Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!gatech!bloom-beacon!husc6!cmcl2!beta!hc!ames!amdcad!sun!david From: david@sun.uucp (David DiGiacomo) Newsgroups: comp.graphics Subject: Re: Ray tracing and caustics. Message-ID: <23177@sun.uucp> Date: Fri, 10-Jul-87 13:16:57 EDT Article-I.D.: sun.23177 Posted: Fri Jul 10 13:16:57 1987 Date-Received: Sun, 12-Jul-87 12:23:35 EDT References: <219@sugar.UUCP> Organization: Sun Microsystems, Inc. - Mtn View, CA Lines: 12 In article <219@sugar.UUCP> peter@sugar.UUCP (Peter DaSilva) writes: >It has occurred to me that I have never seen such an effect in ray-traced >images. It shouldn't be too hard: you would have to reverse ray-trace from >the light source for each transparent object and add the caustic to the >texture map for each matte object it eventually falls on. Has anyone >considered doing this? Yes. Take a look at the last illustration in Jim Kajiya's paper "The Rendering Equation" in the Siggraph '86 proceedings. P.S. Why is this paper illustrated by two tiny images surrounded by a vast expanse of blank paper? Grrr.