Maybe a little particle animation when the paintball hits something?
That would be hard to implement because to make it look good it has to be random and progressive.
I like the idea, though.
Or we could have something where the paintball hits something, and instead of just splatting as it usually does, it releases
paint particles (not wood, metal, etc.). That would be much easier to do.. Or would it.
Or is that what you were suggesting, zorch?