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Hi,
I've been seeing some strange artifacts in the shadows of some rot-sweep
objects that I've been rendering. I'm new to this so forgive me if the
answer is obvious - but I can't seem to figure out what's causing it.
All objects are visible.
Any suggestions would be greatly appreciated!
Regards,
Jim
Post a reply to this message
Attachments:
Download 'jaggie bowls.jpg' (16 KB)
Preview of image 'jaggie bowls.jpg'
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On Fri, 18 Jan 2002 10:25:13 -0800, jim wrote:
>Hi,
>
>I've been seeing some strange artifacts in the shadows of some rot-sweep
>objects that I've been rendering. I'm new to this so forgive me if the
>answer is obvious - but I can't seem to figure out what's causing it.
>
>All objects are visible.
>
> Any suggestions would be greatly appreciated!
>
Try giving your pot a finish with a tiny bit of shinyness in it.
--
Cheers
Steve email mailto:ste### [at] zeropps uklinuxnet
%HAV-A-NICEDAY Error not enough coffee 0 pps.
web http://www.zeropps.uklinux.net/
or http://start.at/zero-pps
6:36pm up 102 days, 10:25, 1 user, load average: 1.01, 1.02, 1.00
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Read section 9.8 in the 3.5 docs (I don't know if it is in the 3.1 docs). I
thionk this is what you are seeing.
-tgq
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From: Christoph Hormann
Subject: Re: Strange Jaggies in the shadows
Date: 18 Jan 2002 14:13:08
Message: <3C4873C0.B562647E@gmx.de>
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jim wrote:
>
> Hi,
>
> I've been seeing some strange artifacts in the shadows of some rot-sweep
> objects that I've been rendering. I'm new to this so forgive me if the
> answer is obvious - but I can't seem to figure out what's causing it.
Looks like a mesh and not a lathe, for meshes this is quite natural.
See:
http://www.povray.org/working-docs/id000359.html
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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If the object consist of triangles (i.e. is a mesh) this is natural but
otherwise not. You found a really strong example.
The problem can be much reduced with area_lights because they cast smooth
shadows.
Hugo
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I had this problem once, increasing the divisions and export divisions fixed
it quite a bit - made it less noticable anyway
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From: Fernando González del Cueto
Subject: Re: Strange Jaggies in the shadows
Date: 18 Jan 2002 22:54:26
Message: <3c48edf2@news.povray.org>
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"jim" <jpkara at mindspring.com> wrote in message
news:3c48687a@news.povray.org...
> Hi,
>
> I've been seeing some strange artifacts in the shadows of some rot-sweep
> objects that I've been rendering. I'm new to this so forgive me if the
> answer is obvious - but I can't seem to figure out what's causing it.
>
> All objects are visible.
>
> Any suggestions would be greatly appreciated!
>
If I'm not mistaken, there is an optional keyword for using a more precise
algorithm for lathes. It was something like STURM, but I haven't seen the
manual... maybe I'm wrong.
I hope it helps you,
Fernando.
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Thanks to both of you.
I found that the object was actually a RAW object which is generated by
moray for rotations using a Glyph. Changing to cubic spline in Moray has
made a big difference. Now...to figure out why.
Jim
news:3c48edf2@news.povray.org...
> "jim" <jpkara at mindspring.com> wrote in message
> news:3c48687a@news.povray.org...
> > Hi,
> >
> > I've been seeing some strange artifacts in the shadows of some rot-sweep
> > objects that I've been rendering. I'm new to this so forgive me if the
> > answer is obvious - but I can't seem to figure out what's causing it.
> >
> > All objects are visible.
> >
> > Any suggestions would be greatly appreciated!
> >
>
> If I'm not mistaken, there is an optional keyword for using a more precise
> algorithm for lathes. It was something like STURM, but I haven't seen the
> manual... maybe I'm wrong.
>
> I hope it helps you,
>
> Fernando.
>
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Hi "jim" <jpkara at mindspring.com>, you recently wrote in
povray.binaries.images:
> I found that the object was actually a RAW object which is generated by
> moray for rotations using a Glyph. Changing to cubic spline in Moray has
> made a big difference. Now...to figure out why.
Moray attempts to export POV-Ray primitives (lathe, prism) for the
sweeps whenever possible, if not, it exports (smooth) triangles. If
you use the glyph sweep type it cannot export to a POV primitive since
glyph is not a POV-Ray spline type.
- Lutz
email : lut### [at] stmuccom
Web : http://www.stmuc.com/moray
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