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Here is the text that got trashed in that image.
White text: The only thing changed in these images is the aa, either on
or off, and the one larger image was simply rendered at a larger size.
Red text (upper): The same edge. Same AA, small size rendering. Note that
the line is almost completely gone.
Blue Text: Same edge, same size rendering, no anti-aliasing. The line has
re-appeared.
Red Text (lower): The edge, AA, large size.
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From: Christoph Hormann
Subject: Re: border lines are missing [82.7kb]
Date: 24 Oct 2001 14:03:16
Message: <3BD70264.8F99F2D4@gmx.de>
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Bill DeWitt wrote:
>
> I am not sure what you are saying, but sometimes lines disappear because
> of AA. Here is an example (image below). The only way to fix this particular
> example is to make the "edge" a little larger.
>
Yes, but you can't really say the line is 'visible' without aa. Some
traces from it show up. Have you tried higher quality aa, something like
'+a0.1 +am2 +r4'?
Christoph
--
Christoph Hormann <chr### [at] gmx de>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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"Christoph Hormann" <chr### [at] gmxde> wrote :
>
> Have you tried higher quality aa, something like
> '+a0.1 +am2 +r4'?
Right, I was just trying to demonstrate the general idea, if this has
been proven not to be the problem, then further discussion is moot.
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I have run into problems similar to this before. Part of the problem is
caused by unrealistically sharp edges. If you round the edges a bit it may
add some highlights that will help the edge to stand out better (although
the edge is so small that this might not help). I also agree that it would
help to render at a larger size. On the other hand, the edge doesn't really
stand out too well on a real diskette either since it has very little
depth. I am sitting here looking at a disk as I speak, and if I hold it at
a certain angle the edge becomes nearly invisible. You could also try
adjusting the scene's lighting.
Cris Williams
"marabou" <not### [at] availableyet> wrote in message
news:3bd6c430@news.povray.org...
>
> a pic to my question in povray.newusers
>
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I clicked the send button too soon! :-) Anyway, I've got one last
suggestion. On very small features like this edge, I have had some success
with just ever-so-slightly clipping the corner at a 45 (or whatever) degree
angle. Sometimes this can give you a bit of a highlight and isn't obvious
unless you really zoom in.
Cris Williams
"Cris Williams" <wor### [at] netscapenet> wrote in message
news:3bd83860@news.povray.org...
> I have run into problems similar to this before. Part of the problem is
> caused by unrealistically sharp edges. If you round the edges a bit it
may
> add some highlights that will help the edge to stand out better (although
> the edge is so small that this might not help). I also agree that it
would
> help to render at a larger size. On the other hand, the edge doesn't
really
> stand out too well on a real diskette either since it has very little
> depth. I am sitting here looking at a disk as I speak, and if I hold it
at
> a certain angle the edge becomes nearly invisible. You could also try
> adjusting the scene's lighting.
>
> Cris Williams
>
> "marabou" <not### [at] availableyet> wrote in message
> news:3bd6c430@news.povray.org...
> >
> > a pic to my question in povray.newusers
> >
>
>
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this ideas are worth to try out. positioning the light in different places
is particularily successfull. like playing with AA settings too.
now i have no suggestion how to "cut" an angle or a round shape into disk.
it is because the disk is an ellipsoid from wich i differenced a box for
the labeling area.
should i turn an other way for this or how can i realise it afterwards?
an ectract of my code:
--------------------------start
#declare disk=
union{
difference{
#declare d_h = 0.003;
#declare d_b = 0.09;
#declare d_t = 0.093;
//Hauptkoerper
//main body
superellipsoid{
<0.1,0.1>
scale <d_b/2,d_h/2,d_t/2>
}//superellipsoid
//Etikettflaeche vorne
//label area
box {
<0,0,0>,<1,1,1>
scale <0.073,0.01,0.055>
translate <(-d_b/2)+0.0085,0.0025/2,(-d_t/2)>
}
[...]
}//difference disk
}//union disk
--------------------------end
Cris Williams wrote:
> I clicked the send button too soon! :-) Anyway, I've got one last
> suggestion. On very small features like this edge, I have had some
> success with just ever-so-slightly clipping the corner at a 45 (or
> whatever) degree
> angle. Sometimes this can give you a bit of a highlight and isn't obvious
> unless you really zoom in.
