A grid of 200x200x200 voxels. Generated by the following 3d pseudo-code/function: m = PI*2*(1+floor(x*5)/5*5) v = sin(x*mul+offset)+sin(y*mul+offset)+sin(z*mul+offset) where x, y and z are in the interval from 0 to 1 and the voxel is full if v is positive