-Robert Bunney
There are over 13,000 palettes in this collection, so I thought
I might suggest what kinds of palettes to look for, how many palettes to collect
and how these palettes might be organized. One caveat: these thoughts
are my personal opinions formed from using Fractal Explorer for several years.
Other FE users and artists may do things differently.
To me palettes combined with the palette browser are one of the most powerful image
finding tools in FE. The palette dialog is usually the first tool I use when
starting a new work. I find palettes to have more impact on the final FE image
than palettes/gradients in other fractal programs. On the downside I find FE
Palettes to be less predictable than palettes/gradients in other fractal programs.
The key to FE palettes for me is to have a very rich and varied set of palettes
in a default/primary location and to use the palette browser to quickly apply these
palettes at random. I only do careful tweaking in the palette dialog after I've
found a fairly strong image using the palette browser and the Select Fractal settings.
In my opinion, you cannot have too many palettes, but you
don’t want too many palettes in your 'default' or 'primary' location. The
palette browser remembers the last
directory used, so I always finish with the palette browser in the same directory,
which I think of as my default directory. When the palette dialog is brought
up, the palette browser loads the list of all the palettes in the last directory
used. The longer it takes to load this list of files, the longer it
will take for the palette dialog to fully come up. My patience for this dialog
coming up is around one second. The number of palette files I can have in my
default or primary directory and still have the dialog appear in under a second
varies by machine. On my old, slow laptop,
the number is around 500. On my newest
machine the number is in the thousands. It is best to keep non-palette
files out of your default/primary directory to speed up the load of the
palette dialog.
I know some artists organized their palettes by category,
but in general I find random organization of the palettes in the default or
primary directory is a better solution. I never know what a palette will bring
out, and am constantly surprised by what palettes work with specific fractal
settings. Sometimes a powerful image appears when I apply a random palette that
I would not have rationally selected. The palette browser lists the palette
files by file name, so to create a random collection, randomize the file names.
At times, I’ve gone so far as to randomize the file names of the palette files
in my default/primary directory. There are a couple exceptions to my random
organization. I keep a few 'special'
palettes where I can find them. Palettes named with a leading zero
(000.frp for example), will appear at the front of the list. Palettes
named with a leading ‘z’ will appear at the end of the palette list. If
I want to keep a palette handy, I will name them with a leading zero or ‘z.’
There are a lot of flashy and complex palettes in the collection.
The are also many simple palettes. It is easy to overlook the simple palettes, but
I find in general simple palettes are successful more often than complex palettes.
Also the colors in the final image are not restricted to colors displayed in the
palette (for whatever reason).
For example here is a simple 'hill' palette:
But when I apply this simple palette I have this multi-hued image:

The colors in the original palette don't appear in the final image. Dramatics
change from the palette colors to image colors is one reason I like to apply a wide
variety of palettes at random.
Pay attention to the shape of the slope on a UF gradient palette. I call
this shape a 'slope' and it will often produce different results than the 'hill' palette
above:

In general I find slope palettes produce better, more 3-D looking forms and hill
palettes have smoother shapes.
If you see the same UF gradient, don't automatically assume that you already have
that palette in your collection. There are a few controls that manage what I think of as complexity.
In the palette dialog the main ones are transformation and density:

For example, transformations settings of ArcTan and Log(cube power) will simplify an image
Transformation settings of Square Power will bring out detail. Often when I find a palette that works
well, I'll save it with a couple of different transformations. Finding the right transformation is often
the key to unlocking a beautiful image.
There are many UF-type palettes in this collection that have a large number
of points...255 in some cases. These palettes are nearly impossible to edit, are slow to load,
and are infrequently my palette of choice. But when these palettes work, they can produce
images with the look and feel of metal, glass, or organic material. I keep a few of these palettes
at the end of my collection and a much larger set in a subdirectory.

This concept is one I've only run across recently (while learning another fractal
program). I've only made baby steps in this area, but the idea is interesting enough for me
to include here. When light bounces off an object and hits another, the color of the light takes
on the color of the object. Painters use this idea in tinting shadows and reflections of objects near
each other. We can emulate this idea a bit by including some of an adjacent color in the "shadow" of another
color. When it works, the 'forms' in the fractal feels more 'real.' Take a look at this piece of a UF
palette:

See how there is gold in the 'shadow' of the white. There are a few palettes in this collection with this
kind of 'reflected light.'
I've found my reading on color theory helpful in constructing and selecting palettes. There
are a number of resources on the net on color theory. Here are two to get you started:
Whole college level courses are taught on color theory, so I still have a lot to learn in this area. I've found
this book particuarily helpful and approachable on the subject:
Exploring Color by Nita Leland.
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