POV-Ray : Newsgroups : povray.binaries.images : Gamma - The Smoking Gun : Re: Gamma - The Smoking Gun Server Time
7 Nov 2024 02:27:16 EST (-0500)
  Re: Gamma - The Smoking Gun  
From: omniverse
Date: 24 Dec 2016 02:55:00
Message: <web.585e297ff869f0899c5d6c810@news.povray.org>
clipka <ano### [at] anonymousorg> wrote:
> Am 24.12.2016 um 00:02 schrieb Alain:
>
> >> Interesting. Do the default values now reflect assumed gamma 1.0 then
> >> or do we
> >> still have to tweak them for assumed gamma 1.0?
>
> As I said, the default for `brilliance` does (as does the default for
> reflection `exponent`), while the default for `ambient` doesn't.
>
> The default for `diffuse` is in the right ballpark.
>
>
> > The diffuse should be OK, maybe reduce ambient. For the rest, it should
> > be correct.

> > something in that range, in the global_settings block.
>
> There's a caveat to this: If you also use other ambient values in your
> materials, that change would reduce higher values too much, and reduce
> lower values too little.
>
> So you might as well stick to the default of `ambient_light 1.0`, and
> instead use:
>
>     default { finish { ambient 0.01 } }
>
> which I think is the cleaner fix.
>
> (Or use radiosity anyway ;))

Just glad you explained all this once again.
I am always going to be tempted to change the way it's supposed to be but that's
from force of habit, wanting to see how a render looks one way then another...
and another...
It's also a good thing to know what does best overall, in general, and go from
there only afterward. If I can relearn how to go about things maybe that's still
possible. :)

Bob


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