Metal Storm is a 3D Fractal I created using a Free program called Mandelbulb3d. It has a High Learning Curve, but there are many Youtube Videos available to help you get started.
I've seen a few other People here on Steemit using this Program and I want to share a few Render settings with you to help you get 'Smoother Results' in your render. The settings in Raystep Multiplier are the key, here's what I used on this one.
The Default setting is .5 Lowering that number will take the Graininess out of your render.
Keep in mind the Lower the number the longer the Render will take.