Hey @barusa,
I maybe mistaken, but I think there was a course on modeling the shader ball. If I am right it would of been some years ago and has probably been confined to history in the deep dark depths of a storage warehouse somewhere.
Like I said though, I could be wrong.
The shader ball is available free for CGCookie citizens, 👉 cgc-shader-totem 👈
If you are interested in how its made, you can reverse engineer it after download. A great way of learning.
Hope this helps!