You know, I always wondered how Andigreyscale made lightning-like fractals. Now I find out all you have to do is use the Spherical variation in Apophysis, and you can find beauties like this. Now I just have to make it better!
Rendered at 2K density.
Link
AndiGreyScale
You can do it with just Linear as well. :3 And use curl as a final transform for more variations too.