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Setting Sky Attributes
Once you've selected a Sky mode, you have the basis for your virtual environment. All the other atmosphere effects you add later will interact with the base mode. There are two other attributes that affect how all the other effects will appear: Shadows and Ambient color.
Shadows in Your Scene
All the objects in your scene cast shadows. Using the Shadow control you can set the intensity and color of all the shadows in your scene.
The shadow control is not the only control for shadows. The position of shadows is dependent on the position of the sun. Since the sky interacts directly with objects in the scene, the color of the sun also affects the color of shadows.
The object's material properties also affect the color of shadows. Semi-transparent or transparent objects with a transparency color will change the color of the object's shadow. As well, volume materials can dramatically change the shape and color of shadows.
By default, the Clouds in Bryce do not cast shadows. If you want the cloud layer to cast shadows on the ground below, enable the Cloud Shadows option. Refer to "Cloud Cover" for more on this option.
To set shadow intensity:
1 Display the Sky & Fog palette by clicking the Sky & Fog button at the top of the Bryce window.
2 Drag left or right inside the Shadow control thumbnail. Dragging left decreases the intensity and dragging right increases it.
The cursor changes to a two headed arrow as you drag over the control.
To set shadow intensity numerically:
1 If it's not already visible, display the Sky & Fog palette by clicking the text item on the menu bar.
Click the Sky Lab button. The Sky Lab dialog appears.
2 Click the Sun & Moon tab to display the Sun & Moon palette.
3 Click the Sun/Moon Shadows field, then enter a value, or drag the slider. This field governs the intensity of shadows rendered in your image. The range is 0 to 100, and the default value is 90.
Ambient Color
The Ambient Color is the color of all the light that surrounds the objects in your scene. Light from the sun interacts with ambient color to produce the color for both highlights and shadows.
Ambient Color is used as the source color for material Ambience. The Ambient Color tints the surfaces of all objects in your scene that have some level of ambience. Any other color you apply to the object's surface is mixed with the Ambient color to create the final surface color. For example, if the Ambient Color is red, any color you assign to an object's surface ambience is mixed with red.
Refer to "Ambience" for more on material ambience.
To set Ambient Color:
For realistic effects, at noon, or in the afternoon, ambient color should be a little blue to get nice blue-ish shadows. At dawn, you can set Ambient Color to red or pink, and at night you can set it to gray-blue.
You can also set the ambient color by using the Ambient color swatch in the Sky Lab.
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