This short computer animation from 1988 contains a collection of dream sequences created using 3D particle systems techniques. Behavior rules are applied to thousands of individual particles to model complex phenomena such as an explosion, a snowstorm, a tumultuous head, and a waterfall. A Connection Machine CM-2 computer was used to perform physical simulations on thousands of particles simultaneously, one processor for each particle. Director: Karl Sims Audio/Visual: sound, color Keywords: particle systems; animation; computer graphics; waterfall Contact Information: For further technical information see: "Particle Animation and Rendering Using Data Parallel Computation" K.Sims, Computer Graphics (Siggraph '90 proceedings), Aug. 1990, pp.405-413. For information on other works by Karl Sims visit: http://www.genarts.com/karl/