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...

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