Thanks! I'm not at all happy with it, hopefully the post below will help me improve things. I haven't so far found a proper gnarl tutorial. Chat logs do my head in... It would be nice to have some guide to tweaking these things and getting them to look nice. I don't know where to start, and I haven't time to spend hours and hours experimenting.
You have to learn things like max iterations, bailout, etc. to help you out. For instance, with a quaternion, the lower the iterations, the smoother it gets, and the more steps you have, the less holes, etc. It's all a matter of taking the time to learn it all.