I was messing around with some multifractals and came up with this. It's 
based on a crackle form <1,0,0> repeated like a perlin multi-fractal over 8 
octaves. The heightfield renders pretty quick (19 minutes) but the isosurfae 
took an amazing 9 hours!

Here's the code for the pattern, the Curve value adjusts how the holes look. 
Have a look at p.b.a to see what happens when I animate that value!:

pigment {
 #local Curve=1/8; // small values make it look porous
 #local Omega=0.5;
 #local Lambda=2;
 #local Octaves=8;
 pigment_pattern {
  average
  pigment_map {
   #local octave=0;
   #while ( octave < Octaves )
    [pow(Omega,octave)
     pigment_pattern {
      crackle form <.9,0,0>
      scale pow(Lambda,-octave)
      colour_map {[0 rgb 1][1 rgb 0]}
     }
     poly_wave 1/Curve
    ]
    #local octave=octave+1;
   #end
  }
 }
 poly_wave Curve
 colour_map {[0 rgb 1][1 rgb 0]}
}


-- 
Tek
http://evilsuperbrain.com

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Attachments:
Download 'sponge-b.jpg' (111 KB) Download 'sponge-a.jpg' (82 KB)

Preview of image 'sponge-b.jpg'

Preview of image 'sponge-a.jpg'

Tek napsal(a):
> I was messing around with some multifractals and came up with this. It's 
> based on a crackle form <1,0,0> repeated like a perlin multi-fractal over 8 
> octaves. The heightfield renders pretty quick (19 minutes) but the isosurfae 
> took an amazing 9 hours!
> 
> Here's the code for the pattern, the Curve value adjusts how the holes look. 
> Have a look at p.b.a to see what happens when I animate that value!:
> 
I really like it. It looks a bit like a solidified lava.

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"Tek" <tek### [at] evilsuperbraincom> wrote:
> I was messing around with some multifractals and came up with this. It's

Lovely! Karst and pumice. :)

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"Tek" <tek### [at] evilsuperbraincom> wrote:
> I was messing around with some multifractals and came up with this. It's
> based on a crackle form <1,0,0> repeated like a perlin multi-fractal over 8
> octaves. The heightfield renders pretty quick (19 minutes) but the isosurfae
> took an amazing 9 hours!


I've been trying (unsuccessfully) to come up with something like this for
awhile; thanks for sharing it.
Nicely done.

Ken W.

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I rendered a detailed version! It took an impressive 3.5 days!!!

-- 
Tek
http://evilsuperbrain.com


"Tek" <tek### [at] evilsuperbraincom> wrote in message
news:486e82e5@news.povray.org...
>I was messing around with some multifractals and came up with this. It's
> based on a crackle form <1,0,0> repeated like a perlin multi-fractal over
> 8
> octaves. The heightfield renders pretty quick (19 minutes) but the
> isosurfae
> took an amazing 9 hours!
>
> Here's the code for the pattern, the Curve value adjusts how the holes
> look.
> Have a look at p.b.a to see what happens when I animate that value!:
>
> pigment {
> #local Curve=1/8; // small values make it look porous
> #local Omega=0.5;
> #local Lambda=2;
> #local Octaves=8;
> pigment_pattern {
>  average
>  pigment_map {
>   #local octave=0;
>   #while ( octave < Octaves )
>    [pow(Omega,octave)
>     pigment_pattern {
>      crackle form <.9,0,0>
>      scale pow(Lambda,-octave)
>      colour_map {[0 rgb 1][1 rgb 0]}
>     }
>     poly_wave 1/Curve
>    ]
>    #local octave=octave+1;
>   #end
>  }
> }
> poly_wave Curve
> colour_map {[0 rgb 1][1 rgb 0]}
> }
>
>
> -- 
> Tek
> http://evilsuperbrain.com
>
>
>

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Attachments:
Download 'sponge_detail.jpg' (570 KB)

Preview of image 'sponge_detail.jpg'

> I rendered a detailed version! It took an impressive 3.5 days!!!
> 
> 

Wow! The result is worth the long wait.


tuabiht

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3 days... on what hardware?

