Directional light comes from a source that is infinitely far away from the model. It is a columned light source consisting of parallel rays from a single direction. You can modify the intensity, color, and position of the light source.
To display this PropertyManager, in the DisplayManager, click View Scenes, Lights and Cameras 
. Under Lights, right-click Directional and select Edit Directional Light.
When the PropertyManager appears, a manipulator
appears in the graphics area. To move the light or the target in the graphics area, move the pointer over the manipulator. When the pointer changes to
, you can drag the manipulator.
Basic Tab - Light Position
Press Tab to flip the light source 180 degrees about the model origin.
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Lock to model |
Maintains the position of the light relative to the model. When cleared, the light remains fixed in the model space. |
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 Longitude  Latitude
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Sets the location of the light in the coordinate system. |
PhotoView Tab - PhotoView Controls
The PhotoView tab is available when PhotoView is added in.
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On in PhotoView |
Turns on the light in PhotoView. The light is off by default. Also enables PhotoView lighting options. |
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PhotoView brightness |
Sets the brightness of the light in PhotoView. |
PhotoView Tab - Shadows
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Shadows |
Enables shadows in PhotoView. |
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Shadow softness |
Sharpens or softens the shadow cast by the light. Lower values sharpen shadows. Higher values soften them but may affect rendering times. To simulate the effect of the sun, experiment with values between 3 and 5.
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Shadow quality |
Reduces graininess in softer shadows. As you increase Shadow softness, experiment with higher values of this setting to reduce graininess. Increasing this setting increases render times.
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