An SL3 file shall be an MP3 file that the Second Life client will play only to the client (aka: you, and not the person next to you). The SL3 file, when finished streaming, will stop. This file will override any stream from the land. Any land stream would start up again after the SL3 stops.
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Imagine if you will, you are in 'SimCast' or 'DarkLife', you wear your backpack and a stream plays ;"http://foo.com/intro.sl3". When it is done, it starts playing "http://foo.com/background.sl3". You walk out into the open and a rat spies you. Your controlling object plays "http://foo.com/fight_rat.sl3". You beat the rat quickly. When done you hear "http://foo.com/background.sl3" playing again.
Later a fight with a monkeypig (superevil, late level creature) takes a long time. During the entire time that a flag says you are fighting a monkeypig (regardless of whether it is the first monkeypig or one of many in a murder of monkeypigs) Second Life streams "http://foo.com/fight_mp.sl3". It repeats for as long as you are in the monkeypig fighting state.
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Now, imagine you go to someone's build that is based on video games (ahem *mushroom kingdom* ahem). You walk or fly in and the normal background mp3 play. You click on a poster explaining the ET fiasco that brought down Atari. As soon as the ET notecard pops up, the ET theme from the game, or any Spike Jones tune, starts playing. When you close the notecard (keep or discard) the tune stops and you are brought back to the parcel mp3.
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Imagine you create a small parcel dedicated to the glorious band the Shaggs. You are listening to NO land music. When you click on a poster you here "http://foo.com/shaggs_footfoot.sl3". You hear enough then close the notecard. The stream stops.
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Second life is a neat idea and I love it, but until we get a better control of multimedia, it cannot become the next internet. I think that having sl3 streams, which are just RENAMED mp3 files that Second Life client can control through events, will help to bring Second Life closer to being a place where folk can exist and share ideas, rather than a place where you can go to watch pole dancers.
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LL: If you haven't already done so, create a user group of SL residents who show the most promise in redefining the environment. I can't wait till one day I can go to "Kotter", a sim entirely based on 70's TV; or go visit "Poppy" a sim based on horror and vampire literature . And these sims would grow UP and DOWN., meaning that the world could keep it's shape and grow as more interests were added, but there would be no shortage of space.
