POV-Ray : Newsgroups : povray.binaries.images : Inselberg Country Server Time
25 Jan 2022 18:22:43 EST (-0500)
  Inselberg Country (Message 1 to 8 of 8)  
From: Thomas de Groot
Subject: Inselberg Country
Date: 2 Dec 2021 11:13:26
Message: <61a8f0a6$1@news.povray.org>
Experimenting with different utilities, This scene is a combination of:

1) strands.exe by Sam Benge 
https://news.povray.org/povray.binaries.utilities/thread/%3Cweb.4c8d4d9b76e12d9dc003acd0%40news.povray.org%3E/?ttop=429399&toff=50

2) hf2iso by Jaime Vives Piqueres 
http://www.ignorancia.org/index.php/technical/tools-objects/heightfield-based-isosurfaces/

which, over the years, I have gradually adapted to my needs without 
changing the basic structure.

3) lightsys IV also by Jaime 
http://www.ignorancia.org/en/index.php?page=Lightsys


-- 
Thomas


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From: Samuel B 
Subject: Re: Inselberg Country
Date: 4 Dec 2021 18:35:00
Message: <web.61abfa85727bc175cb705ca46e741498@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:
> Experimenting with different utilities, This scene is a combination of:
>
> 1) strands.exe by Sam Benge
>
https://news.povray.org/povray.binaries.utilities/thread/%3Cweb.4c8d4d9b76e12d9dc003acd0%40news.povray.org%3E/?ttop=4
29399&toff=50
>
> 2) hf2iso by Jaime Vives Piqueres
>
http://www.ignorancia.org/index.php/technical/tools-objects/heightfield-based-isosurfaces/
> which, over the years, I have gradually adapted to my needs without
> changing the basic structure.
>
> 3) lightsys IV also by Jaime
> http://www.ignorancia.org/en/index.php?page=Lightsys

It looks good, Thomas. I had to look up inselbergs... It's a fitting
description.

I've always wanted to find a way to add overhangs cutting into the surfaces of
such structures, but no solution is easy. Even when using isosurfaces, the
function always extends upward and not outward. I've got an idea how overhangs
and grooves could be accomplished, but it is very expensive, time-wise.

Sam


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From: Thomas de Groot
Subject: Re: Inselberg Country
Date: 5 Dec 2021 02:21:20
Message: <61ac6870@news.povray.org>
Op 05/12/2021 om 00:32 schreef Samuel B.:
> It looks good, Thomas. I had to look up inselbergs... It's a fitting
> description.
> 
Thanks indeed Sam.

> I've always wanted to find a way to add overhangs cutting into the surfaces of
> such structures, but no solution is easy. Even when using isosurfaces, the
> function always extends upward and not outward. I've got an idea how overhangs
> and grooves could be accomplished, but it is very expensive, time-wise.
> 

Jaime's hf2iso does a fair job on this by generating a slope map from 
the image. It is relatively fast too to use. I do not have a good 
example of the marked stratification it provides on this computer; I 
shall post one later today.

The present scene does no really show the stratification for some reason 
that I am investigating. It has to do I guess with the somewhat 
exaggerated vertical scale left over from the strands image in the first 
place. This might be somewhat corrected by a blurred image map. I shall 
see how it goes.

-- 
Thomas


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From: Thomas de Groot
Subject: Re: Inselberg Country
Date: 5 Dec 2021 03:32:56
Message: <61ac7938@news.povray.org>
As promised.

-- 
Thomas


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From: Samuel B 
Subject: Re: Inselberg Country
Date: 5 Dec 2021 18:55:00
Message: <web.61ad5087727bc175cb705ca46e741498@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:
> As promised.
> (...)

Wow, the structure of the landscape is great. And the isosurface foliage looks
decent as well. Are you using radiosity for that, or fill lights? If not
radiosity, then there might be a way to make it work well in such a scene whilst
still keeping the render times acceptably low. (Basically: low count, low
error_bound, lowish aa settings and maybe some focal blur for extra samples.)

Anyway, you're managing to inspire me. Now all I need to do is stop being lazy
;)

Sam


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From: Thomas de Groot
Subject: Re: Inselberg Country
Date: 6 Dec 2021 02:25:27
Message: <61adbae7$1@news.povray.org>
Op 06/12/2021 om 00:51 schreef Samuel B.:
> Thomas de Groot <tho### [at] degrootorg> wrote:
>> As promised.
>> (...)
> 
> Wow, the structure of the landscape is great. And the isosurface foliage looks
> decent as well. Are you using radiosity for that, or fill lights? If not
> radiosity, then there might be a way to make it work well in such a scene whilst
> still keeping the render times acceptably low. (Basically: low count, low
> error_bound, lowish aa settings and maybe some focal blur for extra samples.)
> 

All credit go to Jaime, including the vegetation.

This is not a radiosity render, just a sky with appropriate finish. I 
started a radiosity render for one of those scenes and it is slow... I 
have not yet tried all the settings to make it a bit faster; that is one 
of the next batches of experimentation. The focal blur is a good 
reminder; I had almost forgot it. A stochastic render otoh, would 
probably slow the render even more in this case.

> Anyway, you're managing to inspire me. Now all I need to do is stop being lazy
> ;)
> 

Excellent! :-)

-- 
Thomas


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From: Ton
Subject: Re: Inselberg Country
Date: 6 Dec 2021 18:05:00
Message: <web.61ae9601727bc175870605757597fb06@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:
> As promised.
>
> --
> Thomas

Well done, Thomas. Now I'll have to dig out those utilities and start
experimenting as well.

Cheers
Ton


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From: Thomas de Groot
Subject: Re: Inselberg Country
Date: 7 Dec 2021 02:19:04
Message: <61af0ae8$1@news.povray.org>
Op 07/12/2021 om 00:00 schreef Ton:
> Thomas de Groot <tho### [at] degrootorg> wrote:
>> As promised.
>>
>> --
>> Thomas
> 
> Well done, Thomas. Now I'll have to dig out those utilities and start
> experimenting as well.
> 
> Cheers
> Ton
> 
> 
Thanks indeed Ton. As I wrote to Sam, all credit to Jaime. Over the 
years, I have made small changes/improvements to his code as I saw fit, 
or adapted to my own needs. Most are of no real consequence, a few 
increased render speed a bit (e.g. the 'trees').

-- 
Thomas


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