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Hi;
This is probably the most elementary question of the month but I'm having
trouble getting rid of jaggies on CSG spheres. I'm rendering at 1280x1024
and I've tried aa values of .1 to .9 without seeing any difference. I'm
using a rather good 19" CRT fed by an ATI Radeon video card but I just can't
approach the fantastic results everyone else gets. Help please.
--
George J. Wallace
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George J. Wallace wrote:
> Hi;
> This is probably the most elementary question of the month but I'm having
> trouble getting rid of jaggies on CSG spheres. I'm rendering at 1280x1024
> and I've tried aa values of .1 to .9 without seeing any difference. I'm
> using a rather good 19" CRT fed by an ATI Radeon video card but I just can't
> approach the fantastic results everyone else gets. Help please.
>
What method and depth are you using?
see 5.2.6.4 Anti-Aliasing Options
Sampling_Method=n Sets aa-sampling method (only 1 or 2 are valid)
Antialias_Threshold=n.n Sets anti-aliasing threshold
Antialias_Depth=n Sets aa-depth (1 <= n <= 9)
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Hi Leroy;
Thanks for the reply. I was just editing the resolution INI file and
wasn't aware there were other options available. That's the problem with
being a newbie - I don't even know what I don't know. What documentation
are you referencing? I can't find it in either my online help file or my
reference-us.pdf file.
Thanks...gjw
"Leroy" <lrw### [at] joplin com> wrote in message
news:460### [at] joplincom...
>
>
> George J. Wallace wrote:
> > Hi;
> > This is probably the most elementary question of the month but I'm
having
> > trouble getting rid of jaggies on CSG spheres. I'm rendering at
1280x1024
> > and I've tried aa values of .1 to .9 without seeing any difference. I'm
> > using a rather good 19" CRT fed by an ATI Radeon video card but I just
can't
> > approach the fantastic results everyone else gets. Help please.
> >
>
> What method and depth are you using?
>
> see 5.2.6.4 Anti-Aliasing Options
> Sampling_Method=n Sets aa-sampling method (only 1 or 2 are valid)
> Antialias_Threshold=n.n Sets anti-aliasing threshold
> Antialias_Depth=n Sets aa-depth (1 <= n <= 9)
>
>
>
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George J. Wallace wrote:
> Thanks for the reply. I was just editing the resolution INI file and
> wasn't aware there were other options available.
There should be some predefined entries in the resolution INI files
using anti-aliasing, didn't those work for you either? Note that the
command line doesn't accept floating point values without leading
zero as you cited them, i.e. the command line is +a0.3, not +a.3
Besides, is your problem that anti-aliasing doesn't seem to have
any effect or just that the result is better but not satisfactory?
Does this problem occur in a specific scene file or also if you
just render a simple scene containg only a sphere?
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Hi Christian;
Thanks for the reply.
I realize that I can't eliminate them entirely and the anti-aliasing
defined in the INI file does have an affect but it still leaves noticeable
jaggies especially at the top/bottom and sides of any curved surface where
the arc segments are nearly straight lines. I modified the existing entry
as follows:
[1280x1024, AA 0.9]
Width=1280
Height=1024
Antialias=On
Antialias_Threshold=0.9
I can't see any difference between a value of 0.1 and 0.9 and the problem
is that I just can't get the quality of anti-aliasing that I see in other
people's work.
Thanks again...gjw
"Christian Froeschlin" <chr### [at] chrfrde> wrote in message
news:460e6656$1@news.povray.org...
> George J. Wallace wrote:
>
> > Thanks for the reply. I was just editing the resolution INI file and
> > wasn't aware there were other options available.
>
> There should be some predefined entries in the resolution INI files
> using anti-aliasing, didn't those work for you either? Note that the
> command line doesn't accept floating point values without leading
> zero as you cited them, i.e. the command line is +a0.3, not +a.3
>
> Besides, is your problem that anti-aliasing doesn't seem to have
> any effect or just that the result is better but not satisfactory?
