POV-Ray: Newsgroups: povray.general: [RFC] Distance dependent isosurface accuracy

POV-Ray : Newsgroups : povray.general : [RFC] Distance dependent isosurface accuracy		Server Time 4 Nov 2024 19:14:49 EST (-0500)

From: Wolfgang Wieser
Subject: [RFC] Distance dependent isosurface accuracy
Date: 15 Nov 2003 14:29:58
Message: <3fb67eb5@news.povray.org>

After reading Christoph Hormann's c't article about computer 
generated landscapes using POVRay, I had the following idea: 

What about a distance dependent isosurface accuracy?

I mean: in the foreground (near to the camera), high accuracy 
is needed while in the background, lower accuracy could IMHO be 
used without noticable difference but for faster rendering. 

Wolfgang

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From: Jim Charter
Subject: Re: [RFC] Distance dependent isosurface accuracy
Date: 15 Nov 2003 14:47:45
Message: <3fb682e1$1@news.povray.org>

Wolfgang Wieser wrote:
> After reading Christoph Hormann's c't article about computer 
> generated landscapes using POVRay, I had the following idea: 
> 
> What about a distance dependent isosurface accuracy?
> 
> I mean: in the foreground (near to the camera), high accuracy 
> is needed while in the background, lower accuracy could IMHO be 
> used without noticable difference but for faster rendering. 
> 
> Wolfgang
> 
I believe Nathan O'Brien is working with that idea though he hasn't 
posted recently.

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From: Christoph Hormann
Subject: Re: [RFC] Distance dependent isosurface accuracy
Date: 15 Nov 2003 17:02:02
Message: <s9ki81-9im.ln1@triton.imagico.de>

Wolfgang Wieser wrote:
> After reading Christoph Hormann's c't article about computer 
> generated landscapes using POVRay, I had the following idea: 
> 
> What about a distance dependent isosurface accuracy?
> 
> I mean: in the foreground (near to the camera), high accuracy 
> is needed while in the background, lower accuracy could IMHO be 
> used without noticable difference but for faster rendering. 

As you probably can imagine you are not the first one to have this idea. 
  :-) I did not try it actually but the advantages could be quite 
limited, the speed of isosurfaces does not depend that much on the 
accuracy setting and low values tend to lead to artefacts.  See also:

Subject: Re: erosion structures (77k)
Date: Thu, 25 Oct 2001 20:26:15 +0900
Newsgroups: povray.binaries.images
From: "R. Suzuki" <r-s### [at] aistgojp>
news://news.povray.org/3bd7f6e8$1@news.povray.org
http://news.povray.org/3bd7f6e8$1@news.povray.org


Christoph

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