God rays effect
Cast rays of light from the top of the screen. This won't work well if shown on top of the background color of the scene. Be sure to use an object acting as a background or a floor.

The angle and the Center X/Center Y properties define where the rays come from and their direction. Disable the parallel property to make the rays spread out from the center point (like a sun) instead of staying parallel. Set the Animation Speed to make the rays shimmer over time, and use gain and light to adjust their strength.
Note
This is a 2D effect. It has no effect on 3D objects or 3D layers.
Reference
All effects are listed in the effects reference page.