One way to "correct"  the problem is to do your rendering in Poser, save the image as a .tiff.  Then in Vue create an Alpha plane and click on billboard.  That will flip the plane that will always face the camera.  Then, click on the top image square and load your image, the bottom image square will automatically show the figure mask shape.  You will need to do a little extra work and ensure that the lighting is from the same angle as the lighting in Poser.  The 2D figure generated will cast a shadow.  Jan