Fx rain

From MovieBattles II Wiki

DESCRIPTION

This world effect will spawn rain globally into the level.

KEYS&VALUES

count - The number of rain particles (default of 500).

NOTES

Use misc_weather_zone and inside out side brushes to control where Fx_rain plays.

http://www.map-review.com/index.php?page=tutorial_view&id=14

Be sure to check out the outsideBias worldspawn keyword if you're using weather effects in your map, or they may not behave properly in MBII RC2 and up!