Pavel Fryda wrote:
> 
> Hi,
> 
> I have a problem with normal statement. When I rendered following scene,
> I've got attatched picture as an output. It is distorted on it's left
> side. When I removed the line with normal statement, output seemed to be
> OK.
> 
> Is it a bug in povray or in my source code?
> 
> Please help.
> 
> (I'm using POV-Ray for Windows Ver. 3.1g)
> 
[...]

First of all, please don't post binary attachments in this newsgroup
(povray.binary.images can be used for this). Furthermore, jpg is the preferred
format.  

Concerning your problem, I would estimate, the "scale 0.025" in the normal
statement probably causes a rounding error responsible for the strange
behaviour.  But i'm not sure about it.  

For example 
normal { granite 0.15 scale 0.1 }
looks much better although there are still strange things happening :-)

Christoph

--
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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"Pavel Fryda" <fry### [at] seznamcz> wrote in message
news:39D9BB6E.66D1EAD2@seznam.cz...
> Hi,
>
> I have a problem with normal statement. When I rendered following scene,
> I've got attatched picture as an output. It is distorted on it's left
> side. When I removed the line with normal statement, output seemed to be
> OK.
>
> Is it a bug in povray or in my source code?
>
> Please help.
>
> (I'm using POV-Ray for Windows Ver. 3.1g)
>

You could try switching to bozo, which produces similiar results but without
the (apparent) bug. Incidentally, and I could easily be wrong, but the "odd"
area on the left is, I think, what you should get scaling the bumps this
small - the smoother area is the bug (this is assuming that bozo scale 0.025
is similiar to bumps scale 0.025).

As noted, please do not post images in this group - there is a faq in
povray.announce.faq (and with a scene this simple, an image is probably not
required since it only takes a few seconds to render).

BTW assuming you're new here, welcome aboard!

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