Ken <tyl### [at] pacbellnet> wrote:
:   I think that you will find that the people in this thread know all about
: how the sky sphere is implemented. The sky sphere is not even really infinite.

  Moreover: The sky sphere is actually a sphere of radius 1 with its
center at the camera location. The differences between a regular sphere and
the sky sphere are, AFAIK:
  1) Ray-object intersection tests are done with the sky sphere only if the
ray in question doesn't hit any other object. If the ray hits another object,
the sky sphere is completely ignored.
  2) The sky sphere is not shaded, that is, no lighting calculations are done
to the sky sphere but the color of the intersection point is taken as is.
  3) You can only apply a pigment to the sky sphere. This is a direct
consecuence of the previous feature (finish and normal are only applicable
when calculating shading; also reflection is not applicable since we are
handling a sphere of radius 1, which probably doesn't surround the whole
scene).

: We were just having fun...

  Yes, pov-humor, you know... Only povrayers understand pov-humor... :)

-- 
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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