Johannes Günther Heiko Friedrich Ingo Wald Hans-Peter Seidel Philipp Slusallek Ray Tracing Animated Scenes using Motion Decomposition. 517-525 2006 25 Comput. Graph. Forum 3 http://www.eg.org/EG/CGF/volume25/issue3/v25i3pp517-525.pdf db/journals/cgf/cgf25.html#GuntherFWSS06