Control Light Properties

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Control Light Properties

 

Render a Drawing for Presentation > Add Lighting to Your Model > Adjust and Manipulate Lights > 

Control Light Properties

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Concept

Procedure

Quick Reference

To set attenuation in a point light or a spotlight

1. Click Render tab Lights panel Lighting Units drop-down Generic Lighing Units.

   No lighting units are used and standard (generic) lighting is enabled.

   NoteAlternatively, you can enter lightingunits at the command prompt and set the value to 0 for standard (generic) lighting.
2. Click View tab Palettes panel Properties.
3. In the drawing, click the light glyph.
4. In the Properties palette, under Attenuation, set Use Limits to Yes, or select a type of attenuation:
   • None. Sets no attenuation. Objects far from the point light are as bright as objects close to the light.
   • Inverse Linear. Sets attenuation to be the inverse of the linear distance from the light. For example, at a distance of 2 units, light is half as strong as at the point light; at a distance of 4 units, light is one quarter as strong. The default value for inverse linear is half the maximum intensity.
   • Inverse Square. Sets attenuation to be the inverse of the square of the distance from the light. For example, at a distance of 2 units, light is one quarter as strong as at the point light; at a distance of 4 units, light is one sixteenth as strong.
5. If you set Use Limits to Yes, enter the following values in the properties palette or use the grip tool in the drawing to set the limits:
   • Start Limit Offset. Specifies the point where light starts as an offset from the center of the light. The default is 0.
   • End Limit Offset. Specifies the point where light ends as an offset from the center of the light. No light is cast beyond this point.