Stochastic Billboard Clouds for Interactive Foliage Rendering. - J. Dylan Lacewell; David Edwards; Peter Shirley; William B. Thompson (J. Graph. Tools, 2006)

Packet-based whitted and distribution ray tracing. - Solomon Boulos; David Edwards; J. Dylan Lacewell; Joe Kniss; Jan Kautz; Peter Shirley; Ingo Wald (Graphics Interface, 2007)