Create panel > Lights > Standard > Target Direct button
Create menu > Standard Lights > Target Directional Light
Directional lights cast parallel light rays in a single direction, as the sun does (for all practical purposes) at the surface of the earth. Directional lights are primarily used to simulate sunlight. You can adjust the color of the light and position and rotate the light in 3D space.
A target directional light uses a target object to aim the light.
Because directional rays are parallel, directional lights have a beam in the shape of a circular or rectangular prism instead of a "cone."
Note: When you add a target directional light, the software automatically assigns a Look At controller to it, with the light's target object assigned as the Look At target. You can use the controller settings on the Motion panel to assign any other object in the scene as the Look At target.
Note: Direct lights are supported in a radiosity solution only if they are pointed downwards, outside the boundary box of the scene geometry.
Note: The mental ray renderer assumes that all directional lights come from infinity, so objects that are behind the direct light object in the Autodesk VIZ scene will also be illuminated. In addition, with the mental ray renderer, directional lights cannot generate area shadows, and do not work with the Beam shader (in the lume library).
To create a target direct light:
To change a viewport to a Light view:
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The name of each spotlight or directional light is displayed in the Views list.
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Choose the name of the light you want.
The viewport now shows the light's point of view. You can use the Light Viewport Controls to adjust the light.
The default keyboard shortcut for switching to a Light viewport is $.
Clicking the line that connects the light and its target selects both objects. However, region selection doesn't recognize the link line.
When you rename a target directional light, the target is automatically renamed to match. For example, renaming Light01 to Sol causes Light01.Target to become Sol.Target. The target's name must have the extension .Target. Renaming the target object does not rename the light object.