My entry for heavenriver's Ultra Fractal Redux Challenge #24, 2013 All Star. The only rule is to use Carr 2013 as the only fractal formula. I don't particularly recommend that formula; it's rather difficult to work with (an opinion shared by most of the other entrants). I used the coloring formula Trap the Light Fantastic, which in contrast is fun to work with!
Tools and resources Ultra Fractal 5.04 - fractal generation and rendering Formula: Carr 2013 by Robert Carr (in public formula collection) Coloring Algorithms (both in public formula collection): Trap the Light Fantastic by Toby Marshall Popcorn Plus Orbit Traps by Mark Townsend and Toby Marshall Gradients: Silver and Gold (one I designed) Postprocessing - Adobe Photoshop Elements 9 Levels Resize using Bicubic Sharper Save for Web
If you want to use the gradient, use the version on the bottom layer. The one on the middle layer has some added transparency.