> I would like to do:
> (1) povray3.7 plot.pov ... -> 3.7 rendering with new gamma correction
> (2) povray3.7 GammaParameter=2.2 -> 3.7 rendering with no gamma correction

How about this one:

(1) povray3.7 File_Gamma=1.0 plot.pov ...
(2) povray3.7 File_Gamma=2.2 plot.pov ...

As far as I understand the whole Gamma thing (which still is not *that* far), it
is actually (2) that will give you gamma correction (namely ready to displayed
on a system that has a gamma of 2.2), while (1) will give you an output without
gamma correction.

> I could attach some files but each of them is around 18MB (uncompressed), so
> before going to this, i'll prefer asking the simple point here:
> - is it possible to tweak povray3.7beta to mimic the 3.6 behaviour (concerning
> the gamma rendering, of course), with a command line or specicif .ini?

That should be possible by specifying File_Gamma=x on the command line or in an
INI file, and.. um...well, I'll be if I can tell you right here whether you
need to set x=2.2 or x=1.0 to get 3.6 behavior... one of them *should* do the
trick, at least when combined with a "#version 3.7;" statement (though that
should be implied if left out).

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"clipka" <nomail@nomail> wrote:

> > I would like to do:
> > (1) povray3.7 plot.pov ... -> 3.7 rendering with new gamma correction
> > (2) povray3.7 GammaParameter=2.2 -> 3.7 rendering with no gamma correction
>
> How about this one:
>
> (1) povray3.7 File_Gamma=1.0 plot.pov ...
> (2) povray3.7 File_Gamma=2.2 plot.pov ...
>
> As far as I understand the whole Gamma thing (which still is not *that* far), it
> is actually (2) that will give you gamma correction (namely ready to displayed
> on a system that has a gamma of 2.2), while (1) will give you an output without
> gamma correction.
>

Argh, i was using the argument *at the end* of the command line, stupid me :-(

Thanks a lot for you help, that shows me i can find the colors back to what they
were (important for publication work) but *not* all the rendering (some
triangles are missing), but i can live with that, due to the enormous
performance difference in rendering :-).

I'll wait for next betas now, to see if i can help ...

Cheers,

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