How do I make the spotlight's cone Halo not go through objects?

Or, if for some reason it’s not possible, what’s a good way to get the same effect without spotlight Halos?

http://img97.imageshack.us/img97/896/ex2s.png

Edit:
Buffer shadows stop it properly, but it leaves an ugly shadow… What now?
Edit:
Someone else helped me on skype.

This is a good question. Help out others present and future who may run into this same issue. Please tell us the answer and mark this thread [Solved].

Thanks :slight_smile:

The distance adjust wont work ?