Point Light Parameters
 
 
 

The Point Parameters are located in a point light’s Control Window (see Use the Control Window).

Decay

Controls how quickly light intensity decreases with distance. The Decay setting has no effect at distances less than 1 unit.

The Decay parameter works differently for volume lights (see Decay). Valid settings are 0, 1, 2 or 3. The default setting is 1.

0 no decay; light reaches everything
1 light intensity decreases directly (linearly) with distance (slower than real world light)
2 light intensity decreases proportionally with the square of distance (the same as real world light)
3 light intensity decreases proportionally with the cube of distance (faster than real world light)