Tryptofaa Sands built an amazing SL camera device that follows you wherever you go, cutting between angles to get the best point of view, and it's a brilliant tool for SL machinima makers, because it looks like this:
As the video mentions, there are no cuts or post-production edits to this video, for what you see is what you get. It was so impressive that when I first saw this video, I assumed they had built a roving camera system to make it work.
Not so says, Tryptofaa, not so:
"[B]asically it makes use of llCastRay to find positions with an unobstructed view of your avatar and allows the user to prioritize their preferred camera angles for automatic changes and use keyboard shortcuts to switch between camera groups," Mr. Sands tells me.
llCastRay is a fancy heavy duty ninja term, so I asked Mr. Sands how exactly that worked: