Set the Seed value to define how much the lightning branches out. The initial Frequency determines how much the lightning will branch out to the left and the right. Set the Amplitude parameter to define how straight the lightning bolts are. The Brightness parameter controls how bright the lightning is. Unlike Width , the trunk and the branches are brightened uniformly.
Opacity controls how transparent the lightning is.
Select the Color you want for your lightning bolt. The default is white. Select the Ambient light that you want for the background image. Darker backgrounds serve to brighten the lightning. To animate the lightning, click the Play button in the Key Frame Control .