Frequency Domain Fog Simulation

Authors: 

Alireza Entezari, Soleil Lapierre, Haris Widjaya

We explored the practical tradeoffs and benefits of doing physically accurate fluid flow simulation and fog/smoke simulation in Fourier space. We succeeded in implementing an incompressible Navier-Stokes fluid solver that works entirely in the frequency domain. Output is visualized using the Fourier Volume Rendering technique. We found that a physically accurate flow solver is prohibitively expensive in the frequency domain, and that simulation stability is more difficult to achieve than in the spatial domain. We also implemented two lighting effects within the Fourier Volume Rendering pipeline: linear shading and cylindrical light beams.