OK this is harder than I thought. This won't be ready until after the weekend, because I can't work on this full time.

Here's where I'm at so far. I have the polar coordinates thing working. I have a version of the Fractal_Sum node that produces radial noise. I can make layers of those tiny twisty fibers, although I haven't got enough control over them yet. And I can get some of that smoky ring stuff going. 

The WIP render shows how things look now. There are 5 layers of effects, 3 fibers, and 2 smoky. It took 155 nodes to do this. 

I need to refine how the effects are controlled and implemented, and I need more effects. Making the effects is hard. Once I have a nice collection of effects that you can layer on top of each other, you should be able to do some pretty complex stuff with a few lines of script.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)