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From: Jaime Vives Piqueres
Subject: Cave concept
Date: 29 Feb 2016 05:44:56
Message: <56d42128@news.povray.org>
Hi:

     Here is a new scene on the making... a cave with stalactites and
stalagmites. The rough shape is a mesh created with Wings3d, then I
added a heighfield for the ground, and thrown some isosurface rocks
using trace(). Finally, also using trace(), I added some stalactites and
stalactites, which are cone-shaped isosurfaces. The water is currently a
simple plane, but should evolve into a heighfield. And yes, there will
be crystals there at some point, but for the moment I'm just looking for
comments/suggestions about the cave itself.

--
jaime


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From: Paolo Gibellini
Subject: Re: Cave concept
Date: 29 Feb 2016 06:19:04
Message: <56d42928$1@news.povray.org>
Jaime Vives Piqueres wrote on 29/02/2016 11.44:
> Hi:
>
>      Here is a new scene on the making... a cave with stalactites and
> stalagmites. The rough shape is a mesh created with Wings3d, then I
> added a heighfield for the ground, and thrown some isosurface rocks
> using trace(). Finally, also using trace(), I added some stalactites and
> stalactites, which are cone-shaped isosurfaces. The water is currently a
> simple plane, but should evolve into a heighfield. And yes, there will
> be crystals there at some point, but for the moment I'm just looking for
> comments/suggestions about the cave itself.
>
> --
> jaime
>
>

The scene is beautiful as usual, but in my opinion the textures are a 
bit too dark (usually the limestone is more pale) and perhaps need to be 
a bit reflective near stalactites and stalagmites in order to give a 
sense of humidity.
;-)
Paolo


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From: Thomas de Groot
Subject: Re: Cave concept
Date: 29 Feb 2016 07:22:39
Message: <56d4380f$1@news.povray.org>
On 29-2-2016 12:19, Paolo Gibellini wrote:
> Jaime Vives Piqueres wrote on 29/02/2016 11.44:
>> Hi:
>>
>>      Here is a new scene on the making... a cave with stalactites and
>> stalagmites. The rough shape is a mesh created with Wings3d, then I
>> added a heighfield for the ground, and thrown some isosurface rocks
>> using trace(). Finally, also using trace(), I added some stalactites and
>> stalactites, which are cone-shaped isosurfaces. The water is currently a
>> simple plane, but should evolve into a heighfield. And yes, there will
>> be crystals there at some point, but for the moment I'm just looking for
>> comments/suggestions about the cave itself.
>>
>> --
>> jaime
>>
>>
>
> The scene is beautiful as usual, but in my opinion the textures are a
> bit too dark (usually the limestone is more pale) and perhaps need to be
> a bit reflective near stalactites and stalagmites in order to give a
> sense of humidity.
> ;-)
> Paolo
>

I agree with Paolo. Here there seems to be a lot of iron in the water ;-)

I happened to read/watch about the Frasassi Caves in Le Marche in Italy 
a couple of days ago. There are those beautiful lace-like stalactite 
structures which I would like to see. Also, of course, a bit of 
translucency.

-- 
Thomas


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From: Jaime Vives Piqueres
Subject: Re: Cave concept
Date: 29 Feb 2016 07:36:52
Message: <56d43b64$1@news.povray.org>
El 29/02/16 a las 12:19, Paolo Gibellini escribió:
> The scene is beautiful as usual, but in my opinion the textures are a
>  bit too dark (usually the limestone is more pale) and perhaps need
> to be a bit reflective near stalactites and stalagmites in order to
> give a sense of humidity.

   Good points, thanks... the first one should be easy to fix, but the
second is going to be a render-time-nightmare.

--
jaime


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From: Jaime Vives Piqueres
Subject: Re: Cave concept
Date: 29 Feb 2016 07:40:10
Message: <56d43c2a@news.povray.org>
El 29/02/16 a las 13:22, Thomas de Groot escribió:
> I happened to read/watch about the Frasassi Caves in Le Marche in
> Italy a couple of days ago. There are those beautiful lace-like
> stalactite structures which I would like to see. Also, of course, a
> bit of translucency.

    Well, after looking at images from these amazing caves, I hope you're
joking... it would be terrifically difficult to go for something even
remotely resembling that.

   And I better will do I as I've not heard about translucency on
isosurfaces... :)

--
jaime


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From: clipka
Subject: Re: Cave concept
Date: 29 Feb 2016 08:44:06
Message: <56d44b26$1@news.povray.org>
Am 29.02.2016 um 11:44 schrieb Jaime Vives Piqueres:
> 
>     Here is a new scene on the making... a cave with stalactites and
> stalagmites. The rough shape is a mesh created with Wings3d, then I
> added a heighfield for the ground, and thrown some isosurface rocks
> using trace(). Finally, also using trace(), I added some stalactites and
> stalactites, which are cone-shaped isosurfaces.

Stalactites and stalactites, and I guess more stalactites, right? And of
course stalactites ;)

Looks fascinating.


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From: Stephen
Subject: Re: Cave concept
Date: 29 Feb 2016 08:54:31
Message: <56d44d97$1@news.povray.org>
On 2/29/2016 12:40 PM, Jaime Vives Piqueres wrote:
>     Well, after looking at images from these amazing caves, I hope you're
> joking... it would be terrifically difficult to go for something even
> remotely resembling that.


They do use coloured lights around the rocks and in the water, you know. :-)

-- 

Regards
     Stephen


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From: Norbert Kern
Subject: Re: Cave concept
Date: 29 Feb 2016 09:45:01
Message: <web.56d4591fa0304854823f4a0f0@news.povray.org>
Jaime Vives Piqueres <jai### [at] ignoranciaorg> wrote:
> Hi:
>
>      for the moment I'm just looking for
> comments/suggestions about the cave itself.


It's dark in caves - therefore I'm used to cave images lighted with torches,
head lamps or other other point lights. I expect strong specular reflections and
light fading - especially in humid caves.

With this lighting the cave looks "flat" - I'm sure you are aware of this.


Norbert


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From: Bald Eagle
Subject: Re: Cave concept
Date: 29 Feb 2016 11:05:01
Message: <web.56d46b08a03048545e7df57c0@news.povray.org>
I'd say that shape-wise, you're off to a good start so far.

Your material texturing probably needs to have some more --- differentiation.
In my mind's eye, I conceive of layers and strata and veins of different
minerals and sediments, and oxides, and benthic layers, etc.
The homogeneous red-rust-brown looks like someone sprayed it with pigment or
rusty water.   I had a shower supplied by a dug well that looked like that.   :O

as for real caves - browse around and see what _you_ think.
https://www.google.com/search?q=caves&rlz=1C1AFAA_enUS660US660&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwivuvDQqp3LAhX
C9h4KHZLNBRsQsAQIHA&biw=1366&bih=705

I have no doubt that you'll come up with something visually stunning, inspiring,
and something to learn from and aspire towards - as usual.  :)


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From: Stephen
Subject: Re: Cave concept
Date: 29 Feb 2016 11:23:23
Message: <56d4707b@news.povray.org>
On 2/29/2016 2:44 PM, Norbert Kern wrote:
> It's dark in caves -
>
> Norbert

Just a gentle reminder that TC-RTC finishes today (GMT) and all entries 
need to be rated. :-)

-- 

Regards
     Stephen


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