Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!fluke!ssc-vax!coy
From: coy@ssc-vax.UUCP (Stephen B Coy)
Newsgroups: comp.graphics
Subject: Pixar's noise function
Keywords: random numbers, Byte, elephants
Message-ID: <2553@ssc-vax.UUCP>
Date: 28 Mar 89 19:15:15 GMT
Organization: Boeing Aerospace Corp., Seattle WA
Lines: 19

[...]

Hi there,
	Last night I saw the article in Byte about the Renderman
standard.  In the sample source code the displacement function, dent(),
calls a function called noise().  Noise() takes a point as its
parameter and returns a float in the range 0..1.  The article says
this is a semi-random value that changes slowly over the surface of
the object.  My question:  Does anyone out there know what this
noise function really is?  Are you willing to share this info/source
with the rest of us?  Please?

	Thanks in advance for any responses.

Stephen Coy
uw-beaver!ssc-vax!coy

ps  Anyone have any decent marble texture functions you'd like to
    share?