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  Chemistry (Message 6 to 15 of 15)  
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From: Margus Ramst
Subject: Re: Chemistry
Date: 5 Oct 1999 09:06:18
Message: <37F9F7A1.A4FE0877@peak.edu.ee>
Will it explode? No? Well that's no fun <sigh>...
I've carefully forgotten everything I ever knew about chemistry, so I can't
really comment on the accuracy. Is an oxygen atom really red and shiny? :)

Margus

Simon de Vet wrote:
> 
> Inspired by the reflective pics, and a diagram in my Chemistry text, I
> made this little pic of a NaCl crystal dissolving in water.
> 
> It's not perfect, but at a render time of about 3 hours, I didn't feel
> like making too many changes. I'm using an 800x600 version as my desktop
> wallpaper. Not too imposing, and blends in well.
> 
> Simon
> http://home.istar.ca/~sdevet
> 
>   --------------------------------------------------------------------------------
>  [Image]


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From: Bob Hughes
Subject: Re: Chemistry
Date: 5 Oct 1999 17:04:58
Message: <37fa67fa@news.povray.org>
Heh, I always imagine hydrogen as red and oxygen as white.  Preconditioning
by earlier Bohr models perhaps?  I too have been away from it too long to
say.

Bob

Margus Ramst <mar### [at] peakeduee> wrote in message
news:37F9F7A1.A4FE0877@peak.edu.ee...
> Will it explode? No? Well that's no fun <sigh>...
> I've carefully forgotten everything I ever knew about chemistry, so I
can't
> really comment on the accuracy. Is an oxygen atom really red and shiny? :)
>
> Margus
>
> Simon de Vet wrote:
> >
> > Inspired by the reflective pics, and a diagram in my Chemistry text, I
> > made this little pic of a NaCl crystal dissolving in water.
> >
> > It's not perfect, but at a render time of about 3 hours, I didn't feel
> > like making too many changes. I'm using an 800x600 version as my desktop
> > wallpaper. Not too imposing, and blends in well.
> >
> > Simon
> > http://home.istar.ca/~sdevet
> >
>
  --------------------------------------------------------------------------
------
> >  [Image]


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From: Simen Kvaal
Subject: Re: Chemistry
Date: 5 Oct 1999 18:34:02
Message: <37fa7cda@news.povray.org>
>It's not perfect, but at a render time of about 3 hours, I didn't feel

3 hours? What kind of machine are you running? Or is there any advanced
quirks to the code I don't know. Just curious.

Some two hundred spheres can be done in a couple of minutes, can't they?

But I love the image! Perfect sphere-image; I have this fascination for
them; maybe because I cannot model anything else... :/


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From: Simon de Vet
Subject: Re: Chemistry
Date: 5 Oct 1999 19:01:56
Message: <37FA8376.4FDD5407@istar.ca>
Simen Kvaal wrote:

> >It's not perfect, but at a render time of about 3 hours, I didn't feel
>
> 3 hours? What kind of machine are you running? Or is there any advanced
> quirks to the code I don't know. Just curious.

Average pentium type computer (I'm ashgamed to admit I don't know the stats.
Waah!)

The 3 hours comes from a 10x10 area light, and a focal vlur with 100
samples.

Plus, there are about ten times as many spheres as are visible. Most of the
distant water got lost in the blur.

Simon
http://home.istar.ca/~sdevet


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From: Jerome M  BERGER
Subject: Re: Chemistry
Date: 5 Oct 1999 19:02:33
Message: <37FA837E.951623C2@enst.fr>
Simen Kvaal wrote:
> 
> >It's not perfect, but at a render time of about 3 hours, I didn't feel
> 
> 3 hours? What kind of machine are you running? Or is there any advanced
> quirks to the code I don't know. Just curious.
> 
> Some two hundred spheres can be done in a couple of minutes, can't they?
> 
> But I love the image! Perfect sphere-image; I have this fascination for
> them; maybe because I cannot model anything else... :/

	I'd guess it's the focal blur that slows it down...

