Hey,
for all of you who didn't grab the demo fast enough:
Thorsten (tkunze) has been kind enough to allow me to upload the demo to his website! He should post the link to the download when he gets a chance. Thank him for this

Also, as Slin said, the lights ARE customizable in real time. In fact, they are not movable on a path, but can be moved quickly by the user (hold down right mouse)! Please read the directions/readme! There is a reason why I wrote it.

Slin, you are right about the aliasing, however, it might be possible to adjust the texture storage to be able to store such large distances (and squared distances) such as using a rgba32bit texture and using 2 channels (64bits!) for each value. This should be similar to a 4 byte double variable.

-Mike-