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19 May 2024 02:11:26 EDT (-0400)
  Light & Shadows (Message 2 to 11 of 36)  
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From: William F Pokorny
Subject: Re: Light & Shadows
Date: 22 Apr 2020 15:10:41
Message: <5ea096b1$1@news.povray.org>
On 4/22/20 2:24 PM, Norbert Kern wrote:
> This idyllic (non-realistic) scene is the result of several months of work. It
> took that long because of an experiment.
> 
...
> 
> Happy rendering in difficult times,
> Norbert
> 
WOW. That's one beautiful image Norbert! Bravo.

Going to sit back, drink a cup of coffee, and stare at it for a while.

Bill P.


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From: Ton
Subject: Re: Light & Shadows
Date: 22 Apr 2020 19:45:01
Message: <web.5ea0d5cc1a336268ac18885c0@news.povray.org>
Fantastic, would like to visit this place. Povray is surely amazing, well done.

Cheers
Ton.


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From: Cousin Ricky
Subject: Re: Light & Shadows
Date: 23 Apr 2020 00:00:42
Message: <5ea112ea@news.povray.org>
On 2020-04-22 2:24 PM (-4), Norbert Kern wrote:
> This idyllic (non-realistic) scene is the result of several months of work. It
> took that long because of an experiment.
> 
> [snip]

That is one truly impressive photograph.  I can hardly wait to see your 
render.

But seriously, you've outdone yourself here.  Great job!

> The chief motiv of the image is the contrast of light and shadows as it is
> important in impressionistic painting or gothic architecture.
> I'll explore this topic in my next images more.
> 
> Beside this philosophical reasons it was important for me in a more technical
> sense as it is the first image since 15 years developed with assumed_gamma 1.
> I think, I'll stay at this since it is obviously possible to realize strong
> contrasts with assumed_gamma 1...

I would expect so.  Real life does it linearly; it is our perceptions 
that are non-linear.  My response to a low contrast scene has not been 
to fiddle with the assumed gamma, but to change the lighting environment.


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From: Thomas de Groot
Subject: Re: Light & Shadows
Date: 23 Apr 2020 03:04:06
Message: <5ea13de6$1@news.povray.org>
Op 22/04/2020 om 20:24 schreef Norbert Kern:
> This idyllic (non-realistic) scene is the result of several months of work. It
> took that long because of an experiment.
> 
> I was curious about what would happen when only looking long enough at each
> parts of the scene and so detecting not so good parts.
> In fact I detected one flaw after another for three long months.
> So I substituted, changed or retextured nearly all objects, some of them several
> times.
> 

Absolutely gorgeous scene indeed. While your "experiment" contains the 
danger of never finishing scene building, it is absolutely essential for 
reaching any level of perfection. I do something less extreme than you 
myself, with the result that over the last couple of years my production 
has dramatically fallen ;-) There are other reasons too for this drop 
but those are coming from RL... Anyway, this is a landmark image.

> In the end the scene used 155 individual objects - by comparison my recent redo
> of "warm_up" only used 21 meshes.
> So the scene contains 31 animals (9 birds, 7 mammals, 11 insects, 3 frogs and 2
> fishes).
> Since some of them are nearly invisible, I downloaded a 8000*4500 pixel version
> (
>
http://news.povray.org/povray.binaries.scene-files/thread/%3Cweb.5ea0897b523527c5afdd13e10%40news.povray.org%3E/
> ).
> 
> Rendering this version took more than 9 days and 43 GB of RAM were used.

I suppose continuous render or did you interrupt and continue (+c) a 
couple of times?

> 
> I worked several weeks on an atmosphere alone, but in the end all I did was
> adding a subtle fog effect.

I recognise that. ;-)

> 
> The chief motiv of the image is the contrast of light and shadows as it is
> important in impressionistic painting or gothic architecture.
> I'll explore this topic in my next images more.

Cant wait...

> 
> Beside this philosophical reasons it was important for me in a more technical
> sense as it is the first image since 15 years developed with assumed_gamma 1.
> I think, I'll stay at this since it is obviously possible to realize strong
> contrasts with assumed_gamma 1...

