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16 Nov 2024 08:25:34 EST (-0500)
  Variation on a fractal (Message 1 to 7 of 7)  
From: George J  Wallace
Subject: Variation on a fractal
Date: 28 Jun 2007 21:38:53
Message: <468462ad@news.povray.org>
Hi;
  I'm relatively new to POV-RAY, so I expect this technique has been 
used before but I found the results interesting.  I created a fractal in 
Xaos, used the png as a heightfield, and then image mapped the png onto 
the heightfield.
  Original fractal:


  Altered fractal:


-- 
George J. Wallace


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From: George J  Wallace
Subject: Re: Variation on a fractal
Date: 28 Jun 2007 23:07:04
Message: <46847758@news.povray.org>
Hi;
  Here's another one.

  Original fractal:

  Altered fractal:

  -- 
  George J. Wallace


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From: Thomas de Groot
Subject: Re: Variation on a fractal
Date: 29 Jun 2007 03:43:08
Message: <4684b80c$1@news.povray.org>
Interesting. Yes, has been done :-)
A few suggestions:
- Move the camera away from the vertical to increase the sense of depth
- light the height_field from a lower angle (is there a light, btw?); not 
sure, but you may have to set the finish{ambient} to 0 for the map.
- decrease the vertical scale of the height_field

(note: Do not use html format in newsgroup mails.)

Thomas


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From: Stephen
Subject: Re: Variation on a fractal
Date: 29 Jun 2007 06:00:01
Message: <web.4684d7f4a09c9410c4e49fa40@news.povray.org>
"George J. Wallace" <geo### [at] msncom> wrote:
> Hi;
>   I'm relatively new to POV-RAY, so I expect this technique has been
> used before but I found the results interesting.  I created a fractal in
> Xaos, used the png as a heightfield, and then image mapped the png onto
> the heightfield.
>   Original fractal:
>
>
>   Altered fractal:
>
>
> --
> George J. Wallace

I cannot see anything in the html document


Stephen


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From: George J  Wallace
Subject: Re: Variation on a fractal
Date: 29 Jun 2007 12:11:06
Message: <46852f1a$1@news.povray.org>
Hi Thomas;
  Thanks for the advice!  And sorry about using HTML format - won't happen
again.  Do you know if anyone has used this technique for modelling objects
from plan views?  I suspect that painting over a plan view could be a quick
way to create a model for POV-RAY and would like to learn more about the
"tips and tricks" of doing it.
  Thanks again...

gjw

"Thomas de Groot" <t.d### [at] internlDOTnet> wrote in message
news:4684b80c$1@news.povray.org...
> Interesting. Yes, has been done :-)
> A few suggestions:
> - Move the camera away from the vertical to increase the sense of depth
> - light the height_field from a lower angle (is there a light, btw?); not
> sure, but you may have to set the finish{ambient} to 0 for the map.
> - decrease the vertical scale of the height_field
>
> (note: Do not use html format in newsgroup mails.)
>
> Thomas
>
>


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From: Samuel Benge
Subject: Re: Variation on a fractal
Date: 29 Jun 2007 15:05:28
Message: <468557f8$1@news.povray.org>
Thomas de Groot wrote:
> 
> (note: Do not use html format in newsgroup mails.)

That explains the invisible images :/

~Sam


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From: Thomas de Groot
Subject: Re: Variation on a fractal
Date: 30 Jun 2007 04:39:39
Message: <468616cb@news.povray.org>
"George J. Wallace" <geo### [at] msncom> schreef in bericht 
news:46852f1a$1@news.povray.org...
> Hi Thomas;
>  Thanks for the advice!  And sorry about using HTML format - won't happen
> again.  Do you know if anyone has used this technique for modelling 
> objects
> from plan views?  I suspect that painting over a plan view could be a 
> quick
> way to create a model for POV-RAY and would like to learn more about the
> "tips and tricks" of doing it.
>  Thanks again...
>
> gjw
>

Any image will do for making a height_field, but it is not really a smart 
way for making objects. To my knowledge, there is one application 
http://www.archipelis.com/ that attempts to do exactly that.

Thomas


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