This operator generates anti-aliased (fractional brownian motion) noise by using the derivative information of the incoming position to compute band-limited noise. This type of noise is ideal for shading.
The roughness parameter determines the coarseness of the noise. The maxoctaves parameter limits the noise to a fixed number of iterations.
The amplitude parameter is a scale factor on the resulting noise. The default output range of noise is -0.5 to 0.5.
Make sure at least the Position (
pos) input is connected in order to
notice any noise. The easiest way to accomplish this is to pipe the
P into the
pos input. However, the global variable
is in camera space, so noise will move through the surface.
Connect the noise output to the Color Mix bias or to Displace Along Normal to obtain interesting results. The options are boundless.