This operator generates a scale-like pattern and returns the displaced position, normal, and displacement amount.
Typically, this operator will be used in a displacement shader, with
both outputs piped into the corresponding inputs of the Output operator.
Alternatively, it can be appear in a surface shader, in which case the
displaced normal would be normalized and then connected to the
input of the Lighting Model operator.
t inputs are not specified, the global variables by
the same names will be used instead. If the normal (
N) input is
provided, it should be normalized.