Ironically, I already am planning on rescuing my other old tutorial and redo it. It involves dust/smoke effect lamp. I’ll make a new post with it when it’s published.
made_a_lamp: For some reason, the ray mirror doesn’t reflect halo as far as I know, but there is a work around for now, use Envmap instead to render a mirror, it will render the laser you have right now.
DreamMaster, this looks like it’d be a great tutorial (and it’s just what I need for my current project), but upon clicking the link, I get a page saying: