This function returns a 4D sandy pattern.
The return value will be float, point, vector, normal or color 
depending on the cast, whose component(s) lie in the range [0,1].
The higher the frequency, the finer the grain.

This must be a varying point, vector or normal.
The default is the surface point, P.
This is the seed for the noise function.

This must be a float. The default is 8.0.
This is the frequency of the noise.
The higher the frequency, the finer the grain.

This must be an integer. The default is 1.
This is the time interval for the noise.

This function returns a 4D sandy pattern.
The return value will be float, point, vector, normal or color 
depending on the cast, whose component(s) lie in the range [0,1].
The higher the frequency, the finer the grain.