Vertically moving waves
with different frequencies are simulated by this function. You can use it
to create animated bumpmaps of moving Stream and river water.
Octaves controls the
number of wave layers. Increase this value to add smaller waves.
The valence between larger and smaller waves is regulated by the Persistence
parameter. By adding to the Resolution value, you can
reduce the overall size of the waves.
The amplitude of the waves is
controlled with the Amplify value.
Change the Random Seed value to get
different wave arrangements. Increase the Time Offset
parameter to make the waves move up in vertical direction.