The science of spherical harmonics at Weta Digital Posted by Mike Seymour ON April 25, 2013 Spherical Harmonics are an invaluable tool for production rendering, and also a common device used in games, but few really understand them and how they are used. Spherical Harmonics (SH) are a data representation, nothing more. But like a Fourier transform, the SH data transformation has been allowing incr