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1 Aug 2024 12:21:42 EDT (-0400)
  Saturday Abstract (Message 1 to 9 of 9)  
From: Christian Froeschlin
Subject: Saturday Abstract
Date: 9 Aug 2008 18:17:42
Message: <489e1786@news.povray.org>
Or more appropriately: "Isosurface accident with leopard pattern"


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From: Samuel Benge
Subject: Re: Saturday Abstract
Date: 9 Aug 2008 19:05:00
Message: <web.489e216766fc95601163401d0@news.povray.org>
Christian Froeschlin <chr### [at] chrfrde> wrote:
> Or more appropriately: "Isosurface accident with leopard pattern"

Ooh, I want one for my table :)

Sam


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From: Thomas de Groot
Subject: Re: Saturday Abstract
Date: 10 Aug 2008 04:03:42
Message: <489ea0de@news.povray.org>
"Christian Froeschlin" <chr### [at] chrfrde> schreef in bericht 
news:489e1786@news.povray.org...
> Or more appropriately: "Isosurface accident with leopard pattern"
>
I am a bit puzzled by this object! On the fringes of the sphere it looks 
like a texture; towards the camera, it looks like solid cones; the highlight 
looks like one from a solid sphere though...; and the shadows are from... 
whatever!

How did you do this?

Thomas


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From: Christian Froeschlin
Subject: Re: Saturday Abstract
Date: 10 Aug 2008 07:00:51
Message: <489eca63$1@news.povray.org>
Thomas de Groot wrote:

> I am a bit puzzled by this object! On the fringes of the sphere it looks 
> like a texture; towards the camera, it looks like solid cones; the highlight 
> looks like one from a solid sphere though...; and the shadows are from... 
> whatever!

Oh, I puzzled the master. Wat een eer! ;)

Actually, I just wanted to make a bumpy sphere by subtracting
f_sphere - f_leopard. However, as I neglected to normalize the
input coordinates for f_leopard to the sphere surface, the
3D-ness of the leopard pattern caused disconnected blobs to
rise from the surface. As this would obviously fall apart on
its own (abstract or not), I encased it in a glass sphere,
which also distorted the view a bit due to the ior. As it
was so sphere-ish, I used the CGSphere environment, which
didn't have anything to reflect except the ground plane
so the glassiness is a bit lost on the upper half.

And because this object is full of shadows I had to use a
bit of radiosity but was not patient enough for quality. It
took about 40 minutes on a P4 with just Radiosity_Debug.
I made the texture itself a bit less rougher so the
artefacts would not scream out quite so loud ;)


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From: Christian Froeschlin
Subject: Re: Saturday Abstract
Date: 10 Aug 2008 07:09:26
Message: <489ecc66$1@news.povray.org>
Samuel Benge wrote:

> Ooh, I want one for my table :)

thanks, but mass production has not started yet ;)


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From: Thomas de Groot
Subject: Re: Saturday Abstract
Date: 10 Aug 2008 08:50:56
Message: <489ee430$1@news.povray.org>
"Christian Froeschlin" <chr### [at] chrfrde> schreef in bericht 
news:489eca63$1@news.povray.org...
>
> Oh, I puzzled the master. Wat een eer! ;)

<grin>

> Actually, I just wanted to make a bumpy sphere by subtracting
> f_sphere - f_leopard. However, as I neglected to normalize the
> input coordinates for f_leopard to the sphere surface, the
> 3D-ness of the leopard pattern caused disconnected blobs to
> rise from the surface. As this would obviously fall apart on
> its own (abstract or not), I encased it in a glass sphere,
> which also distorted the view a bit due to the ior. As it
> was so sphere-ish, I used the CGSphere environment, which
> didn't have anything to reflect except the ground plane
> so the glassiness is a bit lost on the upper half.
>
> And because this object is full of shadows I had to use a
> bit of radiosity but was not patient enough for quality. It
> took about 40 minutes on a P4 with just Radiosity_Debug.
> I made the texture itself a bit less rougher so the
> artefacts would not scream out quite so loud ;)

Thank you indeed for your info. Interestingly this makes for an intriguing 
object that partakes of 2D and 3D at the same time. Very nice!

Thomas


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From: Stephen
Subject: Re: Saturday Abstract
Date: 10 Aug 2008 10:33:47
Message: <ovut94da4kav3d9502b81s42mf03rjqmnb@4ax.com>
On Sun, 10 Aug 2008 14:50:57 +0200, "Thomas de Groot" <t.d### [at] internlDOTnet>
wrote:

>
>"Christian Froeschlin" <chr### [at] chrfrde> schreef in bericht 
>news:489eca63$1@news.povray.org...
>>
>> Oh, I puzzled the master. Wat een eer! ;)
>
><grin>


-- 

Regards
     Stephen


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From: Thomas de Groot
Subject: Re: Saturday Abstract
Date: 11 Aug 2008 03:16:48
Message: <489fe760@news.povray.org>
"Stephen" <mcavoysAT@aolDOTcom> schreef in bericht 
news:ovut94da4kav3d9502b81s42mf03rjqmnb@4ax.com...
> On Sun, 10 Aug 2008 14:50:57 +0200, "Thomas de Groot" 
> <t.d### [at] internlDOTnet>
> wrote:
>
>


So, you are eavesdropping?  :-)

Thomas


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From: Stephen
Subject: Re: Saturday Abstract
Date: 15 Aug 2008 13:34:24
Message: <igfba41eiiarekcdai4jetr0m1qri4jnc7@4ax.com>
On Mon, 11 Aug 2008 09:16:48 +0200, "Thomas de Groot" <t.d### [at] internlDOTnet>
wrote:

>
>"Stephen" <mcavoysAT@aolDOTcom> schreef in bericht 
>news:ovut94da4kav3d9502b81s42mf03rjqmnb@4ax.com...
>> On Sun, 10 Aug 2008 14:50:57 +0200, "Thomas de Groot" 
>> <t.d### [at] internlDOTnet>
>> wrote:
>>
>>

>
>So, you are eavesdropping?  :-)
>
<groan>
I thought that Christian was comparing you to Vincent van Gogh
 :)
-- 

Regards
     Stephen


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