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A Tighter Quantization Bound for the Spherical Harmonic Projection of Non-Negative Functions
Spherical harmonic approximations for games are often stored as a high precision DC component and a lower precision set of higher-order components. Here we use the non-negativity of lighting functions to derive a tight bound on the ratio of higher order components (in terms of the order) to the DC component. This allows us to more efficiently store higher order components.
Read the full Technical Memo HERE