Mike you are the man! :-D

That fixed it! And I appreciate the background on why it broke in the first 
place, its always good to understand the source of any particular problem.

Thats one more 10-11yo scene file resurrected!

ian

"Mike Williams" <nos### [at] econymdemoncouk> wrote in message 
news:rlO### [at] econymdemoncouk...
> Wasn't it [GDS|Entropy] who wrote:
>>Greetings,
>>
>>Going through my old files, I found an isosurface that I used to produce a
>>very interesting shape in an old version of MegaPov I think, but using the
>>functions.inc and f_noise3d I get literally nothing. I've tried installing
>>old versions of pov and megapov, but I can't seem to locate the correct 
>>one,
>>maybe someone will recognize the syntax and be able to convert the
>>following:
>
> The problem is that that particular function relies on a feature of the
> old noise generator which was later considered to be undesirable, and
> got fixed. You can resurrect the old noise generator by using
> global_settings {noise_generator 1} but even so the details of the
> structure aren't identical to what you would have seen with MegaPov 0.3
>
>
> global_settings {noise_generator 1}
> #include "functions.inc"
>
> #if (GridCubeOn)
> #declare Foo =
> function {(f_noise3d(8*x, 12*y, .01)*f_noise3d(12*x, .01,
> 8*z)*f_noise3d(.01,8*y, 12*z))/3}
> #declare Foo1 =
>      function {f_noise3d(8*x, 12*y, .01)/3*f_noise3d(12*x,
> 8*y,.01)/3*f_noise3d(8*y, 12*z, .01)/3}
> #declare Foo2 =
> function {f_noise3d(8*x, 12*y, .01)/3*f_noise3d(12*x,
> 8*y,.01)/3*f_noise3d(8*y, 12*z, .01)/3}
>
> #declare GridCube =
> isosurface {
>  function {
>   Foo(x/1.6,y/1.6,z/1.6)
>   }
>   threshold 0.0001
>   max_gradient 2
>   contained_by {
>    box {-4, 4}
>    }
>    texture {
>     pigment {color rgb 1}
>    }
> }
>
>
> [I changed the pigment from rgb 0, because otherwise I get nothing but
> black in both MegaPov 0.3 and PovRay 3.6]
>
> -- 
> Mike Williams
> Gentleman of Leisure
>

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