You can find this filter from the image menu through
Filters → Render → Pattern → Sinus
The Sinus filter lets you make sinusoidally based textures,
which look rather like watered silk or maybe plywood. This plug-in
works by using two different colors that you can define in the
Colors tab. These two colors then create wave patterns based on
a sine function.
You can set the X and Y scales, which determine how stretched or
packed the texture will be. You can also set the Complexity of
the function: a high value creates more interference or
repetition in the pattern. An example is shown below.
13.13.2.
Options
Settings tab
X and Y Scales
A low X/Y value will maximize the horizontal/vertical
stretch of the texture, whereas a high value will compress
it.
Complexity
This controls how the two colors interact with each other
(the amount of interplay or repetition).
Random Seed
Random Seed controls random behaviour
of the filter. If the same random seed in the same situation
is used, the filter produces exactly the same results. A
different random seed produces different results. Random
seed can be entered manually or generated randomly by
pressing New Seed
button.
When the Randomize option is checked,
random seed cannot be entered manually, but is randomly
generated each time the filter is run. If it is not checked,
the filter remembers the last random seed used.
Force Tiling?
If you check this, you'll get a pattern that can be
used as for tiling. For example, you can use it as a
background in an HTML page, and the tile edges will be
joined seamlessly.
Ideal/Distorted
This option gives additional control of the interaction
between the two colors. Distorted creates a more distorted
interference between the two colors than Ideal.
Color settings
Colors
Here, you set the two colors that make up your
texture. You can use Black and white or the
foreground/background colors in the toolbox, or you can
choose a color with the color icons. The Alpha
Channels sliders allow you to assign an
opacity to each of the colors. (If the layer you are
working on does not have an alpha channel, they will be
grayed out.)
Blend settings
Gradient
You can choose between three functions to set the shapes
of the waves that are produced: Linear, Bilinear and
Sinusoidal.
Exponent
The Exponent controls which of the two colors is
dominant, and how dominant it is. If you set
the exponent to -7.5, the left color will dominate
totally, and if you set it to +7.5 it will be the other
way around. A zero value is neutral.
