This may seem arrogant, but when I first saw this youtube mandelbrot fractal
zoom, the texture was so familiar to me that I assumed for a moment it must
have been something I'd released for povray.

http://youtube.com/watch?v=gEw8xpb1aRA

Ever get that feeling?  IS that a famous texture that someone released
somewhere?

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Greg M. Johnson wrote:
> This may seem arrogant, but when I first saw this youtube mandelbrot fractal
> zoom, the texture was so familiar to me that I assumed for a moment it must
> have been something I'd released for povray.
> 
> http://youtube.com/watch?v=gEw8xpb1aRA
> 
> Ever get that feeling?  IS that a famous texture that someone released
> somewhere?

Huh?  http://en.wikipedia.org/wiki/Mandelbrot_fractal

Personally, I always thought the Mandelbrot set looked like a squashed 
bug.  There are prettier fractals out there.  :P

-- 
Tim Cook
http://empyrean.digitalartsuk.com

-----BEGIN GEEK CODE BLOCK-----
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GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------

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Greg M. Johnson <pte### [at] thecommononethatstartswithycom> wrote:
> This may seem arrogant, but when I first saw this youtube mandelbrot fractal
> zoom, the texture was so familiar to me that I assumed for a moment it must
> have been something I'd released for povray.

  You'd have hard time creating that animation with POV-Ray (at least without
using external programs or external precalculated image maps). That's because
in that animation the color rings of the different iterations have been
interpolated, creating smooth color gradients. POV-Ray cannot do this.

  Some fractal programs, such as xaos, support that, and that animation
may well have been done with it.

-- 
                                                          - Warp

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Tim Cook <z99### [at] gmailcom> wrote:
> Personally, I always thought the Mandelbrot set looked like a squashed 
> bug.  There are prettier fractals out there.  :P

  The whole fractal may not be all that pretty, but when you start zooming
in, and especially when you use a proper color map, things get a lot
prettier. For example, see what I have found in the Mandelbrot set:

http://warp.povusers.org/snaps/fract/

-- 
                                                          - Warp

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Warp wrote:

>   You'd have hard time creating that animation with POV-Ray (at least without
> using external programs or external precalculated image maps). That's because
> in that animation the color rings of the different iterations have been
> interpolated, creating smooth color gradients. POV-Ray cannot do this.
> 
>   Some fractal programs, such as xaos, support that, and that animation
> may well have been done with it.

More exactly: The colouring algorithm makes use of additional data from 
the orbit to produce a seamless colour gradient. (I.e., it doesn't just 
blur the lines in the colour gradient, it actually adds additional new 
detail - much like antialiasing isn't just blurring.)

At any rate, rerendering the entire frame a few thousand times is rather 
inefficient. There are all kinds of tricks you can use where you reuse 
pixels from the previous frame to vastly reduce the total time required 
for simple zooms like this.

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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Greg M. Johnson wrote:
> This may seem arrogant, but when I first saw this youtube mandelbrot fractal
> zoom, the texture was so familiar to me that I assumed for a moment it must
> have been something I'd released for povray.
> 
> http://youtube.com/watch?v=gEw8xpb1aRA
> 
> Ever get that feeling?  IS that a famous texture that someone released
> somewhere?

Not sure what you're asking here... The [quadratic] Mandelbrot set is an 
extremely well-known object, and the Internet is replete with endless 
animations and stills depicting it. Certainly there are general areas of 
it which are extremely well visited. [The negative tail, the seahorse 
valley, etc.]

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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Warp wrote:

>   The whole fractal may not be all that pretty, but when you start zooming
> in, and especially when you use a proper color map, things get a lot
> prettier.

Indeed. Some areas are prettier than others, and there's a bit of a 
knack to finding them.

> For example, see what I have found in the Mandelbrot set:
> 
> http://warp.povusers.org/snaps/fract/

...or [shameless plug]...

http://www.zazzle.com/MathematicalOrchid*

Arguably the Mandelbrot set falls into the category of things which have 
"been done now", but I still enjoy exploring it.

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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Tim Cook wrote:

> Personally, I always thought the Mandelbrot set looked like a squashed 
> bug.

Only at low res. ;-)

> There are prettier fractals out there.  :P

For example...?

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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> http://www.zazzle.com/MathematicalOrchid*

"Have a mug…"

What does that mean? ;-)

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scott wrote:

> "Have a mug…"
> 
> What does that mean? ;-)

...that Zazzle has changed their HTML rendering policy since I put the 
page together? :-/

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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