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I see you're using a beat frequency trick to get a kind of poor-man's multiwave coloring: use a gradient frequency that's slightly different from the iteration frequency of the shapes (seahorses or what-have-you) in an area to produce a lower beat frequency that will then, say, make that there zigzag bright and the areas farther from it dark.

You could probably go much farther by creating and saving several gradients for each area, then after calculating an image applying each one in turn and saving a copy, then combining the copies as layers in Photoshop using suitable filters. I'd play around with the idea myself, maybe post a test image, but sadly I have no way of purchasing Fractal Extreme, since even after ten years of widespread e-commerce the infrastructure is built on the presumption of everyone "that matters" being creditworthy and being willing to borrow rather than just directly spend. (Even more stupidly, it's still built on customers trusting large numbers of parties with conflicting interests with a single secret number that is all one needs to authenticate a transaction in their name. With ubiquitous SSL using RSA and AES encryption, our webmail is better cryptographically secured than our money. Someone's priorities are backward here.)