Scalable Height Field Self-Shadowing. - Ville Timonen; Jan Westerholm (Comput. Graph. Forum, 2010)

Low-Complexity Intervisibility in Height Fields. - Ville Timonen (Comput. Graph. Forum, 2012)

Screen-Space Far-Field Ambient Obscurance. - Ville Timonen (High Performance Graphics, 2013)

Line-Sweep Ambient Obscurance. - Ville Timonen (Comput. Graph. Forum, 2013)