   Spherical Hamonic Lighting Paper
  I'm reading Spherical Harmonic Lighting: The Gritty Details by Robin Green and have a question.In one of the examples, the author generates coefficients over 4 bands and has a total of 15 coefficients.  Should there be 16 coefficients?  Or maybe I'm misunderstanding something.BennyW   
  If you are talking about the example on page 17, i think there is a coefficient missing from the final band.   ;  for 4 bands you need 16 coefficients   ;  Ok thanks, thats what I thought.  I just wanted to be sure before I continue the paper.BennyW   