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Larger images:
http://fe79.myftp.org/misc/povray/mandelbulb_iso_2.png
http://fe79.myftp.org/misc/povray/mandelbulb_iso_3.png
12.5 minutes rendering time for the wide one.
--
FE
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Attachments:
Download 'mandelbulb_iso_2.jpg' (138 KB)
Download 'mandelbulb_iso_3.jpg' (331 KB)
Preview of image 'mandelbulb_iso_2.jpg'
Preview of image 'mandelbulb_iso_3.jpg'
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wrote:
>
> Larger images:
> http://fe79.myftp.org/misc/povray/mandelbulb_iso_2.png
> http://fe79.myftp.org/misc/povray/mandelbulb_iso_3.png
>
> 12.5 minutes rendering time for the wide one.
Cool! The one at the bottom, the fractal to the 2nd from left looks the most
interesting.
--
Stefan Viljoen
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On Mon, 23 Nov 2009 17:51:37 +0100, Stefan Viljoen <pov### [at] polard com>
wrote:
> The one at the bottom, the fractal to the 2nd from left looks the most
> interesting.
It is simply the power 2 Mandelbulb. It does not look quite like the one
Daniel White showed for power 2; it may be that my version suffers from
accuracy issues. I will try a close-up of that one later.
--
FE
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"Fredrik Eriksson" wrote:
> On Mon, 23 Nov 2009 17:51:37 +0100, Stefan Viljoen wrote:
> > The one at the bottom, the fractal to the 2nd from left looks the most
> > interesting.
>
> It is simply the power 2 Mandelbulb. It does not look quite like the one
> Daniel White showed for power 2; it may be that my version suffers from
> accuracy issues. I will try a close-up of that one later.
I also think the power two is the most interesting, and have been exploring it
the last few days. I attached a 10-iteration "top" view, which looks more like
what you posted than Mr. White's. I don't know why that is. My first thought
was that voxel discretization doesn't capture the fine detail, but it appears
yours begins to do so.
In the attached view, I particularly like the Heraldic Frog on the extreme left,
and wonder what the Butterfly toward the middle right will look like after a few
more iterations. The trees are also interesting, but elsewhere on the surface
(not visible in this view) I found what appear to be a recursively infinite
number of angels, presumably dancing on the head of a pin.
I think I can get a paper out of this.
David Wagner
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Attachments:
Download 'mandelbulb2i10_top.png' (713 KB)
Preview of image 'mandelbulb2i10_top.png'
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On Mon, 23 Nov 2009 20:02:28 +0100, waggy <hon### [at] handbasketorg> wrote:
>
> I also think the power two is the most interesting, and have been
> exploring it the last few days. I attached a 10-iteration "top" view,
> which looks more like what you posted than Mr. White's. I don't know
> why that is.
It could be that we are looking at it from a different direction. The
power 2 Mandelbulb seems to have much less symmetry than is seen with the
higher powers.
> My first thought was that voxel discretization doesn't capture the
> fine detail, but it appears yours begins to do so.
Mine is a "true" isosurface, but the Mandelbulb function is a difficult
one for the isosurface code to handle, so there are trade-offs between
performance and accuracy.
--
FE
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A couple of closer views of the power 2 Mandelbulb.
Original images:
http://fe79.myftp.org/misc/povray/mandelbulb_iso_5.png
http://fe79.myftp.org/misc/povray/mandelbulb_iso_7.png
--
FE
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Attachments:
Download 'mandelbulb_iso_5.jpg' (241 KB)
Download 'mandelbulb_iso_7.jpg' (171 KB)
Preview of image 'mandelbulb_iso_5.jpg'
Preview of image 'mandelbulb_iso_7.jpg'
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Here is a closer view of the feature on the extreme right in the straight
overhead view resembling some kind of heraldic crest. This one is at 14
iterations.
Post a reply to this message
Attachments:
Download 'mb2i14_iso_herald_960.png' (585 KB)
Preview of image 'mb2i14_iso_herald_960.png'
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"waggy" <hon### [at] handbasketorg> wrote:
> Here is a closer view of the feature on the extreme right in the straight
> overhead view resembling some kind of heraldic crest. This one is at 14
> iterations.
Awesome! Just picked up on the Mandelbulb thing from Clifford Pickovers Reality
Carnival. The most bootifull things I have ever seen! Can we get some "pure
silver" renders of these things? Mercury landscapes 'n' all that?
On another note, just got 3dsmax working again and using the built-in particle
system (p-flow) managed to crash my pooter using just 420,067 particles (4 point
camera facing polygons)! POVRAY took the same system (made with spheres) and
did NOT crash at - let me just look at the number again - 920,332,986!
Go figure!
Anyway, back to the Mandelbulb - Isosurfaces being used? I would dearly love to
see the code...
8o)
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"arblick spule" <aspule> wrote:
> Anyway, back to the Mandelbulb - Isosurfaces being used?
> I would dearly love to see the code...
I posted portable C code for generating a df3 file of the Mandelbulb on page 2
of the "'Accidental' isosurface" thread, which seems to be the main Mandelbulb
thread here, for some strange reason. :)
I use its output like this:
#declare f = function{pattern{density_file df3 FName interpolate 1}}
isosurface {
function{f(x, y, z)}
contained_by{box{0, 1}}
threshold 0.5
max_gradient Max_gradient
accuracy 0.01
open
translate -0.5
}
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"arblick spule" wrote:
> Awesome! Just picked up on the Mandelbulb thing from Clifford Pickovers Reality
> Carnival. The most bootifull things I have ever seen! Can we get some "pure
> silver" renders of these things? Mercury landscapes 'n' all that?
[snip]
> Anyway, back to the Mandelbulb - Isosurfaces being used? I would dearly love to
> see the code...
Check out the "'Accidental' isosurface" thread in this newsgroup for more
images, including a couple in chrome, and some code samples. (Although it
should still work, the straight SDL function isosurface code I posted there is a
bit out of date. The new and improved version is not yet ready for prime time
or I'd post it here.)
Also, you may like to take a look at mandelbulb animations posted recently in
the animation binaries group.
http://news.povray.org/povray.binaries.animations/
~David
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