Here are some postscript files for some of my old papers. 

euro91.ps.Z   A Eurographics 91 paper on evaluating the quality
              of sampling patterns.  Mostly of interest if you
              want pointers to the discrepancy literature (although
              Dobkins/Mitchell's more recent work ina GI93 and
              the 92 Renderng workshop is more complete).

gi90.ps.Z     My graphics interface 90 paper on hooking up bakward
              (Arvo) ray tracing with radiosity (a hard-coded
              three pass strategy).  Some figures missing.
              The Chen et al paper from siggraph 91 is a (much)
              more complete application of multi-pass methods.

gi91.ps.Z     With Sung/Brown.  An implementation paper that
              extends the work of Kirk/Arvo's "Ray Tracing Kernal".
              Includes a (sketchily described!) implementation
              of radiosity with non-diffuse patches that is 
              similar to that proposed by Le Saec and Schlick at
              the 1990 rendering workshop.

gi93.ps.Z     With a cast of thousands.  Describes some experience
              with eliminating burnout when displaying high 
              dynamic range images.  About a 12Mb ps file-- sorry!

rw91.ps.Z     With Wang.  A Eurographics Rendering Workshop paper
              on sampling luminaires in ray tracing.  This will
              be extended in a forthcoming TOG paper.

rw92.ps.Z     With Wang.  How do you handle surfaces that are
              neither ideal diffuse nor ideal speculan a ray
              tracer?  This paper doesn't give a good answer, but
              does argue that the answer is not simple!

rw94.ps.Z     With Chiu.  Fleshes out Kajiya's arguments that
              for complex scenes, we need ray tracing approaches.

tr.ps.Z       With Chiu.  Describes some implentational issues 
              behind the figures in rw94.ps (Indiana U tech report).

thesis        Directory with a lot of out of date stuff!  Probably not
              worth reading unless you are new to rendering.