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how can i get pov 3.0 to anti-alias? The command line options aren't
available yet under the render settings. Thanks.
eva### [at] ptd net
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poty wrote in message <34fefff4.0@news.povray.org>...
>how can i get pov 3.0 to anti-alias? The command line options aren't
>available yet under the render settings. Thanks.
>
> eva### [at] ptdnet
>
Type +a on the command line.
>
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John Henderson wrote in message <34ff0e2c.0@news.povray.org>...
>
>poty wrote in message <34fefff4.0@news.povray.org>...
>>how can i get pov 3.0 to anti-alias? The command line options aren't
>>available yet under the render settings. Thanks.
>>
>> eva### [at] ptdnet
>
>Type +a on the command line.
In the Windows version, how does modifying the default 0.3 AA value
affect antialiasing? Would 0.4 provide greater antialiasing?
Mike
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On Tue, 22 Dec 1998 12:37:01 -0800, Mike Warner <war### [at] bigfootcom> wrote:
>In the Windows version, how does modifying the default 0.3 AA value
>affect antialiasing? Would 0.4 provide greater antialiasing?
0.4 provides LESS antialiasing. The number (0.3) specifies the minimum
difference in brightness between adjacent pixels before AA kicks in. To
apply antialiasing to transitions that fall below the 0.3 threshold,
you'll want to lower the threshold. So 0.2 would antialias more pixels
than would 0.3. There are other parameters that affect how antialiasing
behaves; see the fine documentation for details.
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Mike Warner wrote:
>
> John Henderson wrote in message <34ff0e2c.0@news.povray.org>...
> >
> >poty wrote in message <34fefff4.0@news.povray.org>...
> >>how can i get pov 3.0 to anti-alias? The command line options aren't
> >>available yet under the render settings. Thanks.
> >>
> >> eva### [at] ptdnet
> >
> >Type +a on the command line.
>
> In the Windows version, how does modifying the default 0.3 AA value
> affect antialiasing? Would 0.4 provide greater antialiasing?
There are many ways to adjust the parameters. For example,
create an .ini file with the parameters. For example:
+Iinputfile.pov
+Ooutputfile.png
+FN
+A0.3
+AM2
+SP8
+EP8
Then with this buffer selected, hit the render widget.
Dan
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> Mike Warner wrote:
> > In the Windows version, how does modifying the default 0.3 AA value
> > affect antialiasing? Would 0.4 provide greater antialiasing?
The decimal value in AA settings is the largest amount of color change
from one pixel to the next that is allowed before anti-aliasing takes
over and renders sub pixels. Larger numbers means less AA, smaller
numbers means more AA. Note that, for the most part, objects that were
AA'd at a setting of 0.3 probably won't get "more" AA at 0.1; once an
area of the picture is anti-aliased, it will look the same no matter what
level of AA is selected.
Rich
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Rich Allen wrote:
> Note that, for the most part, objects that were
> AA'd at a setting of 0.3 probably won't get "more" AA at 0.1; once an
> area of the picture is anti-aliased, it will look the same no matter what
> level of AA is selected.
This isn't really true for +AM2 .
Dan
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To clarify further (confuse?), the contrasting parts of a image is the
major factor. Anti-aliasing isn't simply a blurring of all pixels,
rather a test of color at a point and surrounding points based upon
amount of "depth" (+R3 is default, +AM2 causes this to be +R4 as I
understand it) which is a grid of test pixels. When the colors are
closer in contrast (light-gray next to medium-gray) they should be
skipped over by the blending routine and if they are higher contrasting
(white next to black) pixels should get more attention to blending.
Frankly, I'm not positive myself of the true nature of the
anti-aliasing POV-Ray is doing. I have seen high contrast not do well
with lower +A and have usually applied more +R to get better results
instead even though it stands to reason that a very low +A would be key.
Think the thing to do is make a few tests on this and try to see some
in-use results.
Dan Connelly wrote:
>
> Rich Allen wrote:
> > Note that, for the most part, objects that were
> > AA'd at a setting of 0.3 probably won't get "more" AA at 0.1; once an
> > area of the picture is anti-aliased, it will look the same no matter what
> > level of AA is selected.
>
> This isn't really true for +AM2 .
>
> Dan
--
omniVERSE: beyond the universe
http://members.aol.com/inversez/POVring.htm
=Bob
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