POV-Ray : Newsgroups : povray.binaries.images : Heightfields of sediment layers Server Time
22 Sep 2023 21:44:58 EDT (-0400)
  Heightfields of sediment layers (Message 1 to 3 of 3)  
From: Thomas de Groot
Subject: Heightfields of sediment layers
Date: 18 Sep 2023 09:04:25
Message: <65084ad9@news.povray.org>
Following the discussion p.a-u on how to generate sediment layering 
without immediately requiring the use of isosurfaces, I have been 
playing a bit with different ideas.

First, in order to focus on something tangible, I got two Real World 
examples:
https://geologylearn.blogspot.com/2015/11/sedimentary-structures.html
https://blogs.egu.eu/divisions/ts/2019/12/27/features-from-the-field-bedding-stratification/

Then, I used Gimp to draw a rough b/w image. This image I loaded into 
GeoControl, my old heightfield generator, and exported a .tga image_map 
that I could use as height_field in POV.

A tentative result is attached here. Not bad for a first,I think. :-)

Note: Jaime Vives Piqueres is the author of hf2iso. I can recommend it 
if you want to play with isosurface landscapes.

-- 
Thomas


Post a reply to this message


Attachments:
Download 'hf_sedimentary_test.png' (486 KB)

Preview of image 'hf_sedimentary_test.png'
hf_sedimentary_test.png


 

From: Thomas de Groot
Subject: Re: Heightfields of sediment layers
Date: 21 Sep 2023 02:39:04
Message: <650be508@news.povray.org>
Op 18/09/2023 om 15:04 schreef Thomas de Groot:
> Note: Jaime Vives Piqueres is the author of hf2iso. I can recommend it 
> if you want to play with isosurface landscapes.
> 

As an illustration of this, I include here an example rock face I 
rendered while testing, back in 2020.

-- 
Thomas


Post a reply to this message


Attachments:
Download 'hf2iso_tga_ng3.png' (919 KB)

Preview of image 'hf2iso_tga_ng3.png'
hf2iso_tga_ng3.png


 

From: Samuel B 
Subject: Re: Heightfields of sediment layers
Date: 22 Sep 2023 19:10:00
Message: <web.650e1e8ab769c3e816bed5696e741498@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:
> Following the discussion p.a-u on how to generate sediment layering
> without immediately requiring the use of isosurfaces, I have been
> playing a bit with different ideas.
>
> First, in order to focus on something tangible, I got two Real World
> examples:
> https://geologylearn.blogspot.com/2015/11/sedimentary-structures.html
>
https://blogs.egu.eu/divisions/ts/2019/12/27/features-from-the-field-bedding-stratification/
>
> Then, I used Gimp to draw a rough b/w image. This image I loaded into
> GeoControl, my old heightfield generator, and exported a .tga image_map
> that I could use as height_field in POV.
>
> A tentative result is attached here. Not bad for a first,I think. :-)
>
> Note: Jaime Vives Piqueres is the author of hf2iso. I can recommend it
> if you want to play with isosurface landscapes.
>
> --
> Thomas

It looks very promising, Thomas! Any idea yet how you would go about
constructing an entire feature (e.g. cliffside in a landscape)?

The links you posted are quite inspiring. The first image in the first link is
something I've tried to do, but always seem to fail at. Later on that page, I
was amazed to see that sand ripples could be captured in such a way.

Ultimately, nothing will beat a full 3d simulation using voxels or similar, but
who's got the hardware for that? (Or the algorithms? ;P)

Btw, they mentioned Zion National Park. Did you ever get to go there? I was
there when I was six, on a road trip my dad took us on when following a
meandering path to Montana. Zion was my favorite out of all the places we
visited. The reddish cliffs were pure eye candy. I was hoping to see some desert
sandstone plateaus, but we never passed through any such areas :(

Sam


Post a reply to this message

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.