getSphericalHarmonics
Parses the key="sh" metadata into result: 3 bands of spherical harmonics, 9 RGB coefficients (27 floats).
Return
false if the metadata is missing or malformed
Parses the key="sh" metadata into result: 3 bands of spherical harmonics, 9 RGB coefficients (27 floats).
false if the metadata is missing or malformed