Atmosphere
GenesisII implements an advanced atmospheric model that realistically reflects the way that light is diffracted and absorbed by our atmosphere. These controls are used to set atmospheric and environmental effects - see also the Clouds controls.

Atmospheric Effects

• Ambient: Ambient light intensity. Ambient light has been scattered and comes from no particular direction.
• Diffusion: Diffuse light intensity. This is light coming directly from the sun but is scattered on reflection and does not create highlights.
• Atmospheric Scatter: Controls how much the direct sunlight is scattered to form the blue of the sky.
• Atmospheric Glow: Controls the amount of glow around the sun.
• Shadow Depth: Controls how dark cast shadows are.
• Mist Density: General atmospheric mist/haze.

Sun Position

These control set the altitude and azimuth position of the sun. You can click and drag directly on the blue dial controls or use the edit boxes.

Colors

• Sun: The color of the sun. Usually this is set to white or a very light yellow, but can be set to redder tones for sunsets.
• Sky: The background sky color at the zenith. Blends with the horizon color towards the horizon.
• Horizon: Sky color at the horizon.
• Mist: Mist color.

Advanced Parameters

These parameters control how the atmosphere is modeled and should only be altered from the defaults with care.

• Atmospheric Ceiling: The top of the atmosphere. Light traveling above this will not be affected by atmospheric physics. Also effects the behavior of light below the ceiling. Default value is 200.0.
• Atmospheric Floor: Nominal bottom of the atmosphere. Default is -100.0.
• Atmospheric Control Distance: Nominal distance to the sky. Default is 250.0
• Infinity: Nominal infinite distance. Default is 10000.0