Reference > Tools > Reaction Tool > Working with Lights > 

Setting Light Properties

 
 
 

You can set basic lighting properties for all light types.

To set basic lighting properties:

  1. On the Lights tab, under Basics, enter values to define the light.
Properties Description
Color Sets the color for the light. Click the color pot to display the color picker, choose a color, and click Set—see Color Picker.
Intensity Sets the amount of light emitted by the source light.
Decay Sets the light's intensity to diminish gradually using a linear or quadratic function.
1/2 Distance Represents the distance at which the light's intensity is reduced by half.
Time Dilation Modifies the motion blur that affects lights animated in your scene. You can set the Time Dilation factor to give the light the appearance of moving at a different speed than is set for Motion Blur in the Render tab.

You can modify the properties for Spotlights and Directional lights.

To set attributes for a Spotlight:

  1. Select the Lights tab.
  2. Under Light Type, select the Spotlight light type.
  3. Set the Spotlight properties.
    Properties Description
    Shape The shape of the light can be a circle or rectangle.
    Hot Spot Angle The angle where the solid cone of full intensity light ends and a gradual fading begins.
    Cutoff Angle The angle at which the light ends.
    Aspect The aspect ratio of the spotlight shape.

To set properties for a directional light:

  1. Select the Lights tab.
  2. Under Light Type, select the Directional light type.
  3. Adjust the Radius field to set the radius of the light. This value is also used to delimit the size of the shadow map.
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