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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
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Attachments:
Download 'hf_sedimentary_test.png' (486 KB)
Preview of image 'hf_sedimentary_test.png'
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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
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Attachments:
Download 'hf2iso_tga_ng3.png' (919 KB)
Preview of image 'hf2iso_tga_ng3.png'
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Thomas de Groot <tho### [at] degroot org> 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
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