POV-Ray : Newsgroups : povray.binaries.scene-files : @MichaelJF: sample of Rock texture from "Crossing Border" scene Server Time: 16 Jun 2019 07:51:42 GMT
  @MichaelJF: sample of Rock texture from "Crossing Border" scene (Message 1 to 5 of 5)  
From: Thomas de Groot
Subject: @MichaelJF: sample of Rock texture from "Crossing Border" scene
Date: 29 Jan 2019 12:33:19
Message: <5c50480f@news.povray.org>
Finally. I had to strongly clean up my code as successive additions, 
changes, tweakings, had made it - at least working for the Crossing 
Border scene - but not for any other one.

Here is a test landscape scene, in addition to the bump_map I used which 
may not be the best for the purpose. A better one should be generated 
one day. I think about that. However, it works fine as-is.

-- 
Thomas


Post a reply to this message


Attachments:
Download 'mjf_rocks.7z.zip' (2770 KB)

From: MichaelJF
Subject: Re: @MichaelJF: sample of Rock texture from "Crossing Border" scene
Date: 22 Feb 2019 18:52:36
Message: <5c7044f4$1@news.povray.org>
Am 29.01.2019 um 13:33 schrieb Thomas de Groot:
> Finally. I had to strongly clean up my code as successive additions, 
> changes, tweakings, had made it - at least working for the Crossing 
> Border scene - but not for any other one.
> 
> Here is a test landscape scene, in addition to the bump_map I used which 
> may not be the best for the purpose. A better one should be generated 
> one day. I think about that. However, it works fine as-is.
> 
Hi Thomas,
many, many thanks for your work. I was distracted a while from the 
POV-newsgroups by occupational issues unfortunatelly, but not inactive 
completelly. I soon found a spot in your scene suiting my needs to have 
a better scene to present my idea to model steam fog. Your texture is 
great seen at a certain distance, as my steam fog approach is, but at a 
close distance both approaches have their limits. May I ask you what 
kind of rock you tried to model specifically? A sort of sedimentary rock 
I would presume. But you are the geologist and can give hints to your 
model. As a statistician I can do guesswork only.

Best regards
Michael


Post a reply to this message

From: Thomas de Groot
Subject: Re: @MichaelJF: sample of Rock texture from "Crossing Border" scene
Date: 23 Feb 2019 07:56:14
Message: <5c70fc9e$1@news.povray.org>
On 22-2-2019 19:52, MichaelJF wrote:
> Am 29.01.2019 um 13:33 schrieb Thomas de Groot:
>> Finally. I had to strongly clean up my code as successive additions, 
>> changes, tweakings, had made it - at least working for the Crossing 
>> Border scene - but not for any other one.
>>
>> Here is a test landscape scene, in addition to the bump_map I used 
>> which may not be the best for the purpose. A better one should be 
>> generated one day. I think about that. However, it works fine as-is.
>>
> Hi Thomas,
> many, many thanks for your work. I was distracted a while from the 
> POV-newsgroups by occupational issues unfortunatelly, but not inactive 
> completelly. I soon found a spot in your scene suiting my needs to have 
> a better scene to present my idea to model steam fog. Your texture is 
> great seen at a certain distance, as my steam fog approach is, but at a 
> close distance both approaches have their limits. May I ask you what 
> kind of rock you tried to model specifically? A sort of sedimentary rock 
> I would presume. But you are the geologist and can give hints to your 
> model. As a statistician I can do guesswork only.
> 

Yes, the limitations of my rock approach derive almost entirely from the 
use of a bump_map.A much better approach would be using an isosurface, 
as the layered rocks are better modelled by functions. I think I have 
done things like that in my long dormant (dead?) Geomorph macros, more 
than ten years ago.

The rocks are supposed to be sedimentary deposits, very typical in 
particular for the Jurassic and Cretaceous period of the Alpine regions. 
When I was a student, we called them "pyjama formations", which tells my 
age as I do not see any stripped pyjamas any more in modern stores, and 
with the exception of quaint humoristic movies from a certain period...  :-)

-- 
Thomas


Post a reply to this message

From: Jörg "Yadgar" Bleimann
Subject: Re: @MichaelJF: sample of Rock texture from "Crossing Border" scene
Date: 23 Feb 2019 08:46:37
Message: <5c71086d@news.povray.org>
Hi(gh)!

On 23.02.19 08:56, Thomas de Groot wrote:

> The rocks are supposed to be sedimentary deposits, very typical in 
> particular for the Jurassic and Cretaceous period of the Alpine regions. 
> When I was a student, we called them "pyjama formations", which tells my 
> age as I do not see any stripped pyjamas any more in modern stores, and 
> with the exception of quaint humoristic movies from a certain period...  

They are still sold (possibly a hipster thing), while not my style either...

See you in Khyberspace!

Yadgar

Now playing: Te Recuerdo Amanda (Joan Baez)


Post a reply to this message

From: MichaelJF
Subject: Re: @MichaelJF: sample of Rock texture from "Crossing Border" scene
Date: 24 Feb 2019 18:57:20
Message: <5c72e910$1@news.povray.org>
Am 23.02.2019 um 08:56 schrieb Thomas de Groot:
> On 22-2-2019 19:52, MichaelJF wrote:
>> Am 29.01.2019 um 13:33 schrieb Thomas de Groot:
>>> Finally. I had to strongly clean up my code as successive additions, 
>>> changes, tweakings, had made it - at least working for the Crossing 
>>> Border scene - but not for any other one.
>>>
>>> Here is a test landscape scene, in addition to the bump_map I used 
>>> which may not be the best for the purpose. A better one should be 
>>> generated one day. I think about that. However, it works fine as-is.
>>>
>> Hi Thomas,
>> many, many thanks for your work. I was distracted a while from the 
>> POV-newsgroups by occupational issues unfortunatelly, but not inactive 
>> completelly. I soon found a spot in your scene suiting my needs to 
>> have a better scene to present my idea to model steam fog. Your 
>> texture is great seen at a certain distance, as my steam fog approach 
>> is, but at a close distance both approaches have their limits. May I 
>> ask you what kind of rock you tried to model specifically? A sort of 
>> sedimentary rock I would presume. But you are the geologist and can 
>> give hints to your model. As a statistician I can do guesswork only.
>>
> 
> Yes, the limitations of my rock approach derive almost entirely from the 
> use of a bump_map.A much better approach would be using an isosurface, 
> as the layered rocks are better modelled by functions. I think I have 
> done things like that in my long dormant (dead?) Geomorph macros, more 
> than ten years ago.

Hi Thomas,
interesting hint, I will search my archives. IIRC you have posted it to 
the scene-files ages ago.

> The rocks are supposed to be sedimentary deposits, very typical in 
> particular for the Jurassic and Cretaceous period of the Alpine regions. 
> When I was a student, we called them "pyjama formations", which tells my 
> age as I do not see any stripped pyjamas any more in modern stores, and 
> with the exception of quaint humoristic movies from a certain period...  
> :-)
> 

Very likely you are some years senior to me but I remember this kind of 
fashion as well.

Best regards
Michael


Post a reply to this message

Copyright 2003-2008 Persistence of Vision Raytracer Pty. Ltd.