Hi,

I have a scene which renders well when I select to render the .pov file. I have
now created an .ini file to render the scene repositioning the camera using the
animation functionalities.

I am finding that when I render from the .ini file the scene is much darker. I
thought that the Display_Gamma and File_Gamma in the .ini file were causing that
but I tried removing all the lines from the .ini file (except Input_File_Name)
and the result is still much darker.

I am almost sure that I am doing something wrong with gamma correction. In the
scene, I am using "assumed_gamma 1" in the global_settings section and it is set
up for version 3.7. I am using radiosity and media.

I will appreciate any suggestion.

Thanks,
...JC

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Am 21.11.2011 23:01, schrieb jcarlos:

> I have a scene which renders well when I select to render the .pov file. I have
> now created an .ini file to render the scene repositioning the camera using the
> animation functionalities.
>
> I am finding that when I render from the .ini file the scene is much darker. I
> thought that the Display_Gamma and File_Gamma in the .ini file were causing that
> but I tried removing all the lines from the .ini file (except Input_File_Name)
> and the result is still much darker.

That is very... strange.

> I am almost sure that I am doing something wrong with gamma correction. In the
> scene, I am using "assumed_gamma 1" in the global_settings section and it is set
> up for version 3.7. I am using radiosity and media.

Gamma correction is a good bet, though I have currently no idea what's 
going on there.

What operating system are you using?

Are you usually rendering the .pov file from within the GUI? Are you 
rendering from the .ini file from within the GUI as well?

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I need to beg your pardon.

While I was making a test scene to show you, I realized that my .pov and .ini
files were in different directories, i.e. the .ini was not opening the .pov that
I was modifying but an older one.

Sorry again and congratulations for the latest versions. The quality of the
images has been really improved, mainly for the radiosity which now really
cools.

Regards,
...JC

Post a reply to this message

> Hi,
>
> I have a scene which renders well when I select to render the .pov file. I have
> now created an .ini file to render the scene repositioning the camera using the
> animation functionalities.
>
> I am finding that when I render from the .ini file the scene is much darker. I
> thought that the Display_Gamma and File_Gamma in the .ini file were causing that
> but I tried removing all the lines from the .ini file (except Input_File_Name)
> and the result is still much darker.
>
> I am almost sure that I am doing something wrong with gamma correction. In the
> scene, I am using "assumed_gamma 1" in the global_settings section and it is set
> up for version 3.7. I am using radiosity and media.
>
> I will appreciate any suggestion.
>
> Thanks,
> ...JC
>
>

I'd check display_gamma and file_gamma.

If it's only display_gamma that is wrong, then you are OK as the 
effective output should be correct.

If file_gamma is wrong, then your images will have incorrect gamma 
information and will display incorectly.

A good bet would be to set both to sRGB as it should match most hardwares.
Keep assumed_gamma 1



Alain

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