"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 ).

> 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been replaced by display_gamma in the ini, and set at 2.2.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.

Thomas

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"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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"Thomas de Groot" <t.d### [at] internlDOTnet> wrote:
> Here is an image with Tek's rough sea, and my Moray built VOC ship (in need
> of an upgrade!). Only the flags were not rendered due to a uv_mapping issue
> in version 3.7.
>
> total render time (v.3.7) about 2 hours, with a HP Media Center PC; Pentium
> D 2x3GHz
>
> Not the most perfect scene, but just to show off  :-)
>
> Thomas

Nice pic, but the captain will be court martialed and keel hauled for
running full sail in that kind of weather merely to appease your artistic
vision!

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On Wed, 22 Nov 2006 13:27:04 +0100, "Thomas de Groot" <t.d### [at] internlDOTnet>
wrote:

>
>"Stephen" <mcavoys_AT_aolDOT.com> schreef in bericht 
>news:web.45643206a1eb5d8bf1cb1e660@news.povray.org...
>>
>> Humph!
>> Now you're showing your age :-) I only go back as far as dip pens
>>
>
><cackle! cackle!> Just only 1..60 years old, young man!
>
>Thomas 
>

Young man! Why thank you. You "silver surfer". you :-)
I'm not far behind you only 4 years.


Regards
	Stephen

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On Wed, 22 Nov 2006 16:02:36 +0100, "Thomas de Groot" <t.d### [at] internlDOTnet>
wrote:

>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.

FYI
At home using my laptop I need to do a gamma correction of 0.38 with PSP. It
then looks dramatic & great.

Regards
	Stephen

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"gonzo" <rgo### [at] lansetcom> schreef in bericht 
news:web.4564a442a1eb5d8ba0c272b50@news.povray.org...
>
> Nice pic, but the captain will be court martialed and keel hauled for
> running full sail in that kind of weather merely to appease your artistic
> vision!
>

Well, you know how it went in those days: the captain was subject to the 
official VOC trader onboard (in this case, me) who told him what to do! They 
often hated each other, but in most cases things went well.

Thomas

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"Stephen" <mcavoysATaolDOTcom@> schreef in bericht 
news:a0e9m29nki4bu5ei6rbij87smtouu27frh@4ax.com...
>>
>
> Young man! Why thank you. You "silver surfer". you :-)
> I'm not far behind you only 4 years.
>

Ah ha!!! Still the prerogative of age!!  :-)

Thomas

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"Stephen" <mcavoysATaolDOTcom@> schreef in bericht 
news:pqe9m2d6nep75994s9fhm5lujkolg35k5b@4ax.com...
>>
> FYI
> At home using my laptop I need to do a gamma correction of 0.38 with PSP. 
> It
> then looks dramatic & great.
>

Interesting.
I shall have to investigate this somehow. At this stage I can tell the 
following (just using the current v.3.6 global settings and rendering in 
v.3.7):
- 'As is', the image looks fine in the render window;
- in the viewer of Windows Explorer, the image looks washed out;
- in PSP, the image looks fine, identical to the render window;
- saving the image in PSP (without changing anything) and opening it in the 
WinEx viewer, the image looks fine;

Now, of course, this is all on one machine. I have not (yet) tested it by 
opening the image on another PC.

Thomas

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I keep being fascinated by Tek's rough sea.

This is a third visit to that region. Just playing around. The only thing I 
changed here is cancelling the -30*y rotation of the isosurface in Tek's 
original code.
Imo, the issue now is one of scale with the ship. I think that the ship 
should be somewhat larger. On the other hand, the image is quite dramatic 
with the ship plunging in the trough between two waves. In the forefront, 
there is also what appears to be a trough.

Thomas

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Attachments:
Download 'Tek_RoughSea_03.jpg' (53 KB)

Preview of image 'Tek_RoughSea_03.jpg'

"Thomas de Groot" <t.d### [at] internlDOTnet> wrote:
> I keep being fascinated by Tek's rough sea.
>
> This is a third visit to that region. Just playing around. The only thing I
> changed here is cancelling the -30*y rotation of the isosurface in Tek's
> original code.
> Imo, the issue now is one of scale with the ship. I think that the ship
> should be somewhat larger. On the other hand, the image is quite dramatic
> with the ship plunging in the trough between two waves. In the forefront,
> there is also what appears to be a trough.
>
> Thomas

Yes!
Running afor the wind with all sails set.

Stephen

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