All of this texturing squares seems like sooo much work to get around something that should be working as simply as assigning a picture or a movie to be the background. It has worked perfectly for multi-versions and apparently still does if you use Poser 4 render engine. This has got to be a bug. My work around is NOT to change the preview window to fit the background image/movie. Visually distracting yet it does render correctly. Those that use the textured square for backgrounds: Don't you have to parent the square to the camera? Otherwise, your screwed if you change the camera position. No?