UNDERWATER

THE BOX'S MAIN HELP:

This function returns a caustic underwater lighting pattern.
PP is the surface point.
FQ  controls the amount of ripple in the pattern.
OCT controls the amount of turbulence in the ripples.
DEN controls the amount of contrast in the pattern.

PP (input):

This must be a varying point. The default is the surface point, P.

FQ (input):

This must be a float.  Default is 27.0.
This controls the amount of ripple in the pattern.

OCT (input):

This must be a float.  Default is 13.0.
This controls the amount of turbulence in the ripples.

DEN (input):

This must be a float.  Default is 0.7.
This controls the amount of contrast in or the density of the pattern.

OUT (output):

This function returns a caustic underwater lighting pattern.

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