Raindrops Camera Distrsion

Is it possible to add in Unity Free the following effect or something similar :

Outside is raining, your face (camera) is full of raindrops and those raindrops distorsionate your image,preview like :
alt text

I want to create this effect in my horror game, I think it would be nice.
Thank You.

P.S. I couldn’t find any answer on this theme.

Your face is not a camera, and, unless you wear glasses, you will not get raindrops distort your vision…

Anyways…no image effects in Unity Free, but you could parent a plane in front of the camera and add the distortion that way.