This parameter set is used to add surface structures to the mesh to create a more interesting surface.
Fractal noise
When enabled you will be able to add a noise pattern.
@ Amplitude
This is the height of the noise ripples. Higher values create more distinctive patterns. Please alter this parameter carefully.
@ Frequency
Higher values create a denser pattern with more structures, but can lead to unnatural results.
@ Octaves
This setting could be seen as an overall noise. You can create more structures on the surface by increasing the value.