Hello,


After trying out various sources*, I realize that anything related to 
reading and writing in exr format on Mac does not work.

My version is :
Persistence of Vision(tm) Ray Tracer Version 3.8.0-beta.2.unofficial
Compiler: Apple LLVM 12.0.5 (clang-1205.0.22.11)


Is this a general bug in POVRay or is it specific to Mac?





* :
<https://www.lilysoft.org/CGI/SR/Spectral%20Render.htm>
<http://www.ignorancia.org/index.php?page=lightsys>
...


-- 
kurtz le pirate
compagnie de la banquise

Post a reply to this message

hi,

kurtz le pirate <kur### [at] freefr> wrote:
> After trying out various sources*, I realize that anything related to
> reading and writing in exr format on Mac does not work.
>
> My version is :
> Persistence of Vision(tm) Ray Tracer Version 3.8.0-beta.2.unofficial
> Compiler: Apple LLVM 12.0.5 (clang-1205.0.22.11)
>
> Is this a general bug in POVRay or is it specific to Mac?

can you please post a scene plus image ?  I don't use Apple but I'd like to try
it here (the most "exotic" file format I have to hand is one hdr image :-)).


regards, jr.

Post a reply to this message

On 2025-12-27 06:37 (-4), kurtz le pirate wrote:
> 
> After trying out various sources*, I realize that anything related to
> reading and writing in exr format on Mac does not work.
> 
> My version is :
> Persistence of Vision(tm) Ray Tracer Version 3.8.0-beta.2.unofficial
> Compiler: Apple LLVM 12.0.5 (clang-1205.0.22.11)

Did you compile this yourself?  If the OpenEXR development library is
not installed on your computer, the POV-Ray build will just skip it and
compile successfully without it.

> Is this a general bug in POVRay or is it specific to Mac?

I suppose whether this is a bug or a feature is open to interpretation.
I have openSUSE GNU/Linux.

Post a reply to this message

On 27/12/2025 15:58, Cousin Ricky wrote:
> On 2025-12-27 06:37 (-4), kurtz le pirate wrote:
>>
>> After trying out various sources*, I realize that anything related to
>> reading and writing in exr format on Mac does not work.
>>
>> My version is :
>> Persistence of Vision(tm) Ray Tracer Version 3.8.0-beta.2.unofficial
>> Compiler: Apple LLVM 12.0.5 (clang-1205.0.22.11)
> 
> Did you compile this yourself?  If the OpenEXR development library is
> not installed on your computer, the POV-Ray build will just skip it and
> compile successfully without it.


No, i use an unofficial version compiled by Yvo Smellenbergh



>> Is this a general bug in POVRay or is it specific to Mac?
> 
> I suppose whether this is a bug or a feature is open to interpretation.
> I have openSUSE GNU/Linux.
> 

Hum... not a feature. The error message is :
Cannot initialize semaphore (Function not implemented).


I don't know if OpenEXR isn't implemented at all or if there's a problem.




-- 
kurtz le pirate
compagnie de la banquise

Post a reply to this message

On 27/12/2025 13:04, jr wrote:
> hi,
> 
> kurtz le pirate <kur### [at] freefr> wrote:
>> After trying out various sources*, I realize that anything related to
>> reading and writing in exr format on Mac does not work.
>>
>> My version is :
>> Persistence of Vision(tm) Ray Tracer Version 3.8.0-beta.2.unofficial
>> Compiler: Apple LLVM 12.0.5 (clang-1205.0.22.11)
>>
>> Is this a general bug in POVRay or is it specific to Mac?
> 
> can you please post a scene plus image ?  I don't use Apple but I'd like to try
> it here (the most "exotic" file format I have to hand is one hdr image :-)).
> 
> 
> regards, jr.
> 

Look at <https://www.lilysoft.org/CGI/SR/Spectral%20Render.htm> and 
render ColorChecker.pov by following the instructions
Setion "First Step" on the web page.

command line attributes :
+W800 +H600 +A0.1 +AM2 +R3 +FE +KI1 +KF36 +KFI38 +KFF73

+FE is exr file format.



Later, on "SpectralComposer.pov", exr format is used :

#declare F[I] = function {
  pigment {
   image_map {exr concat(FName, str(I+38,0,0))} translate -0.5
   }
  }





-- 
kurtz le pirate
compagnie de la banquise

Post a reply to this message

hi,

kurtz le pirate <kur### [at] freefr> wrote:
> On 27/12/2025 13:04, jr wrote:
> > ...
> > can you please post a scene plus image ?  ...
> Look at <https://www.lilysoft.org/CGI/SR/Spectral%20Render.htm> and
> render ColorChecker.pov by following the instructions
> Setion "First Step" on the web page.
>
> command line attributes :
> +W800 +H600 +A0.1 +AM2 +R3 +FE +KI1 +KF36 +KFI38 +KFF73
>
> +FE is exr file format.
>
> Later, on "SpectralComposer.pov", exr format is used :
>
> #declare F[I] = function {
>   pigment {
>    image_map {exr concat(FName, str(I+38,0,0))} translate -0.5
>    }
>   }

thanks.  got the two zips last night and works "as advertised"[*], I suspect
that Cousin Ricky is "on the money" wrt missing library.

[*] self-compiled beta.2.


regards, jr.

Post a reply to this message

On 28/12/2025 06:24, jr wrote:

> 
> thanks.  got the two zips last night and works "as advertised"[*], I suspect
> that Cousin Ricky is "on the money" wrt missing library.
> 
> [*] self-compiled beta.2.
> 
> 
> regards, jr.
> 


thanks jr.
so it is indeed missing from the compiled version for mac.
i'll do without it







-- 
kurtz le pirate
compagnie de la banquise

Post a reply to this message

hi,

kurtz le pirate <kur### [at] freefr> wrote:
> so it is indeed missing from the compiled version for mac.
> i'll do without it

on Slackware the libraries are sourced from 'www.openexr.org', I guess
installing now will be handy for when you build your own.

also, out of interest, if possible please post (or send) the output from 'ldd
povray' (the compiled by Ive version).  tia.


regards, jr.

Post a reply to this message