Ken <tyl### [at] pacbellnet> wrote:
: It is useful to allow refraction for patch objects. Render the following
: and you will clearly see that it refracts just as you would expect it to
: in real life -

  In real life an (almost) infinitely thin surface doesn't refract at all.
  Refraction requires difference in density in different sides of a surface.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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