Philippe Debar <phd### [at] wanadoobe> wrote:
> Is there any planned change for that behaviour?

  Nothing have been planned, but there has been some discussion about the
issue.

  My opinion is that the keyword 'hollow' should be completely removed.
Even though it's a logical name *in its context*, it's *way* too confusing
for new users, and even for some more advanced ones.

  The best replacement keyword I can think of is 'allow_media', optionally
followed by a boolean value.
  (Also the warning would become more clear: "Camera is inside an object
which does not allow media inside it... etc etc".

  Also its behaviour could be changed a bit:
  For objects with no media block defined its default value would be 'off',
while for objects with media block defined the default value would be 'on'.

  There have been other opinions about this behavioral thing as well (but
these require more drastical changes to the code).
  One good idea is that an object with media will always show its own media,
but whether it will show external media (which includes media of other
objects, global media and fog) or not would depend on the 'allow_media'
value.
  This way an object could have its own media, but still be "solid" (in the
sense that other media will not penetrate it).

-- 
plane{-x+y,-1pigment{bozo color_map{[0rgb x][1rgb x+y]}turbulence 1}}
sphere{0,2pigment{rgbt 1}interior{media{emission 1density{spherical
density_map{[0rgb 0][.5rgb<1,.5>][1rgb 1]}turbulence.9}}}scale
<1,1,3>hollow}text{ttf"timrom""Warp".1,0translate<-1,-.1,2>}//  - Warp -

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"Warp" <war### [at] tagpovrayorg> wrote in message
news:3e25696c@news.povray.org...
>   One good idea is that an object with media will always show its own
media,
> but whether it will show external media (which includes media of other
> objects, global media and fog) or not would depend on the 'allow_media'
> value.
>   This way an object could have its own media, but still be "solid" (in
the
> sense that other media will not penetrate it).

Except that then allow_media would be confused since a media might reside in
the object already. I think something more like combine_media on|off might
make sense to everyone. Would be interesting to see how it would affect
things.

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I got a similar situation and would like your advice:  I have an image_map
applied to a plane, of which I'd like to be able to view from either side.
Now even if I use the inverse, one of the sides will be the "inside" giving
the error message.  I tried adding: bounded_by { box { <0,0,0> <1,1,0> } },
but PovRAY gives the message this is unnecessary and removes it.  Ok, I
agree it should be unnecessary, but I was hoping it'd kill off the "inside"
aspect of the plane.

--Eric

Ken <tyl### [at] pacbellnet> wrote:
> "DaveS
> >
> > ...fog & participating media may not work as expected.
> >
> > Does anyone know why I get this error message? The camera is not inside
> > anything and I can't figure out whats wrong.
>
> If you are not using fog or media ignore the warning. You probably have
> a "plane" object in your scene and your camera is inside the normal of
> the plane. It could also be that you are using a sphere to mimic the sky
> which would also lead to that warning. In either case you can add the
> "inverse" keyword to the plane or sphere and that will get rid of that
> warning.
>
> --
> Ken Tyler

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eric914 wrote:
> I got a similar situation and would like your advice:  I have an image_map
> applied to a plane, of which I'd like to be able to view from either side.
> Now even if I use the inverse, one of the sides will be the "inside" giving
> the error message.  I tried adding: bounded_by { box { <0,0,0> <1,1,0> } },
> but PovRAY gives the message this is unnecessary and removes it.  Ok, I
> agree it should be unnecessary, but I was hoping it'd kill off the "inside"
> aspect of the plane.

1) Reverse the surface normal of the plane.
2) If you truely want it to allow media on either side of the surface, 
add hollow to the definition of the plane.

-- 
~Mike

Things! Billions of them!

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