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Open: Select a Sky Preset from disk.
Save: Save the current sky from disk, for use as a preset later.- Atmosphere Intensity: Control the brightness of the sky independently from the sun. Sun and atmospheric intensity may be adjusted independently when Multilight is enabled.
- Sun: Enables / disables direct sunlight. This parameter is linked to the lights ‘Shadows’ button in the Lights palette. If disabled, only ambient sky light will illuminate the scene.
- Power: Specifies the light output of the sun as a multiplier, where a value of 1 is equivalent to the the Earth’s sun. (i.e., A value of 2 would be twice that of the Earth’s sun, while a value of 0.5 would be half that of the Earth’s sun.)
- Radius Factor: The size of the sun; where a value of 1 is equivalent to the the Earth’s sun. Increasing this value allows for softer shadows.
- Temperature: Specifies the temperature of the sun’s spectral radiation, in degrees kelvin. The default value of 5777ºK is the most common value measured outside the Earth’s atmosphere.
- Planet Reflectance: Specifies the percentage of light reflected from the planet surface back into the atmosphere. Changing this value will brighten / darken the overall sky and scene illumination with lower values giving a darker result. Common values are 26-32%.
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