2009

[city name text box] Displays the name of the city you choose from the
Geographic Location dialog. If you adjust the Latitude or Longitude spinners
after choosing a location, this area becomes blank.
Latitude/Longitude Specify the location based on the latitude and longitude.
NOTE Negative longitude values are west of the Greenwich meridian; positive
values are to the east of the meridian. This differs from versions prior to Autodesk
3ds Max 2009, in which the polarity of longitude values was incorrectly reversed.
North Direction Sets the rotational direction of the compass rose in the scene.
This is the geographical orientation of the compass rose. By default, north is
0 and points along the positive Y axis of the ground plane. Positive X (East)
is 90 degrees. Adjust the North Direction to correspond to your site. Accuracy
of the system depends on this correspondence.
Model Scale group
Orbital Scale Sets the distance of the sun (the directional light) from the
compass rose. Because a directional light casts parallel beams, this distance
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.
The best way to ensure that the light is set up correctly is to change one
viewport to the light's view (for example, Sun 01). Then adjust the light's
location using
Dolly on page 7616, and set the hotspot so it illuminates the
whole model, with no falloff.
Daylight System Dialogs
Configure Weather Data Dialog
Create a Daylight system. > Create or Modify panel > Daylight Parameters
rollout > Position group > Choose Weather Data File. > Click Setup. > Configure
Weather Data dialog
Create a Daylight system. > Motion panel > Control Parameters rollout >
Choose Weather Data File. > Click setup button. > Configure Weather Data
dialog
5148 | Chapter 18 Lights and Cameras