In article <WHb+MDA### [at] econymdemoncouk>, Mike Williams 
<mik### [at] econymdemoncouk> wrote:

> Wasn't it Robert Jefferson who wrote:
> 
> >How do you make drapes for a romm
> 
> I do it with isosurfaces.
> 
> I built it up like this:-
...

I prefer to use noise3d() instead of sin() or cos(), here is an example:

    function {z-
        ((noise3d(x*Freq,0,z)*2)-1)*sqrt(y)*Depth
        +((noise3d(x*Freq*5,0,z)*2)-1)*(1/(abs(y)+0.5))*Depth*0.3
    }
    threshold 0

-- 
Christopher James Huff - Personal e-mail: chr### [at] yahoocom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Web page: http://chrishuff.dhs.org/

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