Hello all again. I have a surprise. I discovered a better way to do it. and it works And now it's smooth animation. Instead of making the BG black in poser, i make it white. Then save my movie as Quicktime with Animation compression type. With MIllions of colors+ chosen. Then that's it. The transparency works in FCut. I didn't know it but it does I can put my poser movie in a track , then a background image on another video track and the poser movies bg is transparent so it looks excellent Here is a picture of what i achieved. And it moves smoothly. it's a quicktime movie saved out of Fcut with Animation compressor type