Tree Bend Factor Doesn't Work, Unity 3.

I'm not a pro or anything and it may be NOT the best way but it worked for me:
-Make sure you don't have any object selected.
-go to Game Object > Create Other > WindZone.
-Drag your WindZone to your Terrain (making WindZone Child of Terrain).
-Make your Wind Zone Spherical
-size your Wind Zone to cover all your terrain

Now you may investigate Wind Zone values. In my case i set them as following:
Wind Main = 1
Wind Turbulence = 0.01
Wind Pulse Magnitude = 1
Wind Pulse Frequency = 0.2

Hope it Helped.

unfortunately nobody seems to care around here....

Me too want to know solution for this! ;)

Try creating an empty object, then applying a wind zone to it ... place the empty object near the tree and adjust the wind settings/radius to ensure the wind hits the tree.

@DW-MM: i copy paste from your's comment :)

@Capper: Or you can set with this:

1. Game Object > Create Other > WindZone

2. Drag your WindZone to your FPC(making WindZone Child of FPC)

3. Set Wind Zone Mode = Spherical

4. Set your's WindZone properties until you look fine (runing game status)!