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From: ksbooth@watcgl.UUCP
Newsgroups: comp.graphics
Subject: Re: Rainbows (was Re: Ray tracing and caustics.)
Message-ID: <1541@watcgl.waterloo.edu>
Date: Tue, 4-Aug-87 23:57:00 EDT
Article-I.D.: watcgl.1541
Posted: Tue Aug  4 23:57:00 1987
Date-Received: Thu, 6-Aug-87 07:20:52 EDT
References: <219@sugar.UUCP> <543@saturn.ucsc.edu> <1827@vax135.UUCP> <439@sugar.UUCP>
Reply-To: ksbooth@watcgl.waterloo.edu (Kelly Booth)
Organization: U. of Waterloo, Ontario
Lines: 5
Keywords: ray-tracing caustics algorithm reality

Rainbows require only that the ray-tracing take into account the frequency of
the light when refractions are computed.  This has been done.  The rendering
equation can presumably include this (as can the other popular techniques).
The only interesting question is how to do this efficiently.  People have been
and are working on this too.