Chris Colefax <chr### [at] tagpovrayorg> wrote:
: But aren't the smooth height field and the bicubic patch essentially the
: same?

  AFAIK the heightfield routine uses a specialized algorithm while the
bpatch routine uses a more general triangle mesh algorithm. This makes
a HF faster to raytrace.
  I don't know if it affects the double-illumination thing.

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

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