Among other things, Slime wrote:

> The circumference of the circle which passes through a
> point x on the X-axis is, of course, 2*pi*x^2 (two pi r squared). Since,
> according to this function, the radii of the circles grows at a squared
> rate as x gets bigger, you need to take the square root of x to get even
> randomness.

Erm... the circumference is 2*pi*r, the *area* of the circle pi*r^2. Anyway, 
as far as I can tell the reasoning is right, since you're interested in the 
way the area of "infinitesimally thin" rings of radii r (or x) grows.

-- 
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby

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