3D volume rendering of plasma density in the current layer around the BH event horizon (central black sphere). Flux ropes are stretched in the azimuthal direction and break up into visible overdense plasma filaments flowing outward along the cone-shaped current layer. The black vertical line is the spin axis of the black hole while the two other coordinate axis in gray are in the equatorial plane. In the right panel (zoomed in), the red rings above and under the equatorial plane locate the Y-ring. An animated version is available online.