300  // 300x300 pixel image
0.1 0.85  // ambient and diffuse reflection terms
-1.0 1.0 1.0  // Light source direction
30   // Sample the volume x times per ray looking for a change of sign.
5    // Take several iterations of the Bisection method.
0    // Take many iterations Newton iterations.
12  // # metaballs defined below.
1.0  //  iso-contour threshold value.
0 -.55 -.4 100 70.             // head (xc,yc,zc) lamda, sigma
-.09 -.65 -.8 2.5 500	       //eye L
.09 -.65 -.8 2.5 500	       //eye R
0 -.55 -.9 10 700		 //nose
0 -.55 -.7 2.7 500		 //nose
0 -.1 -.25 200 50.             // Body M (xc,yc,zc) lamda, sigma
-.4 -.18 -.5 1.5 20	       //arm L
.4 -.18 -.5 1.5 20	       //arm R
0 .1 -.8 2 200		 //button 1
0 -.2 -.8 2 200		 //button 2
0 .4 -.8 2 200		 //button 3
0 .5 0 200 20.             // BodyB (xc,yc,zc) lamda, sigma  

