How to add motion blur effect to your camera

Hi! I am beginning in unity, and i am making an adventure/horror game.
So i want a motion blur effect to the camera : When the player move, there is blur to the camera.
Sorry for my Englisch, Thanks for your answers!

This requires render textures, which means you must have Unity Pro to do it. If that is the case, there is a built-in Image Effect for it.

I don’t want to say it’s not possible to do without render to texture, but I sure can’t envision how it would be done.