== noise

=== fractals

fbm:: fractional brownian motion. simple summation of successive basis iterations with geometrically varying amplitude and frequency. results in homogenous and isotropic fields.
hetero:: heterogenous fractal terrain. dampens high frequency contributions at local minima 
rmf::
hmf::

runtime::

==== fractional brownian motion (fbm)

==== hetergenous fractal terrain

==== ridged multi-fractal

==== hybrid multi-fractal

=== parameters

octaves::

H:: fractal hurst parameter.

amplitude::
gain::

frequency::
lacunarity::


=== basis

worley::
perlin::
value::
patch::
constant::

=== lerp

linear::
cubic::
quintic::
cosine::

=== turbulence