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28 Mar 2024 16:58:55 EDT (-0400)
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From: Thomas de Groot
Subject: Re: Continental Hub
Date: 19 Oct 2018 02:55:41
Message: <5bc97fed@news.povray.org>
On 18-10-2018 19:12, Alain wrote:
> 
> Very nice.
> My nit picks :
> To the right, just in front of the tree, there is a boulder that float 
> slightly over the ground.
> Next, there are two boulders standing up in an impossible position : 
> Centre of gravity is not over the area of contact with the ground.
> 

They are in the process of being hunted down.

-- 
Thomas


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From: Thomas de Groot
Subject: Re: Continental Hub
Date: 19 Oct 2018 03:09:24
Message: <5bc98324$1@news.povray.org>
On 18-10-2018 21:07, Kenneth wrote:
> Thomas de Groot <tho### [at] degrootorg> wrote:
>>
>> The President of the United States In Exile (POTUSIE)...
> 
> LOL!

Ah well... People do not change, do they? ;-)

> 
> The image is beautiful-- lots of nice detail and realism. Kudos!

Thank you indeed.

> 
> For the rocks, I would suggest burying them into the ground a little bit.
> Assuming they have been there for ages(?), the natural wind erosion of the
> ground around them would have filled in some dirt and sand. Or maybe they are
> 'fresh', from some kind of recent Earth-shattering explosion?

Yes, I was also thinking into that line. The idea is whether the ground 
is mostly soft or mostly hard. It probably is in-between as the slope 
represents some ancient scree surface. So, more burial of the rocks is 
indicated indeed. I have already been working into that direction.

> 
> Nice textures for the rocks, btw.
> 

Honour where honours are due: this particular texture (as well as the 
vegetation) came from a scene by Cedeaq:
http://news.povray.org/povray.general/thread/%3C4ca93948%40news.povray.org%3E/?ttop=371487&toff=200&mtop=351355

His post is the last one in this thread.

I had "rediscovered" his code and used it in:
https://news.povray.org/povray.binaries.images/thread/%3C5b2b5b9a%40news.povray.org%3E/

-- 
Thomas


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From: Thomas de Groot
Subject: Re: Continental Hub
Date: 19 Oct 2018 03:22:05
Message: <5bc9861d$1@news.povray.org>
On 19-10-2018 2:05, Bald Eagle wrote:
> Thomas de Groot <tho### [at] degrootorg> wrote:
> 
>> A few comments about the image:
>> - Bald Eagle is thanked for little code that renders "an alternative
>> spiral". It is the basis for the rocky outcrop height_field.
> 
> Thanks - glad to have provided something useful.
> I would never have recognized it  :D
> 
> What does the heightfield image look like?  Did you make "an alternative
> spiral" and then blur it to get the tapering into the plain?

I took the image rendered by your code as basis for further work in the 
GeoControl program, which transformed it into a /real/ height_field. As 
a next step in POV-Ray, I added a second height_field for the near 
plain, and a simple disk{} to join to the sphere representing the sky 
(distance is 10e4 pov units).

> 
> 
>> - One million trees (2 types) were planted to fight rising CO2 levels.
> 
> <Dr. Evil> "One MILLION trees...." </Dr. Evil>

Yes... One has to produce impressive figures to the international press 
otherwise they do not believe you. Fake news and all that, you know. :-)

> 
> I think that phytoplankton, prairie grasses, and cannabis sativa (that other
> grass), would make a far bigger dent, much faster.

Of course! However, trees are so much more sexy!

> 
> 
>> - Fifty thousand boulders (also 2 types) were thrown to earth. Nice to
>> mention that their sizes gradually decrease with distance from the camera.
> 
> ....Why?   From where?

Oh, you know, sloppy programming, too much coffee, too little dried frog 
pills... No wonder some boulders look strange...

> Aside from that, and others comments, I'll join in with agreeing that your rock
> texture is indeed very nice.
> 
>> - The space structure was built in Silo2.
> 
> Nice.
> Though very different - it kinda reminds me of the "Kluchikov" isosurface.
> I think I'd like to see some additional renders of that.
> 

I fully agree.


-- 
Thomas


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From: Thomas de Groot
Subject: Re: Continental Hub
Date: 19 Oct 2018 03:34:28
Message: <5bc98904@news.povray.org>
On 19-10-2018 4:00, Ton wrote:
> Nice, sombre, atmosphere, Thomas.
> When I saw the picture my first thought was, what a funny clouds.
> Then I realized they must be the "artificial structure around the Earth".
> Ton.
> 
> 

Thanks indeed. Yes, the structures is intended to be tantalisingly vague.

