How to leave a mark on the pavement? (:p)

I would like to leave a mark where my balls hit the pavement. Can anyone tell me the best way to do this and where to look?

What you are looking for is a decal.

Dastardly Bananas uses a Decal Manager in their FPS weapons script kit. You can hack this to make it work.

http://www.dastardlybanana.com/FPSConstructorWeapons.htm

I've also written a small, easy-to-use decal script here:

http://forum.unity3d.com/viewtopic.php?t=60229

This might help you, as well.