Wasn't it Amir_ni who wrote:
>Hi,
>
>I am trying to make a special shape in povray that is made by spheres, but
>neither "intersection" nor "difference" commands cannot help me. This is the
>problem: if the position of eight spheres are in a cubic form in a way that the
>distance between neighbor sphere is less than 1.4 times the radius of 
>spheres, a
>cavity is formed in the center of cube. I want to make the shape of 
>that cavity.
>The following code contains the the coordinates of eight spheres. In advance, I
>do appreciate your help.

Difference the spheres from a box

difference {

box {d/2, -d/2}

sphere { <d/2, d/2, d/2> ,  d/1.4}
sphere { <-d/2, -d/2, -d/2> ,  d/1.4}

sphere { <-d/2, d/2, d/2> ,  d/1.4}
sphere { <d/2, -d/2, -d/2> ,  d/1.4}

sphere { <d/2, -d/2, d/2> ,  d/1.4}
sphere { <-d/2, d/2, -d/2> ,  d/1.4}

sphere { <d/2, d/2, -d/2> ,  d/1.4}
sphere { <-d/2, -d/2, d/2> ,  d/1.4}

pigment{ color rgb<1,0,0> }
}


-- 
Mike Williams
Gentleman of Leisure

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