How do i get a background with some transparency in poser. I want my animation to have a transparent background in order to use it as the foreground of a movie :) In fact the background can't be black cos i won't be able to see the background of my movie ... Can anybosy help me ?

Poser creates an alpha channel for its images. If you save your video using a codec that supports alpha, and have a video editing application that supports alpha, you're all set for compositing.

For Windows .avi video, Full Frames (Uncompressed) and Huffyuv compression both have alpha channel support. I don't know about QuickTime.

As an alternative, you could do the compositing in Poser itself, by importing the background image or video and then rendering on top of it.

Attached Link: http://www.thugsatbay.com/

You don't say what video editor you're using to composit your movies, but I've not tried one yet where absolute black (RGB 0,0,0) wasn't the default transparency! It's a colour that should never occur in REAL video, so it's safe to use as a chroma-key. If your video editor doesn't work that way, try downloading Zwei-Stein from Thugs at Bay - url: http://www.thugsatbay.com/ A really ugly interface, but it's free, and there's nothing much you can't do with it.