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Real-time Soft Shadows in Dynamic Scenes using Spherical Harmonic Exponentiation

Real-time Soft Shadows in Dynamic Scenes using Spherical Harmonic Exponentiation. MSR, MSRA, DirectX. ray traced. ambient occlusion. SHEXP. approximate blockers as spheres. accumulate low-frequency visibility in SH. g = g [1]* g [2]*…* g [ m ] g [ i ] = vis. of blocker i.

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Real-time Soft Shadows in Dynamic Scenes using Spherical Harmonic Exponentiation

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  1. Real-time Soft Shadows in Dynamic Scenes using Spherical Harmonic Exponentiation MSR, MSRA, DirectX ray traced ambient occlusion SHEXP approximate blockers as spheres accumulate low-frequency visibility in SH g= g[1]*g[2]*…*g[m] g[i] = vis. of blocker i g = exp(f[1] + f[2] + … + f[m]) f[i] = log(g[i]) (a) product space (b) log space use log space to convert expensive product to cheap add real-time results

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