Discreet today began shipping combustion 2, a new version of its animation and 3D composting software. Among the new features in version 2 is 64-bit image processing, advanced film grain tools, a fully integrated 2D particle system, and state of the art rotoscoping technology. Combustion 2 is available for the introductory price of US$3,495 and will sell for $4,995 come February.