That doesn’t seem to be the problem. They were rendered premultiplied. I just tried every combination including rendering a file straight, and the edges are still blocky. When I open the file in the viewer, it looks fine. It is only when I import it into my timeline that it looks bad in the canvas window. If I double click on it in the timeline and open the graphic in the Viewer window that way, it also looks blocky. It almost looks like the resolution goes way down, but my sequence settings are the same as the QT movie.