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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