Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!cornell!vax5!cnsy
From: cnsy@vax5.CIT.CORNELL.EDU
Newsgroups: comp.graphics
Subject: Re: Village Idiot Asks About Raytracing
Keywords: ray tracing stochastic distributed
Message-ID: <17484@vax5.CIT.CORNELL.EDU>
Date: 5 Dec 88 15:28:16 GMT
References: <7818@well.UUCP> <6520@netnews.upenn.edu>
Sender: news@vax5.CIT.CORNELL.EDU
Reply-To: cnsy@vax5.cit.cornell.edu (Eric Haines)
Organization: 3D/Eye Inc
Lines: 17

>>[Will a mirror shine reflected light on other objects?]
>>Does it depend on whose software I'm using?
>
>Radiosity models take a completely different approach to this problem.
>See e.g. "A Radiosity Solution for Complex Environments" - Cohen and
>Greenberg, SIGGRAPH 85, or "A Radiosity Method for Non-Diffuse Environments"
>- Immel and Cohen, SIGGRAPH 86.  These guys don't discuss mirrors,

One radiosity article that does show the effect of mirrors is in the SIGGRAPH
87 Proceedings, "A Two-Pass Solution to the Rendering Equation: A Synthesis of
Ray Tracing and Radiosity Methods" by Wallace, Cohen & Greenberg.  See page
319, image 10c.  The "mirror world" technique as it applies to radiosity is
touched upon on page 315.  For detailed info, get Holly Rushmeier's thesis
(reference 21 of the article).  I believe she may have an article about this
topic somewhere soon (TOG, maybe?).

Eric Haines, 3D/Eye Inc, ...!hplabs!hpfcla!hpfcrs!eye!erich