9

274 Chapter 18: Effects and Environments
The Environment and Effects dialog is
displayed, with the Environment panel visible.
2. Under Atmosphere on the Environment panel,
click Add.
The Add Atmospheric Effect dialog appears.
3. Choose the kind of effect you want to use, and
then click OK.
The effect has now been added. Use the
Atmosphererollouttoadjustparameters.
Inter face
Common Parameters rollout
Background group
Co lor—Sets the color for the scene background.
Click the color swatch, then select the color you
want in the Color Selector. You can animate the
color effect by changing the background color at a
nonzero fra me with the Auto Key button on.
Environment M ap—The button for Enviro nment
Map (page 3–934) displays the name of the map, or
“None” if none has been assigned. The map must
use Environmental mapping coordinat es (page
3–967) (spherical, cylindrical, shrink wrap, and
screen).
To assign an environment map, click the button
and use the Material/Map Browser to choose a
map, or drag a map from a sample slot or map
button in the Material Editor (or anywhere else in
the s of tware; for example, a Projector Map button)
anddropthemapontheEnvironmentMap
button. A dialog asks if you want the environment
map to be a copy (independent) or an instance of
thesourcemap.
Note: If your scene includes animated
bitmaps, including materials, projector lights,
environments,andsoon,theanimationfileis
reloaded once per frame. Rendering performance
slows down when your scene uses multiple
animations, or the animations are themselves large
files.
To adjust the environment map ’s parameters,
forexampletoassignabitmaporchangethe
coordinate settings, open the Material Editor, drag
theEnvironmentMapbutton,anddropitoveran
unused sample window.
Use M a p—Uses a map for the backg round rather
than the background color.
Global Lighting group
Tint—Tints all lig hts in the scene (except for
ambientlight)ifthiscolorisanythingotherthan
white. Click the color swatch to display the Color
Selector, on which you can choose the tint color.
You can animate the tint color by changing it at a
nonzero frame with the Auto Key button on.
Level —Multiplies all lights in the scene. A Level of
1.0 preser ves the ori ginal, individual light settings.
Increasing the Level raises the lighting for the
overall scene, and decreasing the Level lowers the
overall lighting. This parameter is animatable.
Default=1.0.
Ambient—Sets the color for the ambient light.
Click the color swatch, and choose the color you
want in the Color Selector. You can animate the
lighteffectbychangingtheambientlightcolorata
nonzero frame with the Auto Key button on.