Bill DeWitt wrote:
>     It probably really is, but to get to the bottom in the diminishing space
> available, while still varying in xy, it can't look like it is very much.
> You may need more z in your randomness rather than more randomness in your
> z.

Er...huh?  The Z isn't random.  How do I know?

observe figure 1, which uses following:
sphere_sweep{
#declare points=100;
cubic_spline points,
#declare Seed=seed(10000);
#declare N=1;
#while(N<=points)
#declare Theta=rand(Seed)*360;
#declare Z=(N/100)+1.2;
#declare R=(rand(Seed)*0.25)+((Z-1.2)*(Z-1.2)*2);
#declare X=R*cos(Theta);
#declare Y=R*sin(Theta);
<X, Y, Z> 0.02
#declare N=N+1;
#end
texture{ pigment{ color rgb <1.0, 1.0, 1.0> } }
}

observe figure 2, which uses following:
sphere_sweep{
#declare points=100;
cubic_spline points,
#declare Seed=seed(10000);
#declare N=1;
#while(N<=points)
#declare Theta=rand(Seed)*360;
#declare Z=rand(Seed)+1.2;
#declare R=(rand(Seed)*0.25)+((Z-1.2)*(Z-1.2)*2);
#declare X=R*cos(Theta);
#declare Y=R*sin(Theta);
<X, Y, Z> 0.02
#declare N=N+1;
#end
texture{ pigment{ color rgb <1.0, 1.0, 1.0> } }
}

I want the jumbled-upness of figure 2 in the shape of
figure 1.  figure 2 has the random points, but they're
selected in such a way that parts of the sphere_sweep
are drawin outside the curve.

-- 
Tim Cook
http://empyrean.scifi-fantasy.com
mirror: http://personal.lig.bellsouth.net/lig/z/9/z993126

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