About media scattering, thanks... I just saw default method was 3 and not 1...
>_<

About gamma, File_Gamma is supposed to compensate for the eye's non-linear
perception. But why do we need to do this ?... Shouldn't the eye do it itself ?

I mean, if POV-Ray computes the value like they should be in real-world, then
the eye should perceive them the same way, right ? I mean, the eye perceives
non-linearly the screen as well as it perceives non-linearly the outside world,
doesn't it ?

The brightness POV-Ray computes is linearly proportionnal to the amount of
photonic energy the surface receives, right ? So it needs gamma-transformation
between this value and the brain to look like what we would see in real life.
But if the eye already makes this transformation, why do we also do it on the
computer side ?

I mean, for real photos, do we apply a gamma-correction ?

I don't see why we should bother with how the eye perceives things, since he
will apply whatever gamma-correction it wants to for both screen and real world,
with the same brightness values... Am I wrong ? (Since we do use gamma, I
probably am, I just don't know where... )

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