[jacobgorm]

I believe that is due to the use of Spherical Harmonics.

[Aardwolf]

That seems more complex to store and render than everything else about a gaussian splat, how are these used efficiently?

[jacobgorm]

There is a bit of explanation here https://aras-p.info/blog/2023/09/05/Gaussian-Splatting-is-pr... (found via Google).