Graphics Programs Reference
In-Depth Information
Figure 20.16 Light Source Definition dialog box
The light distribution patterns have different properties. The spherical and
hemispherical distributions have the basic settings for size and photometric
data, while the spot distribution has additional settings for the tilt angle
and beam spread. The photometric web distribution has a parameter for
tilt angle and one to define the light source by a photometric (IES) file.
The properties of the light source distribution are all associated with type
parameters of the fixture family. Figure 20.17 shows the properties of a
light source with a spot distribution. Notice that the parameter values are
mapped to family parameters (indicated by the = to the right side of the
parameter value).
Figure 20.17 Light source properties
 
 
 
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