Simple Sky

Sky model that implements atmospheric scattering and lighting according to the Sam O’Neil GPU Gems article.

Example usage:

<map>
    <options>
        <sky driver               = "simple"
                         hours                = "0.0"
             ambient              = "0.05"
                             atmospheric_lighting = "true"
                             exposure             = "3.0"  />

Properties:

atmospheric_lighting:
 

Whether to apply the atmospheric scattering model to the scene under the Sky node. If you set this to false, you will get

basic Phong lighting instead.

exposure:

Exposure level to apply to the scattering model, which simulates the wash-out effect of viewing terrain through the atmosphere.

Common Properties:

hours:Time of day; UTC hours [0..24]
ambient:Minimum ambient lighting level [0..1] to apply to dark areas of the terrain