I have been working on a Dragon image on and off for a year. I never seem to be happy with the way it goes. This is a work in progess and this version has been finshed in photoshop (the thread fall etc.)
I based the image around a Dragon (without rider at this stage) fighting Thread in the skys above Pern. Anyone familiar with the Dragon books by Anne McCaffery will be familiar with the scene I would think.
The scale effect is achieved by using the Spherical Blend Material. I saved out a copy of the material and reloaded 4 versions of it and progressivly increased the HVScale for each one. For example, the model below (A 3DRing with less that 36o degrees) uses 4 versions of the material with different settings.