[x,y,z]=meshgrid(-2*pi:.15:2*pi, -2*pi:.15:2*pi, -2*pi:.15:2*pi);
g=(cos(x).*sin(y)+cos(y).*sin(z)+cos(z).*sin(x));
const=0;
surfcv(x,y,z,g,const)
shading interp
rotate3d on
axis off
colormap(cool)
light

