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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.
.. include:: sky_shared.rst
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