|
|
|
|
Animating Skies
All the properties of a Bryce sky can be animated. This means that any attribute you can set in the Sky & Fog palette or the Sky Lab dialog can be animated using the Animation controls on the Timeline.
This section assumes that you're familiar with the concepts and procedures involved in creating skies. Refer to "Creating Skies" for more on creating skies.
By changing the attributes in the Sky & Fog palette at different points in the timeline, you can animate everything from the position of the sun to the color of the clouds.
There are several techniques you can use to add motion to your skies. You can animate all or some of the properties of your sky. You can activate and deactivate sky effects at different points in the animation. You can also animate the position of the sun or moon.
Sky animations are created using the Animation tools in the Working window and the Sky Lab dialog.
Animating Sky & Fog settings
Animating Sky & Fog settings changes the properties of a sky over time. For example a scene can become cloudier, or darker during an animation. The intensity of the change depends on how many properties you adjust and the amount of each adjustment.
Most Sky & Fog properties can be changed using the thumbnail controls. Other settings are available in the Sky Lab dialog.
You won't be able to see the effects of a sky animation until you render the entire animation.
To animate Sky & Fog settings:
1 Click the triangle icon in the Animation controls and make sure Auto-Key is enabled.
2 Move the Current Time Indicator to the point in the Timeline where you want the sky to change.
3 Adjust the sky's properties using the Sky & Fog palette controls.
4 Move the Current Time Indicator to a different point on the Timeline.
5 Change the properties of the sky again.
6 Continue moving the Current Time Indicator and changing the sky's properties until you achieve the desired effect.
Animating Clouds
You can create the effect of wind in your environment by setting up cloud motion parameters. Based on your settings, Bryce automatically moves the clouds in your environment to create motion.
Cloud motion parameters are set in the Sky Lab dialog.
To animate clouds:
1 Click the triangle icon in the Animation controls and make sure Auto-Key is enabled.
2 In Sky & Fog palette, click the Sky Lab button. The Sky Lab dialog appears.
4 Move the direction indicator in the Cloud Motion controls to set a direction for the clouds as they move in the animation.
5 Adjust the speed control to set how fast the clouds move. You can also enter a speed value.
6 Adjust the Turbulence control to set how much the clouds will distort as they move. You can also enter a turbulence value.
Animating Environmental Effects
Many environmental effects like rainbows and fog are not permanent features of a sky. They appear for a brief time and then fade way. You can simulate this action by changing the properties of the environmental effects at different points along the Timeline.
Environmental effects controls are located on the Atmosphere tab of the Sky Lab dialog. You can also animate the various settings for an effect. For example, the radius of moon rings can increase or decrease during the course of your animation.
To animate environmental effects:
1 Click the triangle icon in the Animation controls and make sure Auto-Key is enabled.
2 Move the Current Time Indicator to the point in the Timeline where you want the sky to change.
3 Display the Sky Lab dialog: Atmosphere tab and change the properties of an effect.
4 Move the Current Time Indicator to a different point on the Timeline.
5 Change the properties of the effect again.
6 Continue moving the Current Time Indicator and changing the effect's properties until you have the desired effect.
Animating Sun or Moon Position
One of the most spectacular effects you can create using the scene's sky is elapsed time. In the great outdoors we perceive time in relation to the position of the sun and the brightness of the sky. By changing the position of the sun or moon you can simulate time passing in terms of days or months.
Since all the elements in the sky are linked, the other properties of the sky like Ambient Light change as the position of the sun changes, adding to the realism of the effect.
For the moon, you can also change its phases, so you simulate the passage of an entire month just by adjusting the moon attributes.
To animate Sun or Moon position:
1 Click the triangle icon in the Animation controls and make sure Auto-Key is enabled.
2 Move the Current Time Indicator to the point in the Timeline where you want the sky to change.
3 Adjust the position of the sun or moon using the Sun Position control in the Sky & Fog palette.
4 Move the Current Time Indicator to a different point on the timeline.
5 Change the position of the sun or moon again.
6 Continue moving the Current Time Indicator and changing the sun or moon position until you achieve the desired effect.
 Corel Corporation http://www.corel.com Voice: (800) 772-6735 Fax: (716) 447-7366 www.corel.com/support |