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28 Apr 2024 18:21:53 EDT (-0400)
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From: Norbert Kern
Subject: Re: render2painting
Date: 28 Sep 2014 18:30:02
Message: <web.54288bd146a0060aabef77bb0@news.povray.org>
here is a detail of the first - capriccio - approach.
In fact the last addition of Gena at the famous capriccio scene - the
alpha-mapped people at St. Paul's - were the reason to think of another
solution.

It's a pity, that Gena Obukhov's website is down since a long time - if anybody
wants, i'll post the correspondent capriccio scene files. Since they were
published a long time, there should'nt be a problem...


Norbert


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From: clipka
Subject: Re: render2painting
Date: 28 Sep 2014 19:09:27
Message: <54289527@news.povray.org>
Am 28.09.2014 16:20, schrieb Norbert Kern:
> we know several approaches to let renders look like a painting.
> Here I refer to recent postings of Nekar Xenos (e.g.
>
http://news.povray.org/povray.binaries.images/thread/%3C3DA9C724.72F7CEC5@mail.com%3E/?mtop=4).
>

>
http://news.povray.org/povray.binaries.images/thread/%3C3DA9C724.72F7CEC5@mail.com%3E/?mtop=4).

Just two words about your renders (as well as those of Gena, whose works 
I wasn't aware of before):

*HOLY*
   *COW*


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From: Norbert Kern
Subject: Re: render2painting
Date: 29 Sep 2014 03:20:03
Message: <web.5429073546a0060a84d386ea0@news.povray.org>
clipka <ano### [at] anonymousorg> wrote:

> Just two words about your renders (as well as those of Gena, whose works
> I wasn't aware of before):


It's my fault, I assumed everybody knows the "most important povray group
project" so far...

Gena started the project 11 years before
(http://news.povray.org/povray.general/thread/%3C3E814BA5.6C535F62%40mail.com%3E/)
and it came to an successful end (I admire his endurance to coordinate more than
five nonprofs) (http://hof.povray.org/capriccio.html).

Since you wasn't aware of the capriccio scene - I'll publish the scene code.

As a sidekick - the result drove me into the damned "gamma 2.2" camp...


Norbert ;-)


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capriccios - for clipka.jpg


 

From: Thomas de Groot
Subject: Re: render2painting
Date: 29 Sep 2014 03:20:32
Message: <54290840$1@news.povray.org>
On 28-9-2014 17:38, Norbert Kern wrote:
> The second approach circumvents an obvious problem - alpha-mapped objects.
>
> Here a depthmap of the scene is used as a heightfield and objects are placed and
> rotated according to it.
> Obviously there is some room to improvements...
>

I love this one even more. Impressive results indeed and very 
interesting alternatives to 'simple' post-processing.

Thomas


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From: Norbert Kern
Subject: Re: render2painting
Date: 29 Sep 2014 09:25:01
Message: <web.54295d1d46a0060a84d386ea0@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:

> I love this one even more. Impressive results indeed and very
> interesting alternatives to 'simple' post-processing.
>
> Thomas

Many thanks Thomas,

by the way I'm becoming a bit bored with my materials project and want to
publish a "600 materials" update.
Beside more materials I concentrated on postprocessing methods (including some
experiments with reduced color palettes), volume effects, isosurfaces from csg
and so on.

When it's polished, I can send it to you, if you want - since you mentioned a
similar approach from your side.


Norbert


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materials update examples.jpg


 

From: clipka
Subject: Re: render2painting
Date: 29 Sep 2014 10:14:04
Message: <5429692c@news.povray.org>
Am 29.09.2014 09:16, schrieb Norbert Kern:
> clipka <ano### [at] anonymousorg> wrote:
>
>> Just two words about your renders (as well as those of Gena, whose works
>> I wasn't aware of before):
>
> It's my fault, I assumed everybody knows the "most important povray group
> project" so far...

Misunderstanding here: I did know about that capriccio scene; but that 
post-processing thread you linked to is also Gena's work.


> As a sidekick - the result drove me into the damned "gamma 2.2" camp...

Tsk, tsk...

But seriously, when dealing with such an elaborate scene, staying with 
the legacy 2.2 gamma is perfectly legit. After all, that's why 
"assumed_gamma" is still there.


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From: Thomas de Groot
Subject: Re: render2painting
Date: 29 Sep 2014 10:21:12
Message: <54296ad8$1@news.povray.org>
On 29-9-2014 15:22, Norbert Kern wrote:
> Many thanks Thomas,
>
> by the way I'm becoming a bit bored with my materials project and want to
> publish a "600 materials" update.
> Beside more materials I concentrated on postprocessing methods (including some
> experiments with reduced color palettes), volume effects, isosurfaces from csg
> and so on.
>
> When it's polished, I can send it to you, if you want - since you mentioned a
> similar approach from your side.
>

That sounds interesting indeed! I am not that well structured myself and 
certainly do not have a consistent approach.

Thomas


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From: Norbert Kern
Subject: Re: render2painting
Date: 2 Oct 2014 13:25:01
Message: <web.542d89cb46a0060a5f44f3a00@news.povray.org>
"s.day" <s.d### [at] uelacuk> wrote:
> ... to be sure I think I would have to see the
> same scene with each effect applied..
>
> Sean

Meanwhile I did render Capriccio with method 2 and "vertraeumter Fluss" (sorry
for not translating it...) with method 1.

All files to rerender the Capriccio scene and modifications are posted in
povray.binaries.scene-files
(http://news.povray.org/povray.binaries.scene-files/thread/%3Cweb.542d8060714e7e245f44f3a00%40news.povray.org%3E/).

I also (re)posted the original Capriccio scene files from 2003
(http://news.povray.org/povray.binaries.scene-files/thread/%3Cweb.542d85973c52af1d5f44f3a00%40news.povray.org%3E/).

To my slight surprise method 2 works good in both scenes, despite some artefacts
related to using a heightfield with (only) 16 bit depth. A heightfield with 24
bit depth would be perfect.


But judge for yourself.
First here is the Capriccio scene modified with method 2.

Norbert


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painted_capriccio_2.jpg


 

From: Norbert Kern
Subject: Re: render2painting
Date: 2 Oct 2014 13:30:01
Message: <web.542d8aa146a0060a5f44f3a00@news.povray.org>
"s.day" <s.d### [at] uelacuk> wrote:

> ... but to be sure I think I would have to see the
> same scene with each effect applied..
>
> Sean

Here is an image, which shows what I mean with artefacts related to be dependent
on 16 bit depth heightfields.
At least there aren't such artefacts with method 1.

Norbert


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16 bit-depth artefacts.jpg


 

From: Norbert Kern
Subject: Re: render2painting
Date: 2 Oct 2014 13:30:02
Message: <web.542d8b6d46a0060a5f44f3a00@news.povray.org>
"s.day" <s.d### [at] uelacuk> wrote:

> ... but to be sure I think I would have to see the
> same scene with each effect applied..
>
> Sean

Here is my "vertraeumter Fluss" modified with method 1.

Result is even worse than suggested before.


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