This is done by creating one base shape with Fixed Number Of Childs Points set to 64, then copying it, increasing radius, changing opacity & color as you go along. Use the keyboard!
Trick is to create a good basic shape and replicate it around. Once you find a nice looking image, save it, as it is still easy to mess the scene up. You can import this scene to GeoKone.NET from http://pastebin.com/VVqnaUbG and check it out yourself. Copy & Paste to menu option “Scene/Import Text/JSON”.