9

Sunlight and Daylight Systems 421
Manual Over ride (Daylight system only)—When on,
you can manually adjust the location of the sun
object in your scene, as well as the intensity value
of the sun object.
Az imuth/Altitude—Displays the azimuth and
altitude of the sun. Azimuth is the compa ss
directionofthesunindegrees(North=0,
East=90). A lt itude is the height of the sun above
the horizon in degrees (Sunrise or Sunset=0).
Time group
Provides settings for the time, date, and time zone.
If the location you choose uses Daylight Savings
Time, turn on the Daylight Saving Time checkbox.
The Sunlight system adjusts the sun’s azimuth and
altitude accordingly during the summer months.
Hours/Mins/Secs—Specify the time of da y.
Month/Day/Year—Specify the date.
Time Zone—Time zones range from –12 to 12. If
you’reuncertainaboutatimezone,youcanlook
them up in Window’s Date > Time Properties
dialog (available through My Computer > Control
Panel > Date > Time). Click the Time Zone tab,
and then display the list of world locations and
their time zones.
Daylight Savings T ime—When on, calculates
daylight savings by adjusting azimuth and altitude
during the summer months.
Location group
Provides controls for setting the location of your
scene in the world.
Get Location—Displays the Geographic Loca tion
dialog (page 1–422), which lets you set the latitude
and longitude values by selecting a location from
a map or a list of cities.
Note: For precise locations, ente r exact coordinates
using Latitude/Longitude.
[city na me t ex t b ox]—Displaysthenameofthecity
you choo se from the Geographic L ocation dialog.
If you adjust the Latitude or Longitude spinners
after choosing a location, this area b ecomes blank.
Latitude/Longitude—Specify the location based on
the latitude and longitude.
Site group
Orb it al S cal e—Sets the distance of the sun (the
directional light) from the compass rose. Because a
directionallightcastsparallelbeams,thisdistance
has no effect on the accuracy of the sunlight.
However, the light must point toward your model
(not away from it), and the light’s hotspot and
falloff do have an effect.