Fluids and dynamics simulation... <br /><br />"RealFlow has been used for the production of spectacular effects in numerous major movies. These include Primeval, 300, Meet the Robinsons, Poseidon, X-Men 3 (The last stand), Charlie and The Chocolate Factory, Lord of the Rings: The Return of the King, and Ice Age 2 (The Meltdown) to name but a few. It has also been used to produce effects for countless commercials and television products worldwide." <br /><br />Source : <a class="link" rel="nofollow" href="http://www.nextlimit.com/realflow/">http://www.nextlimit.com/realflow/</a>