POV-Ray: Newsgroups: povray.general: no light inside glass object

POV-Ray : Newsgroups : povray.general : no light inside glass object		Server Time 31 Oct 2024 08:15:03 EDT (-0400)

From: Thesmophoriazusae
Subject: no light inside glass object
Date: 21 Nov 2005 20:00:00
Message: <web.43826d55414d38c46d01331b0@news.povray.org>

I have a glass bowl with some candy inside, and the candy looks very dull,
as if no light is coming into the bowl...I've tried playing with media,
interior, filter/transparency, photons, etc, but I don't know what I'm
doing wrong...I should be able to see the shadows and highlights on the
candy inside the bowl.
Help?

Regards,

C.Arthur

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From: Mike Williams
Subject: Re: no light inside glass object
Date: 21 Nov 2005 21:22:05
Message: <+QTsrBAz$ngDFwgd@econym.demon.co.uk>

Wasn't it Thesmophoriazusae who wrote:
>I have a glass bowl with some candy inside, and the candy looks very dull,
>as if no light is coming into the bowl...I've tried playing with media,
>interior, filter/transparency, photons, etc, but I don't know what I'm
>doing wrong...I should be able to see the shadows and highlights on the
>candy inside the bowl.
>Help?

Is it possible that your max_trace_level is not high enough?

-- 
Mike Williams
Gentleman of Leisure

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From: Thesmophoriazusae
Subject: Re: no light inside glass object
Date: 22 Nov 2005 00:55:00
Message: <web.4382b235b2412db26d01331b0@news.povray.org>

I've simplified the situation just to experiment.  It seems that my objects
inside the bowl do not want to show caustics. I tried just putting a simple
flat glass wall between the light and the candies, and then I see that the
floor shows the caustics, but the candies do not.  Does it make any
difference that they are mesh objects with uv-coordinates?

Mike Williams <nos### [at] econymdemoncouk> wrote:
> Wasn't it Thesmophoriazusae who wrote:
> >I have a glass bowl with some candy inside, and the candy looks very dull,
> >as if no light is coming into the bowl...I've tried playing with media,
> >interior, filter/transparency, photons, etc, but I don't know what I'm
> >doing wrong...I should be able to see the shadows and highlights on the
> >candy inside the bowl.
> >Help?
>
> Is it possible that your max_trace_level is not high enough?
>
> --
> Mike Williams
> Gentleman of Leisure

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From: Thesmophoriazusae
Subject: Re: no light inside glass object
Date: 22 Nov 2005 01:10:01
Message: <web.4382b51ab2412db26d01331b0@news.povray.org>

I figured it out!  I just needed more photons, that's all.

"Thesmophoriazusae" <pan### [at] aolcom> wrote:
> I've simplified the situation just to experiment.  It seems that my objects
> inside the bowl do not want to show caustics. I tried just putting a simple
> flat glass wall between the light and the candies, and then I see that the
> floor shows the caustics, but the candies do not.  Does it make any
> difference that they are mesh objects with uv-coordinates?
>
>
> Mike Williams <nos### [at] econymdemoncouk> wrote:
> > Wasn't it Thesmophoriazusae who wrote:
> > >I have a glass bowl with some candy inside, and the candy looks very dull,
> > >as if no light is coming into the bowl...I've tried playing with media,
> > >interior, filter/transparency, photons, etc, but I don't know what I'm
> > >doing wrong...I should be able to see the shadows and highlights on the
> > >candy inside the bowl.
> > >Help?
> >
> > Is it possible that your max_trace_level is not high enough?
> >
> > --
> > Mike Williams
> > Gentleman of Leisure

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