> restart:

> x:=(cos(u)*cos(v))^3:

> y:=(sin(u)*cos(v))^3:

> z:=(sin(v))^3:

> plot3d([x,y,z],u=0..Pi,v=0..2*Pi,grid=[50,30],color=COLOR(RGB,0.3,0.6,0.4),
scaling=constrained);