Picture in Picture. If I could find a way to better stabilize the 'screen' unit I could incorporate it into my overlay to allow tournaments to watch two things that are happening at once while capturing video from only one computer.
Very annoyingly. You are still looking at units, there are no dialogs in the video.
I wish I could find a better system. I have also asked about RTT in dialogs on the bnet forums in a different thread from yours...hopefully with two threads with different wording we are more likely to get a response.
0-6 is 1-7. In m3 file they are encoded as 0-6 (none as -1). In Max and triggers they named 1-7. In cse they are 0-6 again, becuase the guy who worked on cse isn't the same guy who created that trigger or art tools plugin. There is no reason to get bothered :)
One thing I think is important. I've looked over all the briefing screens in the cutscene editor and if indeed there is no way to change what channel they connect to then you can only make cutscenes that use channels 0-2 as there appears to be no screens that render channels 3-6.
Haven't seen any of them since then, but blizz guys will definitely come to chat right after hots released, so anyone who understands anything about cutscene could ask. (I never tried to do anything in cs, so I'm not the one to ask something related).
I've experimented a bit more, and must regretfully state that the models we play within dialogs doesn't show RTT texures.
I don't know much about UI, but I think they are jsut the same as dialogs in terms of what they can and can't do. So, there is, for example, no difference between a portrait we visualize in UI or in a dialog, none would show RTT texture.
So, looks like the only way to show RTT is to create a cutscene in a dialog, and use one of the units-in-game cameras. And the later seem rather impossible (orm aybe someone cse-competent could try it?).
maybe if we could somehow duplicate the world panel and make it work then we could do that, but as far as i know that is impossible to do, and if it were possible it would only show the players camera, however you could do some really cool stuff with it.