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From: Raystarter
Subject: polarization effect: raytraced image vs. real photograph
Date: 19 Oct 2002 20:52:21
Message: <3db1fe45@news.povray.org>
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I've got one question regarding the effect of polarization on the surface of
dielectric material.
My rough guess is this:
Is there no difference between the real photographed image and the raytraced
image, since the final average intensity of the vertical and parallel
polarized reflection would be the same as the reflected intensity from
raytracing without considering the polarization?
Cheers to the POV-ray development team!!
Raystarter
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From: hughes, b
Subject: Re: polarization effect: raytraced image vs. real photograph
Date: 19 Oct 2002 22:24:42
Message: <3db213ea$1@news.povray.org>
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"Raystarter" <sjy### [at] kornet net> wrote in message
news:3db1fe45@news.povray.org...
> I've got one question regarding the effect of polarization on the surface
of
> dielectric material.
> My rough guess is this:
> Is there no difference between the real photographed image and the
raytraced
> image, since the final average intensity of the vertical and parallel
> polarized reflection would be the same as the reflected intensity from
> raytracing without considering the polarization?
Not a clue from me, mostly because I'm not sure of the relationship between
the two. I suppose you are talking about liquid crystal displays which
change in appearance dependant on viewing angle. If that's the case, the
nearest thing to that effect in POV might be 'reflection' itself with which
minimum and maximum values are used together and varies according to viewing
or surface angle.
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From: Christopher James Huff
Subject: Re: polarization effect: raytraced image vs. real photograph
Date: 19 Oct 2002 22:58:11
Message: <3db21bc3@news.povray.org>
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"Raystarter" <sjy### [at] kornetnet> wrote in message
news:3db1fe45@news.povray.org...
> I've got one question regarding the effect of polarization on the surface
of
> dielectric material.
> My rough guess is this:
> Is there no difference between the real photographed image and the
raytraced
> image, since the final average intensity of the vertical and parallel
> polarized reflection would be the same as the reflected intensity from
> raytracing without considering the polarization?
In the vast majority of cases, polarization makes little or no noticeable
difference. Differences do exist, the ones from polarization just usually
aren't perceivable or measurable. In other cases, with polarized sunglasses
for example, there can be quite big differences.
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