Attached Link: http://www.youtube.com/watch?v=G3nRA4-jstc&feature=plcp

There is a good video tutorial called  

Streaming light or "God rays" effect - a 25 minute tutorial by David Brinnen  

You can find it at the attached link at the top of this post....

Hope it is helpful for you....

 

Wade

There are 10 kinds of people: Those who know binary, and those who don't. 

A whiner is about as useful as a one-legged man at an arse kicking contest.