minor curves adjustments in Photoshop
curl3d + falloff2 + 3d stuff
so much time with no fractaling!!!
Here you can see some more raw test renders with different coloring: http://sta.sh/01ksfq1hd8qf It became so suddenly cold here so I felt like picking a wintry colour scheme!
Also in my deviantART gallery at http://lindelokse.deviantart.com/art/Frost-335713848