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14 May 2021 15:15:00 EDT (-0400)
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From: m@b
Subject: Beam Engine
Date: 11 Jan 2021 21:38:35
Message: <5ffd0bab@news.povray.org>
My first attempt at using radiosity.
Comment welcome.

m@


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Preview of image 'beam engine radiosity large 50pc.png'
beam engine radiosity large 50pc.png


 

From: Mr
Subject: Re: Beam Engine
Date: 12 Jan 2021 15:10:05
Message: <web.5ffe01aff4c22fe26adeaecb0@news.povray.org>
"m@b" <sai### [at] googlemailcom> wrote:
> My first attempt at using radiosity.
> Comment welcome.
>
> m@

The beams through media look very crisp and nice. here are a fex remarks in the
order that would matter most first:


There seems to be too much light from inside to have a balance that would reveal
radiosity well. Could the inside lights be dimmed ? maybe even remove with
radiosity. The scene would contrast more


Some of the colors are too saturated. (srgb? assumed_gamma?)

the reflective elements, show too strong a total reflective amounts. You can use
conserve_energy and albedo keywords to solve that.


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From: Norbert Kern
Subject: Re: Beam Engine
Date: 12 Jan 2021 16:15:00
Message: <web.5ffe10b6f4c22fe24d4aa4600@news.povray.org>
"m@b" <sai### [at] googlemailcom> wrote:
> My first attempt at using radiosity.
> Comment welcome.
>
> m@


A cool scene!

You need area light for the sun. Radiosity seems okay, perhaps a bit bright for
such small window area.

As said by Mr., colors and textures aren't very realistic - colors are extreme
and the surfaces are too clean. The metal finishes use a diffuse value like 0.6,
which is much to high. Good values are 0.05 to 0.2 together with reflection
values like reflection {0.3 metallic} or higher.


Keep up the good work,
Norbert Kern


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From: Hj  Malthaner
Subject: Re: Beam Engine
Date: 12 Jan 2021 20:08:57
Message: <5ffe4829@news.povray.org>
On 1/12/21 3:37 AM, m@b wrote:
> My first attempt at using radiosity.
> Comment welcome.

Nice work on the stained glass windows and the script-patterns on the 
pillars!

How did you make the spiral things on the lamps?

-- 
Hajo


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From: Paolo Gibellini
Subject: Re: Beam Engine
Date: 13 Jan 2021 03:57:50
Message: <5ffeb60e$1@news.povray.org>
m@b wrote on 12/01/2021 03:37:
> My first attempt at using radiosity.
> Comment welcome.
> 
> m@

A very promising scene!
Paolo


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From: Alain Martel
Subject: Re: Beam Engine
Date: 13 Jan 2021 11:50:45
Message: <5fff24e5$1@news.povray.org>
Le 2021-01-12 à 20:08, Hj. Malthaner a écrit :
> On 1/12/21 3:37 AM, m@b wrote:
>> My first attempt at using radiosity.
>> Comment welcome.
> 
> Nice work on the stained glass windows and the script-patterns on the 
> pillars!
> 
> How did you make the spiral things on the lamps?
> 

I don't know, but it could be a sphere_sweep, probably stretched in one 
direction.


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From: Hj  Malthaner
Subject: Re: Beam Engine
Date: 13 Jan 2021 17:46:55
Message: <5fff785f$1@news.povray.org>
On 1/13/21 5:50 PM, Alain Martel wrote:

> I don't know, but it could be a sphere_sweep, probably stretched in one 
> direction.

Quite some times I wished PovRay had a prism or polygon sweep feature.

-- 
Some of my PovRay works:
https://www.deviantart.com/antarasol/gallery/42758766/3D


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From: m@b
Subject: Re: Beam Engine
Date: 14 Jan 2021 02:19:17
Message: <7328e96e-cec5-cd6d-510e-144790e8793a@googlemail.com>
On 13/01/2021 9:08 am, Hj. Malthaner wrote:
> On 1/12/21 3:37 AM, m@b wrote:
>> My first attempt at using radiosity.
>> Comment welcome.
> 
> Nice work on the stained glass windows and the script-patterns on the 
> pillars!
> 
> How did you make the spiral things on the lamps?
> 

It's a bunch of cylinders:


      #for(Count_1,0,410)
          cylinder{<0,0,-0.1-Count_1/410>,<0,0,0.1+Count_1/410>,0.2 
translate<Count_1/80,2,0> rotate<0,0,1.5*Count_1> }
      #end


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From: m@b
Subject: Re: Beam Engine
Date: 14 Jan 2021 02:39:55
Message: <ac97c48a-edc6-35d5-4464-17b5193f1187@googlemail.com>
On 13/01/2021 4:08 am, Mr wrote:
> "m@b" <sai### [at] googlemailcom> wrote:
>> My first attempt at using radiosity.
>> Comment welcome.
>>
>> m@
> 
> The beams through media look very crisp and nice. here are a fex remarks in the
> order that would matter most first:
> 
> 
> There seems to be too much light from inside to have a balance that would reveal
> radiosity well. Could the inside lights be dimmed ? maybe even remove with
> radiosity. The scene would contrast more
> 
> 
> Some of the colors are too saturated. (srgb? assumed_gamma?)
> 
> the reflective elements, show too strong a total reflective amounts. You can use
> conserve_energy and albedo keywords to solve that.
> 

Thanks for the comments.

I have reduced the gamma, gray_threshold and brightness.

The steel-work is now a darker pigment and less reflective.

Getting there slowly, this radiosity thing is complicated :-)

m@


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Attachments:
Download 'beam engine radiosity.png' (1239 KB)

Preview of image 'beam engine radiosity.png'
beam engine radiosity.png


 

From: m@b
Subject: Re: Beam Engine
Date: 14 Jan 2021 02:49:51
Message: <30f32358-b8fa-2b34-8060-4fa22f24b440@googlemail.com>
On 13/01/2021 9:08 am, Hj. Malthaner wrote:
> On 1/12/21 3:37 AM, m@b wrote:
>> My first attempt at using radiosity.
>> Comment welcome.
> 
> Nice work on the stained glass windows and the script-patterns on the 
> pillars!
> 

The Stained glass windows and pillar decorations are lifted from photos 
on the internet :-)

e.g <https://venues4hire.org/venue/details/14199/papplewick-pumping-station>


m@


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