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Hola,
I'm struggling with trying to get aa to smooth out the jagged edges on some
objects in a scene ....
Was wondering what the most typical aa values would be .... and what about
jitter?
I'm using +am2 +a0.1 +r4 +j .... still seeing some problems with some edges.
One problem I fixed with rotating the object sightly around the Y axis, but
that is not always an option. I've noticed that camera and light source
postion can help too ....
Just curious what most of you find works for you.
Ciao, Jim
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Perhaps you are using v.3.6 in a scene with a very bright background.
If this is the case, try v.3.5.
Personally I prefer to render a much bigger scene and scale the image then
down.
For more discussions look at Kari Kivisalo's postings in this thread. I
think, you'll find this useful
(http://news.povray.org/povray.newusers/thread/%3C3ca64234%241%40news.povray.org%3E/?mtop=32).
Norbert Kern
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"Norbert Kern" <nor### [at] t-online de> wrote in message
news:web.4479aa20188459dcf7d74acb0@news.povray.org...
> Perhaps you are using v.3.6 in a scene with a very bright background.
> If this is the case, try v.3.5.
> Personally I prefer to render a much bigger scene and scale the image then
> down.
Hmmmm .... using v3.6 1280x1024 .... I'll double size and see where that
leads.
> For more discussions look at Kari Kivisalo's postings in this thread. I
> think, you'll find this useful
>
(http://news.povray.org/povray.newusers/thread/%3C3ca64234%241%40news.povray.org%3E/?mtop=32).
Thanks for the link .... if I read it right they seemed to be eluding to
bigger size as well.
+a0.0 +r3 didn't work for me either .... any more depth and render time is
WAY up.
Thanks Jim
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Jim Holsenback <jho### [at] hotmailcom> wrote:
> +a0.0 +r3 didn't work for me either
Is one of the parts where the jagged line is very bright?
--
- Warp
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"Warp" <war### [at] tagpovrayorg> wrote in message
news:447aafa5@news.povray.org...
> Jim Holsenback <jho### [at] hotmailcom> wrote:
>> +a0.0 +r3 didn't work for me either
>
> Is one of the parts where the jagged line is very bright?
yes it is .... i was going to try what previous poster mentioned (render at
higher resolution and resize) but haven't gotten around to it.
Jim
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Jim Holsenback <jho### [at] hotmailcom> wrote:
> > Is one of the parts where the jagged line is very bright?
> yes it is
There's a problem in povray 3.6 related to this. You might want to try
rendering with povray 3.5.
Some solution has been planned for the upcoming 3.7 but I don't know any
details.
--
- Warp
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Jim Holsenback nous apporta ses lumieres en ce 29/05/2006 05:19:
> "Warp" <war### [at] tagpovrayorg> wrote in message
> news:447aafa5@news.povray.org...
>> Jim Holsenback <jho### [at] hotmailcom> wrote:
>> Is one of the parts where the jagged line is very bright?
>
> yes it is .... i was going to try what previous poster mentioned (render at
> higher resolution and resize) but haven't gotten around to it.
>
> Jim
>
>
The bright part is probably oversaturated. The colour value, before clipping, greater
than 1 for 1
or more component. When you antialias, you average the various parts of that pixel,
and the overly
bright part will push the colour up. With version 3.5 and earlier, the clipping was
done before AA,
atenuating this effect.
A workaround can be to lower the beightness of the element concerned. Try lowering the
light(s)
intencity. Try reducing the object's ambient and/or diffuse levels. Use a somewhat
darker shade.
I've seen a similar effect in actual digital photos where you have particularly large
contrasts.
--
Alain
-------------------------------------------------
'I hate quotations.' -- Ralph Waldo Emerson
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Alain <ele### [at] netscapenet> wrote:
> I've seen a similar effect in actual digital photos where you have particularly
large contrasts.
No, digital photos do not present aliasing, they present color bleeding.
--
- Warp
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Warp nous apporta ses lumieres en ce 01/06/2006 03:37:
> Alain <ele### [at] netscapenet> wrote:
>> I've seen a similar effect in actual digital photos where you have particularly
large contrasts.
>
> No, digital photos do not present aliasing, they present color bleeding.
>
Well, I've seen some photos where it REALY looked like aliasing. Realy crenated edges
between light
and dark regions.
--
Alain
-------------------------------------------------
Seventh Day Adventism: No shit shall happen on Saturday.
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