next:Using Multiple Layers of Fog
The much more interesting and flexible fog type is the ground fog, which is selected with the fog_type
statement. It's appearance is described with the fog_offset
and fog_alt
keywords. The fog_offset
specifies the height, i. e. y value, below which the fog has a constant density of one. The fog_alt
keyword determines how fast the density of the fog will approach zero as one moves along the y axis. At a height of fog_offset+fog_alt the fog will have a density of 25%.
The following example (fog5.pov
) uses a ground fog which has a constant density below y=25 (the center of the red sphere) and quickly falls off for increasing altitudes.
fog { distance 150 color rgbf<0.3, 0.5, 0.2, 1.0> fog_type 2 fog_offset 25 fog_alt 1 }
The ground fog only covers the lower parts of the world.'
Previous:Adding Some Turbulence to the Fog Main Index Next:Using Multiple Layers of Fog