Le 2025-12-06 à 15:41, Kenneth a écrit :
> Alain Martel <kua### [at] videotronca> wrote:
>>
>>> In your two light sources, I added 'refraction off' to the photon blocks.
>>> Since your mirror is only 'reflecting' light, refraction is not needed. As far
>>> as I can tell, the docs do not mention what the default behavior is--
>>> on or off.
>>
>>
>> Since version 3.6. By default, all light_source, except shadowless
>> lights, have the following photons block :
>> {
>>   reflection on
>>   refraction on
>> }
>>
> 
> In the v3.8 documentation, I did finally find the default behavior at "3.4.3.4.3
> Photon Global Settings"-- but it actually states the opposite(!) :
> 
> All photons default values:
> 
> Light_source:
> area_light    : off
> refraction    : off
> reflection    : off
> 
> So there is some confusion here. I haven't yet looked at the online wiki docs to
> double-check...
> 
> 

And, in my experience, photons work just right WITHOUT any photons block 
in any light_source.

I only add one when I want a light to NOT shoot photons or to activate 
the area_light support.

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