Not sure why you're asking about Blender, unless it's a typo.

You can attach an AVI to any material in Poser, and as such, also on a square in the back as Miss Nancy suggests. Depending on the length of the movie and the size you're rendering in, it may be taxing to your computer - or not.

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.