About Spherical Harmonics

[fairyzzxia]

Hello, thank you very much for your work, which has been very helpful to me. I would like to ask about the spherical harmonics you use in engineering; what order are they? I am working with the 4th-order spherical harmonics, and I would like to directly reconstruct the RGB color from the spherical harmonics coefficients stored in the GS model. Could you please clarify if these 48 spherical harmonics parameters are stored in the order of the 16-bit RGB channels? Also, is there any method that can help me convert the spherical harmonics parameters back into RGB colors? I look forward to your reply.