I can only approve.

> 
> 
> Happy rendering in difficult times,
> Norbert
> 

Thanks! My thoughts go to the numerous who are threatened of losing 
their livelihood because of covid19.

-- 
Thomas


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From: Bald Eagle
Subject: Re: Light & Shadows
Date: 23 Apr 2020 07:15:00
Message: <web.5ea1788f1a336268fb0b41570@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:

> Thanks! My thoughts go to the numerous who are threatened of losing
> their livelihood because of covid19.

Indeed.   So as not to hijack discussion of this absolute masterpiece, switching
to off-topic thread for this...


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From: Alain Martel
Subject: Re: Light & Shadows
Date: 23 Apr 2020 12:34:42
Message: <5ea1c3a2$1@news.povray.org>

> On 2020-04-22 2:24 PM (-4), Norbert Kern wrote:
>> This idyllic (non-realistic) scene is the result of several months of 
>> work. It
>> took that long because of an experiment.
>>
>> [snip]
> 

> render.
> 

> 
>> The chief motiv of the image is the contrast of light and shadows as 
>> it is
>> important in impressionistic painting or gothic architecture.
>> I'll explore this topic in my next images more.
>>
>> Beside this philosophical reasons it was important for me in a more 
>> technical
>> sense as it is the first image since 15 years developed with 
>> assumed_gamma 1.
>> I think, I'll stay at this since it is obviously possible to realize 
>> strong
>> contrasts with assumed_gamma 1...
> 


> to fiddle with the assumed gamma, but to change the lighting environment.

Like reducing the ambient amount.


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From: Norbert Kern
Subject: Re: Light & Shadows
Date: 23 Apr 2020 13:30:01
Message: <web.5ea1d0141a336268afdd13e10@news.povray.org>
William F Pokorny <ano### [at] anonymousorg> wrote:
> On 4/22/20 2:24 PM, Norbert Kern wrote:
> > This idyllic (non-realistic) scene is the result of several months of work. It
> > took that long because of an experiment.
> >
> ...
> >
> > Happy rendering in difficult times,
> > Norbert
> >
> WOW. That's one beautiful image Norbert! Bravo.
>
> Going to sit back, drink a cup of coffee, and stare at it for a while.
>
> Bill P.


Lol - in the case you wonder about where all the animals are, here is an image
with all the creatures...

Norbert


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Attachments:
Download 'light & shadows_animals.jpg' (92 KB)

Preview of image 'light & shadows_animals.jpg'
light & shadows_animals.jpg


 

From: Norbert Kern
Subject: Re: Light & Shadows
Date: 23 Apr 2020 13:35:00
Message: <web.5ea1d12e1a336268afdd13e10@news.povray.org>
"Ton" <ton### [at] gmailcom> wrote:
> Fantastic, would like to visit this place. Povray is surely amazing, well done.
>
> Cheers
> Ton.

Thank you - I can remember a guy many years before - he said, povray can depict
anything. I want to add - it's sometimes hard to know, what I want to depict.

Norbert


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From: Norbert Kern
Subject: Re: Light & Shadows
Date: 23 Apr 2020 13:45:01
Message: <web.5ea1d3f71a336268afdd13e10@news.povray.org>
Cousin Ricky <ric### [at] yahoocom> wrote:

> > Beside this philosophical reasons it was important for me in a more technical
> > sense as it is the first image since 15 years developed with assumed_gamma 1.
> > I think, I'll stay at this since it is obviously possible to realize strong
> > contrasts with assumed_gamma 1...
>
> I would expect so.  Real life does it linearly; it is our perceptions
> that are non-linear.  My response to a low contrast scene has not been
> to fiddle with the assumed gamma, but to change the lighting environment.


