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I haven't seen the source, but maybe increasing max_trace_level might help
you out.
I usually have it on max_trace_level set to 25.
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"Eli" <eli### [at] jehoel net> wrote:
> I haven't seen the source, but maybe increasing max_trace_level might help
> you out.
> I usually have it on max_trace_level set to 25.
Okay - the global_settings of the source file have max_trace_level at 12,
but the photons section has it at only 5. (The source is
http://home.no/t-o-k/POV-Ray/Villarceau_Circles-CSG.txt)
Since I don't mind much how long this takes, so long as it comes out well,
I've bumped both up to 25 and am running the render again - we'll see what
the result looks like. *checks his watch* Probably sometime around June,
then. ;)
Thanks :)
--
Ben
~"When I look around, I see numb empty faces, the world is waiting to die...
this apathy is so suffocating, the slow decay of my mind..."~
- 'Television', Stabbing Westward
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you can try first to render the artifacted parts of the image just to if
this is going to work out.....
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news:423ab4f1$1@news.povray.org...
> Those don't look like artefacts to me. It looks more like filtered
lighting on the edges of the
> silver bands.
>
> Alain
The dark dots?
Marc
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If that's an isosurface, maybe it needs a lower accuracy value.
- Slime
[ http://www.slimeland.com/ ]
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Ben wrote:
>
> ..... until I noticed the weird grey artifacts, that is. I've highlighted a
> few of the more obvious ones in the detail images below. Does anyone have
> any ideas why they appeared and how I can prevent them? I can repair some
Looks like a case of "not enough photons".
--
Maurice
http://get-me.to/Hendrix
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GEd-s+:+aC++UL+PL+E-W++N++o--K-
wO---M-VPS+PEY+PGPt++++5--XRtv+
b+DI+D--Ge++h----y++++
------END GEEK CODE BLOCK------
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"Eli" <eli### [at] jehoelnet> wrote:
> you can try first to render the artifacted parts of the image just to if
> this is going to work out.....
I didn't realise this was possible until you mentioned it - the render is
now quite close to the first major artifact region, so I'll let it carry
on.
I shall let y'all know how it works out by tomorrow...
--
Ben
"They always say time changes things, but you actually have to change them
yourself."
- Andy Warhol
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Hmm... I ran the render again with max_trace_level at 25, for both rays and
photons, and with photons spacing set to one-half the previous value (0.01)
on Maurice's suggestion - I believe that increases the photon count, please
correct me if I'm wrong? Still the same artifacts...
In response to Slime, there are no isosurfaces in the image, only tori (and
one plane and one off-camera sphere).
Does anyone have any other suggestions?
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> In response to Slime, there are no isosurfaces in the image, only tori
(and
> one plane and one off-camera sphere).
Oh; How were the twisted circle things made?
> Does anyone have any other suggestions?
Sometimes torii have accuracy problems at small sizes; try scaling the
entire scene up by a factor of 10 or so.
- Slime
[ http://www.slimeland.com/ ]
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"Slime" <fak### [at] emailaddress> wrote:
> > In response to Slime, there are no isosurfaces in the image, only tori
> (and
> > one plane and one off-camera sphere).
>
> Oh; How were the twisted circle things made?
You'd have to ask Tor for a full explanation, but from how I understand the
source, they are each defined by the intersection of one torus (tilted and
translated slightly from the axes of the object itself) and the hollow
toroid shell created by subtracting a small internal torus from a slightly
larger external one. (I hope that makes sense o.O)
I thought it was a clever method, it's part of why I liked the image...
> > Does anyone have any other suggestions?
>
> Sometimes torii have accuracy problems at small sizes; try scaling the
> entire scene up by a factor of 10 or so.
Alright, I shall try that... cheers :)
--
Ben
"They always say time changes things, but you actually have to change them
yourself."
- Andy Warhol
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