Rendering of the 3D MHD pulsar wind nebula models, considered without (a,c) and with (b,d) their complex environments. The orange surfaces trace the constant density regions of the stellar wind bubble. The remaining color coding is as follows: red traces the supergiant wind, blue traces the WR wind, cyan traces the supernova ejecta, and white tubes trace the magnetic field lines in the pulsar wind. The 3D figures are cut with two planes, allowing for a visualization of the internal structure of the plerionic supernova remnants.