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Double buffer in GWorlds?



Hi all,

What i'm trying to do is to open two movies at the same time and
trying to render them in the same window at the same time. (one
overlapping part of the other).
What I tried to do is to assign the same GWorld (the default window
port) to the two pictures. Of course it didn't work.
What i have thought is that if I can create two Gworlds and assign
each Gworld to a movie and after i have the Gworld rendered, render
them to the default window port. I think this would be very slow and
probably the video output won't be nice because probably I would need
a double buffer in order to make the render smooth. So if anyone knows
or have an idea to make it as efficient as possible, please reply i
would be very granted. (Although I don't know if i can play two movies
at the same time)

Another question: is it possible to put text or images over a movie?

Thank you and happy christmas to everybody.
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