On Tue, 10 Oct 2006 17:16:37 +0200
"Penelope20k" <pen### [at] caramailfr> wrote:

> Yep strange ...i'm still convince that your back is not define ..did the
> reflection works if you remove your difference ..
> i mean if you anly reflect your object A , or object B alone..
> 
[..]

i was proud that someone can see anything in mirror with  difference. without you see
less...

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the 'what' you see in the mirror is not your iso surface ..i think its the
reflects light of your isosurface ...
like difference { A B ..with no_reflection statement }

i dont see also the shadow of your isosurface ...this is strange also ..(but
doenst count yet)





news:200### [at] availableyet...
> On Tue, 10 Oct 2006 17:16:37 +0200
> "Penelope20k" <pen### [at] caramailfr> wrote:
>
> > Yep strange ...i'm still convince that your back is not define ..did the
> > reflection works if you remove your difference ..
> > i mean if you anly reflect your object A , or object B alone..
> >
> [..]
>
> i was proud that someone can see anything in mirror with  difference.
without you see less...

Post a reply to this message

On Tue, 10 Oct 2006 17:25:02 +0200
"Penelope20k" <pen### [at] caramailfr> wrote:

> the 'what' you see in the mirror is not your iso surface ..i think its the
> reflects light of your isosurface ...
> like difference { A B ..with no_reflection statement }
> 
> i dont see also the shadow of your isosurface ...this is strange also ..(but
> doenst count yet)
[..]

there is a shadow of isosurface in mirror. look between my painted lines.  there is a
shadow from light on the ground. it ist a little bit blinded.

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i am going mad.
now only one part is not visible in mirror.
but it comes better:
back part of object is visible in mirror but not in front of it. then I rendered it
without the mirror.
and what should I say: it is invisible!

like Mike Williams said: watch max_gradient warnings.
this time I get one:
Shutdown Warning: The maximum gradient found was 1.001, but max_gradient of the
 isosurface was set to 2.038. Adjust max_gradient to get a faster rendering of
 the isosurface.

if max_gradient is set to 1.001 Povray warns that max_gradient found is 2.038 and vice
versa.

I don not know if this has something to do with my problem. but hints are welcome.

soon I post an image to p.b.images.

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difference{
object { isosurface1_containedby_box }
object {
isosurface2_containedby_box
translate y*-value
}
rotate x*90

double_illuminate
}


news:200### [at] availableyet...
> On Tue, 10 Oct 2006 17:25:02 +0200
> "Penelope20k" <pen### [at] caramailfr> wrote:
>
> > the 'what' you see in the mirror is not your iso surface ..i think its
the
> > reflects light of your isosurface ...
> > like difference { A B ..with no_reflection statement }
> >
> > i dont see also the shadow of your isosurface ...this is strange also
..(but
> > doenst count yet)
> [..]
>
> there is a shadow of isosurface in mirror. look between my painted lines.
there is a shadow from light on the ground. it ist a little bit blinded.

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marabou wrote:
> [...]
> like Mike Williams said: watch max_gradient warnings.
> this time I get one:
> Shutdown Warning: The maximum gradient found was 1.001, but
> max_gradient of the
>  isosurface was set to 2.038. Adjust max_gradient to get a faster
>  rendering of the isosurface.
> 
> if max_gradient is set to 1.001 Povray warns that max_gradient found
> is 2.038 and vice versa.

I guess POV-Ray can not in all cases find out the best max_gradient
value. You should try a very high max_gradient to be sure that this is
not the problem.

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On Tue, 10 Oct 2006 17:58:41 +0200
"Penelope20k" <pen### [at] caramailfr> wrote:

> difference{
> object { isosurface1_containedby_box }
> object {
> isosurface2_containedby_box
> translate y*-value
> }
> rotate x*90
> 
> double_illuminate
> }
> 

it makes no difference.

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Hi

marabou wrote:
> i was proud that someone can see anything in mirror with  difference.
> without you see less...

To find the problem, do the following:
- Remove all unions,differences,intersections or merges from the scene.
- Remove all objects from the scene except _one_ isosurface.
If the error is still present, there is something really wrong. In this
case I would try to tinker with the threshold and accuracy values of
the isosurface. But I'm not an expert ...
If the error is gone, you can reactivate the things one after another
and you will find out what causes the problem.

Anyway, I'm sure that this has something to do with CSG ...

Greetings
Urd

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On Tue, 10 Oct 2006 18:17:12 +0200
Urs Holzer <urs### [at] andonyarcom> wrote:

> Hi
> 
> marabou wrote:
> > i was proud that someone can see anything in mirror with  difference.
> > without you see less...
> 
> To find the problem, do the following:
> - Remove all unions,differences,intersections or merges from the scene.
> - Remove all objects from the scene except _one_ isosurface.
> If the error is still present, there is something really wrong. In this
> case I would try to tinker with the threshold and accuracy values of
> the isosurface. But I'm not an expert ...
> If the error is gone, you can reactivate the things one after another
> and you will find out what causes the problem.
> 
> Anyway, I'm sure that this has something to do with CSG ...
> 
> Greetings
> Urd

thank you for your ideas. 
I had the same but it does not help.

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"marabou" <not### [at] availableyet> wrote in message 
news:200### [at] availableyet...

   I'm no expert, but couldn't this be an 'inverse' situation?

    ~Steve~

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