QCDesktop displays Quartz Compositions on your Mac OS X Tiger desktop.
Your desktop image is given the life of Quartz Compositions that can display any kind of animated art; a blue sea, an RSS feed, a clock.
QCDesktop imports settings from the Screen Saver preferences database. To modify composition settings, open the Screen Saver preferences panel, select the composition and click "options…".
You can jump directly to the screen saver preference pane by selecting "Composition Options…" in the QCDesktop menu.