Fast Approximation of Multiple Scattering in Inhomogeneous Participating Media Szirmay-Kalos László
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GI in Participating Media
Direct term only Direct term only
Resampling of the result at voxels
Assumes spherical symmetry
Fast Approximation of Multiple Scattering in Inhomogeneous
Participating Media
Szirmay-Kalos László
Liktor Gábor
Tamás Umenhoffer
Tóth Balázs
GI
in Participating Media
Importance of approximate solutions
Real-time
visualization
Bootstrap for an “accurate” method
Monte Carlo (main part separation)
Iteration (initial state)
Direct
term only
Direct term only
Homogeneous case, diffusion approx.
Spherical layers: algorithm
Ray marching
for sample directions
Resampling of the result at voxels
Results: head
Conclusions
Fast approximation of the
global illumination solution
Assumes spherical symmetry
Cost is
the same as of the direct term
Computes also the scattered term
Applications
Fast visualization
Initial
state for a precise solver
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