> Does this problem occur in a specific scene file or also if you
> just render a simple scene containg only a sphere?
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On Sat, 31 Mar 2007 11:24:00 -0500, "George J. Wallace" <geo### [at] msncom>
wrote:
>
> I can't see any difference between a value of 0.1 and 0.9 and the problem
>is that I just can't get the quality of anti-aliasing that I see in other
>people's work.
Just check that you are using the settings you think that you are. In the
message pane there will be a section like below
Tracing Options
Quality: 9
Bounding boxes.......On Bounding threshold: 3
Light Buffer.........On
Vista Buffer.........On Draw Vista Buffer....Off
Antialiasing.........On (Method 1, Threshold 0.300, Depth 3, Jitter 1.00)
Clock value: 0.000 (Animation off)
Regards
Stephen
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On Fri, 30 Mar 2007 19:43:36 -0500, "George J. Wallace" <geo### [at] msncom>
wrote:
>Hi;
> This is probably the most elementary question of the month but I'm having
>trouble getting rid of jaggies on CSG spheres. I'm rendering at 1280x1024
>and I've tried aa values of .1 to .9 without seeing any difference. I'm
>using a rather good 19" CRT fed by an ATI Radeon video card but I just can't
>approach the fantastic results everyone else gets. Help please.
You should definitely see a difference. Try this on your command line:
+w1280 +h1024 +a0.1 +j0.5 +am2
You should see a difference between this and no AA. Like Stephen said, check the
messages to make
sure AA is definitely being used.
Kyle
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Hi Stephen;
Yes, the messages say it's outputting as I specified in the INI file. The
anti-aliasing just does not seem to be "blending" the color of a curved
object at the steps in the curve with the colors of the background. I'll
post a sample in povray.binaries.images and you can see the problem.
Thanks...gjw
"Stephen" <mcavoysATaolDOTcom@> wrote in message
news:h10t0359egfmc59mpn35tcal1dan1hq8tt@4ax.com...
> On Sat, 31 Mar 2007 11:24:00 -0500, "George J. Wallace"
<geo### [at] msncom>
> wrote:
>
> >
> > I can't see any difference between a value of 0.1 and 0.9 and the
problem
> >is that I just can't get the quality of anti-aliasing that I see in other
> >people's work.
>
> Just check that you are using the settings you think that you are. In the
> message pane there will be a section like below
>
> Tracing Options
> Quality: 9
> Bounding boxes.......On Bounding threshold: 3
> Light Buffer.........On
> Vista Buffer.........On Draw Vista Buffer....Off
> Antialiasing.........On (Method 1, Threshold 0.300, Depth 3, Jitter
1.00)
> Clock value: 0.000 (Animation off)
>
>
> Regards
> Stephen
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George J. Wallace nous apporta ses lumieres en ce 30-03-2007 20:43:
> Hi;
> This is probably the most elementary question of the month but I'm having
> trouble getting rid of jaggies on CSG spheres. I'm rendering at 1280x1024
> and I've tried aa values of .1 to .9 without seeing any difference. I'm
> using a rather good 19" CRT fed by an ATI Radeon video card but I just can't
> approach the fantastic results everyone else gets. Help please.
As you are doing a large render, scaling it down will greatly improve antialiasing.
The aa value is the aa thresshold. The lower, the more senditive it get, 0.9 ti
9 times "croaser" than 0.1. The "default" from the presets is 0.3.
A thing that can ruin antialiasing, is extreem contrast, like a white that is
"overexposed" meaning have an RGB value larger than 1 (something like rgb<5,5,5>
cliped to rgb<1,1,1> in the final image) next to something dark.
--
Alain
-------------------------------------------------
to be doing.
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Sorry I didn't get back to you sooner:(
5.2.6.4 Anti-Aliasing Options is from winPOV3.6 docs.
There is another point, is the picture you where talking about the
preview or the saved finished scene?
I have problems with the preview looking worse than the finish product.
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