create your animation as needed.
when you output your animation be sure to use a format that suports alpha channels such as AVI, or Quicktime.
select “composition” from the upper row of menues ( File. edit. composition) and then “Make movie”
(in this case I’m going with quicktime)
click on “Ooutput Module” (usually on loseless by default) and select format: Quicktime Movie.
then goto the format options button then select Animation. click okay
in the same window that has the “format options” look on he right side and select under channels RGB+Alpha
(this alpha channel gives you the transparency that you are looking for…. select audio options if you need them.. then render…
and with long animations remember the file sizes can get HUGE!!!!
this is by no means the difinative options for rending out … but this should work with a really quick deadline that you mentiond.
Moogurus.. feel free to show a better way.. 🙂