I think you are right.  I must have changed the glass texture in the ashtray
somehow.  The glasses in the picture don't exhibit the same symptom so it
must be the texture.  Thanks!

"TinCanMan" <Tin### [at] hotmailcom> wrote in message
news:3da828a6$1@news.povray.org...
>
> "Patrick Dugan" <pat### [at] netinsnet> wrote in message
> news:3da82030@news.povray.org...
> > I've been re-rendering a scene.  The first image/example I'm showing is
> the
> > image rendered at 1280 x 1024.  The second image/example was rendered at
> > 10240 x 7680 (much larger) but none of the settings were changed.  As
you
> > can see the glass ashtray became black in the larger image.
> >
> > I was under the impression that I didn't have to alter settings like the
> > max_trace_level (which is 25) when making larger images.  If I have to
(it
> > LOOKS like I have to anyway) what is a good "rule of thumb" to calculate
> the
> > setting on an image that is larger (or smaller) than the original so
that
> it
> > looks the same?
> >
>
> Max_Trace_Level just sets how many times a ray can be reflected or
> refracted, changing the size of your output shouldn't have any effect on
it
> at all.
> Are you sure you didn't change *anything* in the scene? (Maybe textures or
> something)
>
> -tgq
>
>

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