GLOWPATTERN

THE BOX'S MAIN HELP:

This function returns a float, which ranges from [0,1].
The value moves towards zero as the angle between the two vectors grows.

II (input):

This must be a vector.  
The default is the opposite of the camera vector, -I.
When this vector and the NN vector point in the same direction the 
glow is at its hottest and falls off as the angle between them grows.

NN (input):

This must be a normal.  The default is the surface normal, N.
When the II vector and this vector point in the same direction
the glow is at its hottest and falls off as the angle between them grows

ATT (input):

This must be a float.
This is the attenuation of the falloff; zero is no falloff.
The default is 1, linear falloff.

OUT (output):

This function returns a float, which ranges from [0,1].
The value moves towards zero as the angle between the two vectors grows.

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