Btw, the technique used to achieve this "out of the atmosphere" kind of 
look was initially developed by Bill Pragnell in some distant POV-Ray 
past. It is very simple to achieve with the following code:

//start code
background {rgb <0.01, 0.01, 0.01>}

// a sky sphere
sphere { <0, 0, 0>, 1
   texture {
     pigment {rgb 0 transmit 1}
     finish {diffuse 0}
   }
   interior_texture {
     pigment {
       gradient y
       color_map {
         [0.0 srgbt <0.6, 0.7, 1.0, 0.5>]
         [0.7 srgbt <0.0, 0.1, 0.8, 0.5>]
       }
     }
     finish {emission 2 diffuse 0}
   }
   scale 10e4
   hollow
   no_shadow
   no_reflection
}
//end code

The magic tricks are the transmit values of the interior_texture, and 
the strength of its emission in the finish block. Every object, being it 
a moon, a spaceship, or whatever you want, placed /outside/ of the sky 
sphere, will show up as if it was truly in space. You can add any kind 
of media to the sphere in order to simulate the atmosphere of course. I 
advice against the use of fog{} in this context.

-- 
Thomas


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From: Thomas de Groot
Subject: Re: Continental Hub
Date: 19 Oct 2018 03:35:17
Message: <5bc98935$1@news.povray.org>
On 18-10-2018 15:49, pascal wrote:
> Very Nice !
> P.

Thank you very much indeed.

-- 
Thomas


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From: Thomas de Groot
Subject: Re: Continental Hub
Date: 19 Oct 2018 07:48:57
Message: <5bc9c4a9@news.povray.org>
On 19-10-2018 9:21, Thomas de Groot wrote:
> On 19-10-2018 2:05, Bald Eagle wrote:
>> Thomas de Groot <tho### [at] degrootorg> wrote:

>> Though very different - it kinda reminds me of the "Kluchikov" 
>> isosurface.
>> I think I'd like to see some additional renders of that.
>>
> 
> I fully agree.
> 
> 

You mean this one, don't you?

-- 
Thomas


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Attachments:
Download 'ak_my favourite isosurface.png' (157 KB)

Preview of image 'ak_my favourite isosurface.png'
ak_my favourite isosurface.png


 

From: Bald Eagle
Subject: Re: Continental Hub
Date: 19 Oct 2018 08:25:00
Message: <web.5bc9cd0ea2905e00c437ac910@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:

> You mean this one, don't you?
>
> --
> Thomas

I do indeed - it looks like a concatenated ring of sting-ray/skate eggs.


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From: Stephen
Subject: Re: Continental Hub
Date: 19 Oct 2018 13:47:48
Message: <5bca18c4$1@news.povray.org>
On 19/10/2018 07:54, Thomas de Groot wrote:
> On 18-10-2018 18:30, Stephen wrote:
>>
>> I agree with green's critique plus a floating rock in front of the 
>> tree in the foreground.
>> Niggles aside it is impressive. The space structure brings to mind, 
>> the Mobius offspring of a twist drill, writ large.
>> The composition is good.
>>
> 
> Thank you indeed Stephen. The rocks need a bit of additional attention 
> but nothing to worry about. I was going to write that lighter-than-air 
> boulders were the consequence of climate change, but I am afraid nobody 
> would swallow that. ;-)
> 

Well, it is getting close to All Hallows Eve.
And you, of all people,know what happens when the rocks start levitating 
and rotating.


-- 

Regards
     Stephen


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From: Bald Eagle
Subject: Re: Continental Hub
Date: 19 Oct 2018 15:10:01
Message: <web.5bca2b7ea2905e00c437ac910@news.povray.org>
Stephen <mca### [at] aolcom> wrote:

> And you, of all people,know what happens when the rocks start levitating
> and rotating.


https://www.youtube.com/watch?v=SEB35GETFAI


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From: Stephen
Subject: Re: Continental Hub
Date: 19 Oct 2018 15:32:57
Message: <5bca3169$1@news.povray.org>
On 19/10/2018 20:07, Bald Eagle wrote:
> Stephen <mca### [at] aolcom> wrote:
> 
>> And you, of all people,know what happens when the rocks start levitating
>> and rotating.
> 
> 
> https://www.youtube.com/watch?v=SEB35GETFAI
> 
> 
> 

I was thinking more of Roger Zelazny's The Courts of Chaos. Or Sir 
Terry's stone circles.

But that will do. :)


-- 

Regards
     Stephen


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