By chance, I sold an image yesterday (Thanks to the buyer in the UK), that is a combination of a photo and a fractal piece made in a freeware program. I call it, "Ghost Ship".
I find some fractals seem to be limited as art except perhaps as seemingly abstract or semi-abstract pieces, but even some abstract pieces have thought behind them when being created. Otherwise for me, they are mostly random, or mathematical formulations that produce some interesting designs. I suppose the term "Fractal" should be clarified to mean, "Fractal-based" in most of the so-called "Fractal software programs". Creating them based on fractals gives the person creating the design, more control of the design. This is a help when trying to create something art-worthy.
I have experimented with a few fractal freeware programs which I think result in more interesting creations when manipulated into 3D stereo designs which give them the added dimension of depth! Still, I found them somewhat limiting for me and then finally it dawned on me that I could combine different ones in an effort to have more creativity and even a bit more control of what I wanted to do.
In my example of "Ghost Ship", the fractal portion is the opaque and strange atmosphere surrounding the ship which was a real ship image I took of The historic, USS Constellation, in Baltimore's Inner Harbor since it was the only "old", tall ship available to me at the time. I manipulated the image to try and form a "Ghost Ship" rendering. To my surprise, a buyer from the UK bought two different 3D Stereo Crossview image prints yesterday, and this was one of them.
I've sold a few other 3D stereo images over the past 3 years here on FAA including both 3D stereo anaglyph, and Crossview formats. Although the format may be out of the mainstream, there's still a community "out there", that has a fascination and enthusiasm for this genre'.
To view the Crossview Stereo image in 3D (with depth)... Gently converge (cross) your eyes and focus on the middle image that appears while ignoring the outside. If you've ever viewed one of those "Magic Eye" images with the hidden 3D image, this is the same principle. Not everyone is successful with this method of viewing, but if you are, it becomes easier each time and eventually 2nd nature.