Hi guys, my proyect is getting me crazy! i´ve been looking on youtube trying to found a solution for the waterfall and do it as real as I can do it.

What you think is the best way?

http://www.youtube.com/watch?v=zaO5-gpZJ6I

http://www.youtube.com/watch?v=qNgMQgwh3bg&feature=channel

http://www.youtube.com/watch?v=8SUgoMJhO1I&feature=related

I really like the last one, but i´m not sure