		Jerome

-- 
*******************************

* they'll tell you what can't * mailto:ber### [at] inamecom
* be done and why...          * http://www.enst.fr/~jberger
* Then do it.                 *
*******************************


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From: Simen Kvaal
Subject: Re: Chemistry
Date: 6 Oct 1999 07:47:59
Message: <37fb36ef@news.povray.org>
>
>Average pentium type computer (I'm ashgamed to admit I don't know the
stats.
>Waah!)
>


>The 3 hours comes from a 10x10 area light, and a focal vlur with 100
>samples.


I see... But I don't think the 10x10 improved the quatlity that much. Have
you tried 3x3? 4x4? Maybe it would me just as nice and one third the
rendering time? Maybe it looks crappy, but have you tried? I never use that
much myself...


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From: Rick [Kitty5]
Subject: Re: Chemistry
Date: 6 Oct 1999 11:20:26
Message: <37fb68ba@news.povray.org>
> I'd guess it's the focal blur that slows it down...

Oh, its a killer, real nasty

Rick


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From: Rick [Kitty5]
Subject: Re: Chemistry
Date: 6 Oct 1999 11:30:33
Message: <37fb6b19@news.povray.org>
I have only found a vast improvemt over the 4x4 area light when i use 3 4x4
lights each aligned along on of the 3 axis - sort of like the peice of graph
paper used by someone here - forget who!

however, i have rended some images with upto 30x30 lights, and was very
impressed with the results, especially for simulating sunlight..

Rick

Simen Kvaal <sim### [at] studentmatnatuiono> wrote in message
news:37fb36ef@news.povray.org...
> >
> >Average pentium type computer (I'm ashgamed to admit I don't know the
> stats.
> >Waah!)
> >
>
>
> >The 3 hours comes from a 10x10 area light, and a focal vlur with 100
> >samples.
>
>
> I see... But I don't think the 10x10 improved the quatlity that much. Have
> you tried 3x3? 4x4? Maybe it would me just as nice and one third the
> rendering time? Maybe it looks crappy, but have you tried? I never use
that
> much myself...
>
>
>
>
>


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From: Ian Burgmyer
Subject: Re: Chemistry
Date: 7 Oct 1999 03:24:57
Message: <37fc4ac9@news.povray.org>
Just the opposite for me.  Heh.  Damn teachers :)

--
This message brought to you by:
-=< Ian (the### [at] hotmailcom >=-

Please visit my site at http://spectere2000.cjb.net! :)

Bob Hughes <inv### [at] aolcom> wrote in message
news:37fa67fa@news.povray.org...
> Heh, I always imagine hydrogen as red and oxygen as white.
Preconditioning
> by earlier Bohr models perhaps?  I too have been away from it too long to
> say.
>
> Bob
>
> Margus Ramst <mar### [at] peakeduee> wrote in message
> news:37F9F7A1.A4FE0877@peak.edu.ee...
> > Will it explode? No? Well that's no fun <sigh>...
> > I've carefully forgotten everything I ever knew about chemistry, so I
> can't
> > really comment on the accuracy. Is an oxygen atom really red and shiny?
:)
> >
> > Margus
> >
> > Simon de Vet wrote:
> > >
> > > Inspired by the reflective pics, and a diagram in my Chemistry text, I
> > > made this little pic of a NaCl crystal dissolving in water.
> > >
> > > It's not perfect, but at a render time of about 3 hours, I didn't feel
> > > like making too many changes. I'm using an 800x600 version as my
desktop
> > > wallpaper. Not too imposing, and blends in well.
> > >
> > > Simon
> > > http://home.istar.ca/~sdevet
> > >
> >
>   ------------------------------------------------------------------------
--
> ------
> > >  [Image]
>
>


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From: Rick [Kitty5]
Subject: Re: Chemistry
Date: 7 Oct 1999 08:40:51
Message: <37fc94d3@news.povray.org>
my chem education was totally different, we had a limit on certain colors,
so 'pretending' was required... maybe thats why i never took chem A levels
at high school - that an the chem teacher was a nutter - dropping a 1 inch
cube of sodium into a water filled wine demijon thingy definatly gave me
that idea, or was it the time we decided to make WW 1 mustard gas, only to
realise that the vents were knackered and the class next door got all of our
interesting concoction......  happy times   [sigh]

Rick


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