Three-dimensional visualization of the magnetic field viewed from above. The vertical magnetic field component is color-coded (light/yellow pointing upward and dark/blue pointing downward). Note that the field lines form a left-handed spiral over the scale of the domain, as expected for turbulence with positive helicity at small scales. The x-axis points to the right while the y-axis points upward. Adapted from Warnecke & Brandenburg (2010).