An experiment with ridged multifractels,isosurfaces and the trace function.

The landscape is a ridged multifunction, the trees are isosurface cones with
noise added and the rocks are spheres with noise added.

The whole lot placed with the trace function.

Mick

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Attachments:
Download 'ridges.jpg' (93 KB)

Preview of image 'ridges.jpg'

Hi Mick

Good work! Perhaps you can flatten the landscape a bit (just my
opinion). Is there water below the fog in the valley?
If I got it right, this scene uses only three types of objects:
landscape function, cones, spheres, water plane? It seems that your
scene is completely procedural. So does it mean that I can move over the
surface endlessly (O.K. maybe to some extend)?
How about the stats?
Questions over questions...

Karl

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great landscape but please do something with that sky!...

Mick Hazelgrove wrote:

> An experiment with ridged multifractels,isosurfaces and the trace function.
>
> The landscape is a ridged multifunction, the trees are isosurface cones with
> noise added and the rocks are spheres with noise added.
>
> The whole lot placed with the trace function.
>
> Mick
>
> *************************************************************
>        http://www.minda.swinternet.co.uk/index.htm
>
> *************************************************************
>
>  [Image]

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That's a lot of isosurfaces... Won't it be slow?

Margus

Mick Hazelgrove wrote:
> 
> An experiment with ridged multifractels,isosurfaces and the trace function.
> 
> The landscape is a ridged multifunction, the trees are isosurface cones with
> noise added and the rocks are spheres with noise added.
> 
> The whole lot placed with the trace function.
> 
> Mick
>

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In article <38C3CE4F.58AD268A@peak.edu.ee>, Margus Ramst 
<mar### [at] peakeduee> wrote:

> That's a lot of isosurfaces... Won't it be slow?

Not necessarily...the speed of an isosurface can vary a lot. Some are 
faster than most of the other shapes available(isosurface 
superellipsoids are faster than ordinary superellipsoids, for example). 
Others are extremely slow. In my experience, avoiding functions with 
high slope helps a lot. These seem pretty simple, noise3d() displaced 
cones, spheres, etc. They should render pretty fast if only one 
noise3d() is used. I don't know about the ridged multifractal though...I 
have never used it.

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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I like the vein effect in the mountains... most realistic... the misty mountain
lake is beautiful where is the waterfall...??


Mick Hazelgrove wrote:

> An experiment with ridged multifractels,isosurfaces and the trace function.
>
> The landscape is a ridged multifunction, the trees are isosurface cones with
> noise added and the rocks are spheres with noise added.
>
> The whole lot placed with the trace function.
>
> Mick
>
> *************************************************************
>        http://www.minda.swinternet.co.uk/index.htm
>
> *************************************************************
>
>  [Image]

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Hi all

This was just an experiment - not meant as a finished piece. The ridged
multifractal is slow to render - this is 2 ridged multifractals added
together and takes, with everything else, about six hours to render. The
biggest problem was scaling trace to trace a surface bigger than one unit.
It would be possible to make the landscape much bigger. The waterfall is a
good idea and I agree the sky would need lots of work if I was ever to
finish this piece. It was posted to give people an idea of what they might
do with the ridged multifractal.

Mick
*************************************************************
       http://www.minda.swinternet.co.uk/index.htm

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"Chris Huff" <chr### [at] yahoocom> wrote in message
news:chrishuff_99-C9F81A.11222506032000@news.povray.org...
> In article <38C3CE4F.58AD268A@peak.edu.ee>, Margus Ramst
> <mar### [at] peakeduee> wrote:
>
> > That's a lot of isosurfaces... Won't it be slow?
>
> Not necessarily...the speed of an isosurface can vary a lot. Some are
> faster than most of the other shapes available(isosurface
> superellipsoids are faster than ordinary superellipsoids, for example).
> Others are extremely slow. In my experience, avoiding functions with
> high slope helps a lot. These seem pretty simple, noise3d() displaced
> cones, spheres, etc. They should render pretty fast if only one
> noise3d() is used. I don't know about the ridged multifractal though...I
> have never used it.
>
> --
> Chris Huff
> e-mail: chr### [at] yahoocom
> Web page: http://chrishuff.dhs.org/

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Mick Hazelgrove skrev i meddelandet <38c40e5b@news.povray.org>...

>It was posted to give people an idea of what they might
>do with the ridged multifractal.


What's a ridged multifractal?


--ll

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Moon47 wrote:

> I like the vein effect in the mountains... most realistic... the misty mountain
> lake is beautiful where is the waterfall...??

I agree, but I think they're way to pointy. Those peaks would weather down pretty
fast.

--
___     ________________________________________________________________
 | \     |_                           <dav### [at] faricynet> <ICQ 55354965>
 |_/avid |ontaine                         http://www.faricy.net/~davidf/

"The only difference between me and a madman is that I'm not mad." -Dali

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The pointiness is kind of neat but not very realistic. Those peaks will wear
down with time!
I don't like the trees, but as just a sample pic I imagine you can do a lot more
with them.
Ground fog is excellent!

--
___     ________________________________________________________________
 | \     |_                           <dav### [at] faricynet> <ICQ 55354965>
 |_/avid |ontaine                         http://www.faricy.net/~davidf/

"The only difference between me and a madman is that I'm not mad." -Dali

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