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From: jon@oddhack.caltech.edu (Jon Leech)
Newsgroups: comp.graphics
Subject: Re: Rainbows (was Re: Ray tracing and caustics.)
Message-ID: <3441@cit-vax.Caltech.Edu>
Date: Sun, 2-Aug-87 05:18:02 EDT
Article-I.D.: cit-vax.3441
Posted: Sun Aug  2 05:18:02 1987
Date-Received: Sun, 2-Aug-87 20:20:22 EDT
References: <219@sugar.UUCP> <543@saturn.ucsc.edu> <1827@vax135.UUCP> <439@sugar.UUCP>
Sender: news@cit-vax.Caltech.Edu
Reply-To: jon@oddhack.Caltech.EDU (Jon Leech)
Organization: Caltech Odd Hack Committee
Lines: 19
Keywords: ray-tracing caustics algorithm reality

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In article <439@sugar.UUCP> peter@sugar.UUCP (Peter da Silva) writes:
>OK, I think I have come up with something the rendering equation won't
>cover. Chromatic abberation. You know... the stuff that makes rainbows
>colorful and diamonds sparkly. I don't think backtracking would give
>you that. Preprocessing and painting will.

    Make sure you distinguish the rendering equation and various
SOLUTIONS to the rendering equation. I think many people treat these
two aspects of Kajiya's paper as the same thing.

    If you want wavelength-dependent effects, tracing rays of
different wavelengths seems the logical way to go.

--
    Jon Leech (jon@csvax.caltech.edu || ...seismo!cit-vax!jon)
    Caltech Computer Science Graphics Group
    __@/

Down with Mars! Back to the Moon first.