Rendering of the 3D MHD pulsar wind nebulae and their complex environments. The orange surfaces trace constant density regions of the stellar wind bubble, the red surfaces trace the red supergiant wind, the magenta surface traces the Wolf-Rayet wind, the cyan surface traces the supernova ejecta and the white tubes trace the magnetic field in the pulsar wind. The 3D figures are clipped with two planes, permitting a visualisation of the internal structure of the plerionic supernova remnant. The displayed models differ only by the angle between the ISM magnetic field lines that shape the main-sequence stellar wind bubble (orange) and the axis of rotation of the pulsar (fixed in all models as being in the vertical direction). The angle is of θ_mag = 0° (a), θ_mag = 30° (b), θ_mag = 45° (c), and θ_mag = 90° (d), respectively.