POV-Ray : Newsgroups : povray.binaries.images : Problem with ISO Server Time
15 Aug 2024 08:23:57 EDT (-0400)
  Problem with ISO (Message 1 to 8 of 8)  
From: AC
Subject: Problem with ISO
Date: 19 Jul 2002 07:36:44
Message: <3d37f9cc@news.povray.org>
I Just can't get rid of these black stuff in the middle of this object...
any sugestions?

Ambis


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Attachments:
Download 'ISO_Studio.pov.txt' (3 KB) Download 'ISO_Studio.jpg' (20 KB)

Preview of image 'ISO_Studio.jpg'
ISO_Studio.jpg


 

From: Marc-Hendrik Bremer
Subject: Re: Problem with ISO
Date: 19 Jul 2002 07:45:07
Message: <3d37fbc3@news.povray.org>
You already adjusted max_gradient according to the warning message you got?
You lowered accuracy a bit? You are sure, your Containerobject is big enough
(don't know - do you use a sphere perhaps?)?
If this does not help anything, show us some source!

Hth,

Marc-Hendrik

"AC" <amb### [at] teliacom> schrieb im Newsbeitrag
news:3d37f9cc@news.povray.org...
> I Just can't get rid of these black stuff in the middle of this object...
> any sugestions?
>
> Ambis
>
>
>


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From:
Subject: Re: Problem with ISO
Date: 19 Jul 2002 07:49:18
Message: <2sufjukftv9fvf4n19ab6894or76n2uiut@4ax.com>
On Fri, 19 Jul 2002 13:19:54 +0200, "AC" <amb### [at] teliacom> wrote:
> I Just can't get rid of these black stuff in the middle of this object...
> any sugestions?

It looks similiar to part of POV logo so perhaps in its documentation ...
chapter 9.1.2.8 and/or 9.1.2.1.

BTW, for such object you can be interested in IC_Sor macro in iso_csg library.
http://www-public.tu-bs.de:8080/~y0013390/pov/ic/

ABX


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From: AC
Subject: Re: Problem with ISO
Date: 19 Jul 2002 14:02:46
Message: <3d385446@news.povray.org>
"Marc-Hendrik Bremer" <Mar### [at] t-onlinede> wrote in message
news:3d37fbc3@news.povray.org...
> You already adjusted max_gradient according to the warning message you
got?
I did that.

> You lowered accuracy a bit?
I got to try that, right now it is at the default.

>You are sure, your Containerobject is big enough
> (don't know - do you use a sphere perhaps?)?
Not shure.

> If this does not help anything, show us some source!
The source is povided in an attachment as well just ready to be run.


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From: Marc-Hendrik Bremer
Subject: Re: Problem with ISO
Date: 19 Jul 2002 14:14:23
Message: <3d3856ff@news.povray.org>
"AC" <amb### [at] teliacom> schrieb im Newsbeitrag
news:3d385446@news.povray.org...
>
> "Marc-Hendrik Bremer" <Mar### [at] t-onlinede> wrote in message
> news:3d37fbc3@news.povray.org...
> > You already adjusted max_gradient according to the warning message you
> got?
> I did that.

> > If this does not help anything, show us some source!
> The source is povided in an attachment as well just ready to be run.

Oh, I see!

Your problem is your max_gradient - my pov found a max_gradient about 133. I
set it to 75 and anything worked.

Marc-Hendrik


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From: AC
Subject: Re: Problem with ISO
Date: 19 Jul 2002 14:16:02
Message: <3d385762@news.povray.org>

news:2sufjukftv9fvf4n19ab6894or76n2uiut@4ax.com...
> On Fri, 19 Jul 2002 13:19:54 +0200, "AC" <amb### [at] teliacom> wrote:
> > I Just can't get rid of these black stuff in the middle of this
object...
> > any sugestions?
>
> It looks similiar to part of POV logo so perhaps in its documentation ...
> chapter 9.1.2.8 and/or 9.1.2.1.
I increased the Max_gradient from the recomendet 30.4 to 100 (I tried 81 as
well but the same problem) , That seemed to help, The object is actually a
CSG iso blob and sort of complicated.

>

> BTW, for such object you can be interested in IC_Sor macro in iso_csg
library.
> http://www-public.tu-bs.de:8080/~y0013390/pov/ic/


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From: AC
Subject: Re: Problem with ISO
Date: 19 Jul 2002 14:27:11
Message: <3d3859ff@news.povray.org>
> Your problem is your max_gradient - my pov found a max_gradient about 133.
I
> set it to 75 and anything worked.
>
> Marc-Hendrik
>
Povray sugested 30.31... somthing when I tried
Now I tried 100 at home and that worked... Thanx

Ambis


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From: Marc-Hendrik Bremer
Subject: Re: Problem with ISO
Date: 19 Jul 2002 16:25:40
Message: <3d3875c4@news.povray.org>
"AC" <amb### [at] teliacom> schrieb im Newsbeitrag
news:3d3859ff@news.povray.org...
> Povray sugested 30.31... somthing when I tried
> Now I tried 100 at home and that worked... Thanx

Yeah, you really have to love these warnings - they make you feel they know
what they are talking about, but they often don't. (Okay, they do - but you
have take them by the word). They really even change there mind from time to
time (depends on resolution, camera-settings and so on).
If you get artefacts and "holes" in your isosurface just try to find the
warning of that specific isosurface  (might not be easy if you've got
hundreds of them in your scene) and recheck if it tells you something
useful. The are almost always caused by wrong max_gradient-settings.

Marc-Hendrik


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