POV-Ray : Newsgroups : povray.binaries.images : Worldbowl - Technique Recap Server Time
13 Aug 2024 17:27:19 EDT (-0400)
  Worldbowl - Technique Recap (Message 1 to 6 of 6)  
From: Tim Nikias
Subject: Worldbowl - Technique Recap
Date: 30 Jan 2003 19:12:19
Message: <3e39bf63$1@news.povray.org>
Hi all!

As of the last days, time is getting short till I run
into several examns (one each week for the next
6 weeks or so, the last ones less "in frequency", all
in all 7 of 'em nasty buggers), so I've not gotten much
further than cleaning some code (which of course isn't
really visible in the image).

Thus I thought, maybe it might be interesting for some
to get some insight into the technicals:
I'm using photons and radiosity for this image, which
would be entirely insane if I'd actually use the
stacked-planes-cloud-technique and all details.

So, what do I do?

I trace an image, with some details set to "off" or "low",
and replacing the glass-window with a solid don't-see-through
white placeholder. This is done to avoid radiosity affecting
the outside, which isn't really necessary. The radiosity-data
is saved to disk.
As the meshes in the image are required to have the same
detail as in the final version for radiosity to work correctly,
I can also generate the required photons in that pass, also
saved to disk.

At last then, I switch everything to "on" and "high detail", load
the radiosity and photon-data (as well as the meshes I
generated and saved to disk at some point), and trace that
one. Parsing is far below, as well as picking radiosity-samples
(none) or calculating photons (none), since everything gets loaded.
The same save-and-load procedure is applied to the raintrails
on the window as well, which still need some tweaking to look right.

Anyways, for those that haven't got the bandwidth, I've decided
to not attach all images to this post, but rather, reply to this post
four times with the different images.

Enjoy,
Tim


--
Tim Nikias
Homepage: http://www.digitaltwilight.de/no_lights/index.html
Email: Tim### [at] gmxde


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From: Tim Nikias
Subject: Worldbowl - Final Image
Date: 30 Jan 2003 19:13:29
Message: <3e39bfa9@news.povray.org>
The final image, not differing much from the versions I posted before,
though with antialiasing and larger resolution.

--
Tim Nikias
Homepage: http://www.digitaltwilight.de/no_lights/index.html
Email: Tim### [at] gmxde


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Preview of image 'w_bowl_29_01_03.jpg'
w_bowl_29_01_03.jpg


 

From: Tim Nikias
Subject: Worldbowl - Preparation Trace
Date: 30 Jan 2003 19:14:23
Message: <3e39bfdf@news.povray.org>
Tracing the scenery with low-detail, to generate and
save radiosity, photons, meshes and raintrails...

--
Tim Nikias
Homepage: http://www.digitaltwilight.de/no_lights/index.html
Email: Tim### [at] gmxde


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From: Tim Nikias
Subject: Worldbowl - Pure Radiosity
Date: 30 Jan 2003 19:16:13
Message: <3e39c04d@news.povray.org>
Note that in this image no lightsource is used. The radiosity-data
is loaded and lights the surfaces.

Its especially visible on the interior bend of the notebook's turned page,
and the tiny curl. These two effect the final image more than the
remaining part, because they'd otherwise lay in total shadow.

--
Tim Nikias
Homepage: http://www.digitaltwilight.de/no_lights/index.html
Email: Tim### [at] gmxde


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From: Tim Nikias
Subject: Worldbowl - Pure photons
Date: 30 Jan 2003 19:17:24
Message: <3e39c094@news.povray.org>
Only loaded photons visible on the surface.

Note the worldbowl? It had a wrong ambient setting,
this needs to be fixed. No photons there.

--
Tim Nikias
Homepage: http://www.digitaltwilight.de/no_lights/index.html
Email: Tim### [at] gmxde


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From: Rick [Kitty5]
Subject: Re: Worldbowl - Final Image
Date: 30 Jan 2003 21:08:48
Message: <3e39dab0@news.povray.org>
Tim Nikias wrote:
> The final image, not differing much from the versions I posted before,
> though with antialiasing and larger resolution.

Looks good, if a little washed out (thank radioasty for that), attached is
tweaked image.


--
--
Rick

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