A slow-motion CG explosion created with 3ds Max, FumeFX and RealFlow. The explosion is a complex, multi-source expanding FumeFX smoke simulation followed by a violent expanding FumeFX fireball, all of which are sourced within the geometry of a building and funnel out thru the building's windows and doors. There are additional details created by explosively expanding RealFlow fluid sims, from which FumeFX smoke and fire is emitted. The physical parameters on the explosion dynamics, such as gravity and turbulence detail, were carefully animated to achieve the full explosion behavior of onset, expansion, and buoyant rise, over a specific timeframe required by the length of the piece. Rendering was done using the FumeFX volumetric renderer. Simulation time for the full-res explosion was about 35 hours and took up 16 gb of RAM.
Additional layers of debris -- the glass and wood fragments of the window and window frames -- are not shown here but were simulated in Maya using BlastCode.