>
> Cris Williams
>
> "Cris Williams" <wor### [at] netscapenet> wrote in message
> news:3bd83860@news.povray.org...
>> I have run into problems similar to this before. Part of the problem is
>> caused by unrealistically sharp edges. If you round the edges a bit it
> may
>> add some highlights that will help the edge to stand out better (although
>> the edge is so small that this might not help). I also agree that it
> would
>> help to render at a larger size. On the other hand, the edge doesn't
> really
>> stand out too well on a real diskette either since it has very little
>> depth. I am sitting here looking at a disk as I speak, and if I hold it
> at
>> a certain angle the edge becomes nearly invisible. You could also try
>> adjusting the scene's lighting.
>>
>> Cris Williams
>>
>> "marabou" <not### [at] availableyet> wrote in message
>> news:3bd6c430@news.povray.org...
>> >
>> > a pic to my question in povray.newusers
>> >
>>
>>
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Well, I didn't say it would be easy! :-) In fact, taking the sharpness off
of the edges may be more trouble than it is worth in this case. Does the
diskette have to be black (dark gray)? If you make it a lighter color, then
the shadows from the raised edge may help to make the edges more obvious.
Cris Williams
"marabou" <not### [at] availableyet> wrote in message
news:3bd86df0@news.povray.org...
>
> this ideas are worth to try out. positioning the light in different places
> is particularily successfull. like playing with AA settings too.
> now i have no suggestion how to "cut" an angle or a round shape into disk.
> it is because the disk is an ellipsoid from wich i differenced a box for
> the labeling area.
> should i turn an other way for this or how can i realise it afterwards?
>
> an ectract of my code:
> --------------------------start
>
> #declare disk=
>
> union{
> difference{
> #declare d_h = 0.003;
> #declare d_b = 0.09;
> #declare d_t = 0.093;
> file://Hauptkoerper
> file://main body
> superellipsoid{
> <0.1,0.1>
> scale <d_b/2,d_h/2,d_t/2>
>
> }//superellipsoid
>
> file://Etikettflaeche vorne
> file://label area
> box {
> <0,0,0>,<1,1,1>
> scale <0.073,0.01,0.055>
> translate <(-d_b/2)+0.0085,0.0025/2,(-d_t/2)>
> }
>
> [...]
>
> }//difference disk
>
> }//union disk
>
> --------------------------end
>
>
>
> Cris Williams wrote:
>
> > I clicked the send button too soon! :-) Anyway, I've got one last
> > suggestion. On very small features like this edge, I have had some
> > success with just ever-so-slightly clipping the corner at a 45 (or
> > whatever) degree
> > angle. Sometimes this can give you a bit of a highlight and isn't
obvious
> > unless you really zoom in.
> >
> > Cris Williams
> >
> > "Cris Williams" <wor### [at] netscapenet> wrote in message
> > news:3bd83860@news.povray.org...
> >> I have run into problems similar to this before. Part of the problem
is
> >> caused by unrealistically sharp edges. If you round the edges a bit it
> > may
> >> add some highlights that will help the edge to stand out better
(although
> >> the edge is so small that this might not help). I also agree that it
> > would
> >> help to render at a larger size. On the other hand, the edge doesn't
> > really
> >> stand out too well on a real diskette either since it has very little
> >> depth. I am sitting here looking at a disk as I speak, and if I hold
it
> > at
> >> a certain angle the edge becomes nearly invisible. You could also try
> >> adjusting the scene's lighting.
> >>
> >> Cris Williams
> >>
> >> "marabou" <not### [at] availableyet> wrote in message
> >> news:3bd6c430@news.povray.org...
> >> >
> >> > a pic to my question in povray.newusers
> >> >
> >>
> >>
>
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i see what you mean. if the size of the later label would be the same like
the whole label area then it would not be a problem, too. ;-) but yes, the
disk(s) have to be black and dark green.
Cris Williams wrote:
> Well, I didn't say it would be easy! :-) In fact, taking the sharpness
> off
> of the edges may be more trouble than it is worth in this case. Does the
> diskette have to be black (dark gray)? If you make it a lighter color,
> then the shadows from the raised edge may help to make the edges more
> obvious.
>
> Cris Williams
>
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