Here's my try.
I did a few things differently; First of all, instead of using the cloud render, I messed around with the Mandelbrot render and used that instead. Next, instead of the circular gradient, I used the cone gradient instead. To get rid of the point in the middle of the image, I smoothed it out using Macromedia Fireworks 8
There's so much more that PDN can do than fireworks
Anyway, I think it turned out well.