fBm
A multi-fractal function. Very robust.
Signed
When checked, values returned will be in the range of -1 to 1. If unchecked,
values less than 0 will be returned unsigned. i.e. a value of -.25 will
be returned as .25.
Fractal Increment
Lower values will result in a smoother noise gradient.
Frequency Gap
Higher values will produce larger fractals.
Octaves
Defines the number of iterations for the fractal function. Higher values
will produce more detailed fractals.
x Index, y Index and z
Index
Defines the position point from which to derive a noise sample.
