I tried using the adc_bailout with PovRay 3.1 and 3.5 for Windows, and in
both cases, it didn't matter if I set it to 0 or to 0.99, I always get the
same results with reflections and refractions.  Is this a bug in the
Windows version?

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Okay, the problem is in the Windows source code.  I put "Warning" statements
to print the ADC_Bailout value, where the token for adc_bailout is parsed,
and where the adc_bailout is set to its default value of 1.0/255.0.  So
which ran first?  Of course, the parsed version.  So the parsed adc_bailout
gets overwritten with the default value.  I can easily fix this in my
unofficial build, but how do I report a bug to the authors?  This bug has
been around since at least version 3.1.

Retsam wrote:
>I tried using the adc_bailout with PovRay 3.1 and 3.5 for Windows, and in
>both cases, it didn't matter if I set it to 0 or to 0.99, I always get the
>same results with reflections and refractions.  Is this a bug in the
>Windows version?
>

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Retsam wrote:

> Okay, the problem is in the Windows source code.  I put "Warning"
> statements to print the ADC_Bailout value, where the token for adc_bailout
> is parsed,
> and where the adc_bailout is set to its default value of 1.0/255.0.  So
> which ran first?  Of course, the parsed version.  So the parsed
> adc_bailout
> gets overwritten with the default value.  I can easily fix this in my
> unofficial build, but how do I report a bug to the authors?  This bug has
> been around since at least version 3.1.
> 
> Retsam wrote:
>>I tried using the adc_bailout with PovRay 3.1 and 3.5 for Windows, and in
>>both cases, it didn't matter if I set it to 0 or to 0.99, I always get the
>>same results with reflections and refractions.  Is this a bug in the
>>Windows version?
>>

May this be the reason for a problem I get allways when I try to render a 
bottle? Please take a look at this example:

http://www.render-zone.com/wip/example.jpg

As you can see, there's a black shadow on the right side. I tried to 
increase max_trace_level as well as the adc_bailout value - without 
success. Is there a workaround available to avoid this?

Thanks & Regards,
Andreas

-- 
http://www.render-zone.com

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Retsam <nomail@nomail> wrote:
> how do I report a bug to the authors?

  There's a povray.bug-reports (iirc the name) group where you should post
a proper bug report. The more information (and possible fixes) you can
provide, the better.
  If what you are saying is true, then this is certainly a bug which should
be fixed.

  (And don't worry when you don't see your article posted there. It's a
moderated group, which means that the article has to be examined by the
group moderator before it gets posted.)

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -

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Warp wrote:
> 
> Retsam <nomail@nomail> wrote:
> > how do I report a bug to the authors?
> 
>   There's a povray.bug-reports (iirc the name) group where you should post
> a proper bug report. The more information (and possible fixes) you can
> provide, the better.
>   If what you are saying is true, then this is certainly a bug which should
> be fixed.
> 
>   (And don't worry when you don't see your article posted there. It's a
> moderated group, which means that the article has to be examined by the
> group moderator before it gets posted.)

As a matter of protocol it should be mentioned that the bug should be
discussed and verified in this group prior to posting in the bug reports
group.

For specifics on bug reporting see -
http://news.povray.org/povray.announce.frequently-asked-questions/25524/?tmax=100

-- 
Ken Tyler

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In article <3e6f3b36@news.povray.org> , Warp <war### [at] tagpovrayorg>  wrote:

> Retsam <nomail@nomail> wrote:
>> how do I report a bug to the authors?
>
>   There's a povray.bug-reports (iirc the name) group where you should post
> a proper bug report. The more information (and possible fixes) you can
> provide, the better.
>   If what you are saying is true, then this is certainly a bug which should
> be fixed.
>
>   (And don't worry when you don't see your article posted there. It's a
> moderated group, which means that the article has to be examined by the
> group moderator before it gets posted.)

In fact the bug has not only been verified, but also fixed now.  That fix
will be included in 3.51.

    Thorsten

____________________________________________________
Thorsten Froehlich
e-mail: mac### [at] povrayorg

I am a member of the POV-Ray Team.
Visit POV-Ray on the web: http://mac.povray.org

Post a reply to this message

In article <web.3e6e946434b411672a3ff2e70@news.povray.org> , "Retsam" 
<nomail@nomail> wrote:

> I tried using the adc_bailout with PovRay 3.1 and 3.5 for Windows, and in
> both cases, it didn't matter if I set it to 0 or to 0.99, I always get the
> same results with reflections and refractions.  Is this a bug in the
> Windows version?

Thanks a lot for reporting this.  Really interesting that nobody noticed.
Looks like it is one of those features few people use.  It will be fixed in
3.51.

    Thorsten


____________________________________________________
Thorsten Froehlich
e-mail: mac### [at] povrayorg

I am a member of the POV-Ray Team.
Visit POV-Ray on the web: http://mac.povray.org

Post a reply to this message

3e6f414e@news.povray.org...
> Thanks a lot for reporting this.  Really interesting that nobody noticed.
> Looks like it is one of those features few people use.

Most likely, it was a feature that didn't get popular because it didn't
work... I've used it in the past but when I saw that it didn't change
anything I just thought that my scene couldn't benefit from it for some
reason or that the changes were too subtle. The fact that it could have been
a bug never crossed my mind...
In fact, once it's fixed many scenes having a non-default adc_bailout value
are going to behave differently! Be sure that people will use it if it makes
a difference, it's not like render times are not an issue ;-)

G.
--

**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters

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"Thorsten Froehlich" <tho### [at] trfde> wrote:
>
> Really interesting that nobody noticed.
> Looks like it is one of those features few people use.

I for one do use it heavily. Since most renderings I make are to be
converted to hi-color eventually (with at most 6 bits per component), I set
adc_bailout to 1/64=0.015625, or even to 0.01.

True, I never bothered to check if that makes any difference... Would be
glad to see the fix, though.

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Gilles Tran wrote:

> Be sure that people will use it if
> it makes a difference, it's not like render times are not an issue ;-)

Yes, I will use it! Not really true that nobody noticed that.

-- 
http://www.render-zone.com

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