In fact texturing was really simple. A finish like "specular 0.3 roughness 0.003
diffuse 0.6 ambient 0" worked with nearly all objects. When I used assumed_gamma
2.2 there was much more work to do :-)

The biggest change was to reduce the radiosity contribution of the sky.
Here I used rather extreme settings (at least for me) -

#version 3.7;

#declare RAD = 8;

global_settings {
        assumed_gamma 1
        max_trace_level 255
        noise_generator 2
                radiosity {
                        pretrace_start 0.08
                        pretrace_end   0.04/RAD
                        count 30*RAD
                        nearest_count min (20, RAD)
                        error_bound 3/RAD
                        low_error_factor 0.5
                        recursion_limit 1
                        gray_threshold 0
                        minimum_reuse 0.015
                        brightness 1
                        adc_bailout 0.005
                        normal on
                        media off
                }
}

#declare skyf = 0.5;

light_source {
        <0,0,40000> color srgb (<2.42,2.23,1.87>+2.173*0.3)*0.85
        area_light <1000,0,0>, <0,1000,0> 5,5 adaptive 0 jitter circular orient
        rotate <-47,-50,0>
}

sky_sphere {
        pigment {
                function {max (min (y, 1), 0)}
                color_map {
                        [0.0000  srgb <212*skyf,221*skyf,239*(1+skyf)*0.5>/255]
                        [0.1029  srgb <219*skyf,229*skyf,244*(1+skyf)*0.5>/255]
                        [0.1512  srgb <233*skyf,241*skyf,250*(1+skyf)*0.5>/255]
                        [0.1949  srgb <223*skyf,239*skyf,252*(1+skyf)*0.5>/255]
                        [0.2444  srgb <201*skyf,227*skyf,252*(1+skyf)*0.5>/255]
                        [0.2921  srgb <180*skyf,213*skyf,250*(1+skyf)*0.5>/255]
                        [0.3732  srgb <144*skyf,180*skyf,239*(1+skyf)*0.5>/255]
                        [0.4255  srgb <137*skyf,172*skyf,235*(1+skyf)*0.5>/255]
                        [0.7067  srgb < 97*skyf,126*skyf,198*(1+skyf)*0.5>/255]
                        [0.7740  srgb < 92*skyf,119*skyf,190*(1+skyf)*0.5>/255]
                        [0.8275  srgb < 88*skyf,114*skyf,185*(1+skyf)*0.5>/255]
                        [0.8850  srgb < 85*skyf,111*skyf,180*(1+skyf)*0.5>/255]
                        [0.9425  srgb < 82*skyf,107*skyf,175*(1+skyf)*0.5>/255]
                        [1.0000  srgb < 79*skyf,103*skyf,170*(1+skyf)*0.5>/255]
                }
        }
}

Norbert


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From: Norbert Kern
Subject: Re: Light & Shadows
Date: 23 Apr 2020 14:35:00
Message: <web.5ea1deb71a336268afdd13e10@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:

> Absolutely gorgeous scene indeed. While your "experiment" contains the
> danger of never finishing scene building, it is absolutely essential for
> reaching any level of perfection. I do something less extreme than you
> myself, with the result that over the last couple of years my production
> has dramatically fallen ;-) There are other reasons too for this drop
> but those are coming from RL... Anyway, this is a landmark image.

Thank you Thomas. Indeed there was this danger - but in the end it became clear,
that I want to improve by making other images. There is a subtle intuitive
voice, which guided me. I simply wanted to exclude superficial rational
reasoning...

> I suppose continuous render or did you interrupt and continue (+c) a
> couple of times?

No, I used my two machines - the first for doing all the changes and the second
one for rendering. The second machine with 64 Gb RAM is loud and can heat my
whole passiv house - so my window was wide open all the time since xmas ;-) .


> > Happy rendering in difficult times,
> > Norbert
> >
>
> Thanks! My thoughts go to the numerous who are threatened of losing
> their livelihood because of covid19.

My rational side says such things are and will be inevitable. Personally I
conducted some scenario exercises with similar topics in my compony and in the
beginning I was shocked by the outcomes - this pandemie can lend to very deep
economic recessions - and wars.
Times are becoming even more interesting (in the chinese sense - may you live in
interesting times)...

Norbert


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