The problem is with single-surface objects (such as a disc) which have no
inside and outside.  Therefore, once the ray goes through it once, POV will
always think that it is still inside the object.  IMHO, those objects should
be hollow by default.

For an object like a sphere, the ray enters and then exits the object, so
POV realizes that the ray is no longer inside a non-hollow object.

-Nathan

John VanSickle <van### [at] erolscom> wrote...
> Abe wrote:
> >
> > ArrgggGGGHHH! <resounding slap on the forehead> I must be getting
> > senile!! Yes, it was missing that blasted "hollow". Works fine now.
>
> Passing through a non-hollow object appears to turn off all media
> rendering for a ray.  The docs imply that only the object containing the
> media needs to be hollow; actually, *any* object through which the
> media will be seen needs to be hollow.
>
> Regards,
> John
> --
> ICQ: 46085459

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