JRG <jrg### [at] hotmailcom> wrote in message news:3c267180@news.povray.org...
> Aw, come on it was just an example.
> Lightflow has got it for example:
>
> string "visibility", int depth
> Specify the tracing depth at which the objects made from this material
start
> to be visible.
> This is useful to make objects appear only inside reflections, for example
> to create rich environments though mantaining a black background.
> The default value is 0.
>
> To me it does make sense. Look at the Lightflow's cornell box posted to
> p.b-i. You wouldn't say it's physically impossible, but the camera is just
> two units outside the actual box. And I won't mention how many times I
would
> have wanted to render a nice radiosity scene with a black background
(using
> a no_image sky_sphere).
>
> Really, I thought about this as a more general and simple way to resolve
> many different problems. One single keyword which would include so many
> different effects. I don't need it just now for an actual scene.
>
> What I'd need is truly the _no_image_ objects to participate to radiosity
> calculations. Of course this may be an undesirable effect in some
> circumstances. Thus I think a no_radiosity flag would be more logical (as
> long as no_image doesn't directly imply no_radiosity).
>
> But you can forget what I asked for, because I somehow dislike the tone of
> some responses here.
>
> --
> Jonathan.
>
My  $0.02: It is a good idea, I could use it in a lot of scenes. the tones
of
 some responses were a little off, but thats life.

Gary

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