POV-Ray: Newsgroups: povray.binaries.images: Photons

POV-Ray : Newsgroups : povray.binaries.images : Photons		Server Time 19 Nov 2024 15:38:28 EST (-0500)

From: Andrew
Subject: Photons
Date: 18 Dec 2001 16:55:39
Message: <3c1fbb5b@news.povray.org>

Just trying them out for the first time on something more than a sphere.

The shape is made of a dodecahedron and an icosohedron.  count 50000,
but I think it used more like 5 million.  Dispersion 1.1, with 100
samples.  One light source (area light up and to the right).  Photons
took 1.5 hours on a pentium 233, rendering took 40 hours on a P3 500
that was used for games for at least a third of that time.

I suppose the banding artifacts are down to not using enough photons?
And does anyone know why the caustics are so bright?  They look a little
unreal to me.

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From: Rick [Kitty5]
Subject: Re: Photons
Date: 18 Dec 2001 17:41:37
Message: <3c1fc621$2@news.povray.org>

> I suppose the banding artifacts are down to not using enough photons?
> And does anyone know why the caustics are so bright?  They look a little
> unreal to me.

they look like the best damn photons I have seen to date :)


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Rick

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From: Lutz-Peter Hooge
Subject: Re: Photons
Date: 18 Dec 2001 22:07:27
Message: <MPG.168a22cc63ff904f9896cf@news.povray.org>

In article <3c1fbb5b@news.povray.org>, ast### [at] hotmailcom says...

> I suppose the banding artifacts are down to not using enough photons?

Probably not, try using "jitter".


> And does anyone know why the caustics are so bright?  They look a little
> unreal to me.

Its a bug with dispersion. The more dispersion_samples, the brighter it 
gets.

Lutz-Peter

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From: Jim Kress
Subject: Re: Photons
Date: 18 Dec 2001 23:49:21
Message: <3c201c51@news.povray.org>

Would you please post your code for this?  I've been trying to get exactly
this effect with no positive results.

Thanks.

Jim


"Andrew" <ast### [at] hotmailcom> wrote in message
news:3c1fbb5b@news.povray.org...
> Just trying them out for the first time on something more than a sphere.
>
> The shape is made of a dodecahedron and an icosohedron.  count 50000,
> but I think it used more like 5 million.  Dispersion 1.1, with 100
> samples.  One light source (area light up and to the right).  Photons
> took 1.5 hours on a pentium 233, rendering took 40 hours on a P3 500
> that was used for games for at least a third of that time.
>
> I suppose the banding artifacts are down to not using enough photons?
> And does anyone know why the caustics are so bright?  They look a little
> unreal to me.
>
>
>

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