Houdini test project I did in my free time. I wanted too see how my home computer would handle a huge particle count. 20 million particles rendered in about 1hr. All data processed at render time and all sims and particles were cached, the pyro sim took the longest to sim and cache. and the particle cache took up the most space about 20gigs for 120 frames . Houdini is extreamly powerful and very robust.