Rarius

"Tek" <tek### [at] evilsuperbraincom> wrote in message 
news:4873ce68@news.povray.org...
>I rendered a detailed version! It took an impressive 3.5 days!!!
>
> -- 
> Tek
> http://evilsuperbrain.com
>
>
> "Tek" <tek### [at] evilsuperbraincom> wrote in message
> news:486e82e5@news.povray.org...
>>I was messing around with some multifractals and came up with this. It's
>> based on a crackle form <1,0,0> repeated like a perlin multi-fractal over
>> 8
>> octaves. The heightfield renders pretty quick (19 minutes) but the
>> isosurfae
>> took an amazing 9 hours!
>>
>> Here's the code for the pattern, the Curve value adjusts how the holes
>> look.
>> Have a look at p.b.a to see what happens when I animate that value!:
>>
>> pigment {
>> #local Curve=1/8; // small values make it look porous
>> #local Omega=0.5;
>> #local Lambda=2;
>> #local Octaves=8;
>> pigment_pattern {
>>  average
>>  pigment_map {
>>   #local octave=0;
>>   #while ( octave < Octaves )
>>    [pow(Omega,octave)
>>     pigment_pattern {
>>      crackle form <.9,0,0>
>>      scale pow(Lambda,-octave)
>>      colour_map {[0 rgb 1][1 rgb 0]}
>>     }
>>     poly_wave 1/Curve
>>    ]
>>    #local octave=octave+1;
>>   #end
>>  }
>> }
>> poly_wave Curve
>> colour_map {[0 rgb 1][1 rgb 0]}
>> }
>>
>>
>> -- 
>> Tek
>> http://evilsuperbrain.com
>>
>>
>>
>
>
>
>

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Rarius napsal(a):

I think a lot of time was taken by radiosity
> 3 days... on what hardware?
> 
> Rarius
> 
> "Tek" <tek### [at] evilsuperbraincom> wrote in message 
> news:4873ce68@news.povray.org...
>> I rendered a detailed version! It took an impressive 3.5 days!!!
>>
>> -- 
>> Tek
>> http://evilsuperbrain.com
>>
>>
>> "Tek" <tek### [at] evilsuperbraincom> wrote in message
>> news:486e82e5@news.povray.org...
>>> I was messing around with some multifractals and came up with this. It's
>>> based on a crackle form <1,0,0> repeated like a perlin multi-fractal over
>>> 8
>>> octaves. The heightfield renders pretty quick (19 minutes) but the
>>> isosurfae
>>> took an amazing 9 hours!


-- 
You know you've been raytracing too long when...
you ever saw a beautiful scenery and regretted not to take your 6" 
reflective ball and a digital camera, thinking "this would have been a 
perfect light probe"
		-Johnny D
Johnny D

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"Rarius" <rar### [at] rariuscouk> wrote in message 
news:4873fa68$1@news.povray.org...
>3 days... on what hardware?

Intel Core2 Quad CPU, Q6600 @ 2.40GHz (my work PC)
Though it was rendered in Megapov, so it only used 1 of those 4 cores

The time is taken because it's based on the crackle pigment - one of 
povray's slowest patterns - and I'm reading from that multiple times (once 
per octave, and 10 octaves for that picture). On top of that there's the 
huge resolution, anti-aliasing, radiosity, and high max_gradient in the 
isosurface.

-- 
Tek
http://evilsuperbrain.com

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"Tek" <tek### [at] evilsuperbraincom> wrote:
> I rendered a detailed version! It took an impressive 3.5 days!!!

Wow Tek, this is really gorgeous! I'm gonna render one for a few days myself :)

-Rob

"There is no spoon."

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