"Thomas de Groot" <t.d### [at] internlDOTnet> wrote:
> "Stephen" <mcavoys_AT_aolDOT.com> schreef in bericht
> news:web.456458a1a1eb5d8bf1cb1e660@news.povray.org...
> > "Thomas de Groot" <t.d### [at] internlDOTnet> wrote:
> >
> > Oh! We learn by our mistakes and I've learned a lot :-)
> > One other thing in the original post of the modified scene you said that
> > you
> > multiplied by -1 when you actually divided by -1.  I know the results are
> > the same (I hope) is there any particular reason?
>
> Ah! According to the documentation (c paragraph 2.3.3.3.9) transformations
> on functions are different. So multiplying x by 2 is given as (x/2, y, z).
> See the docs for more details. This is a very important paragraph because it
> allows you to manipulate the functions as you want. It helped me enormously
> in building my Geomorph macro a couple of years ago (see:
> http://povray.tirnalong.com/ow.asp?GeoMorph ).

That makes sense to me <g> I don't do hard things.

> > Actually there were two other things. On my works monitor the image looks
> > a
> > little washed out, what gamma settings are you using?
> >
> I have the same when first viewing the image in WindowsExplorer for
> instance. Saving it again in PSP without doing anything generally takes care
> of the problem. It come from the new gamma handling in version 3.7. It has
> been replaced by display_gamma in the ini, and set at 2.2. If  I read the
> docs right, presently 'assumed_gamma = 1' is automatically translated to
> 'display_gamma = 2.2' but I am not sure about this. Still a thing to
> investigate.
>
Interesting, Thanks

Stephen

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