Simulated density structures from the WindPredict-AW fully fledged 3D MHD model. Top two panels: front and top views of the 3D density structures propagating within the core of the (true) streamer belt (identified with a Br = 0 isosurface). Coordinates in the Carrington frame are also given, for the longitudes (lighter colours, in degrees) and radial distances (darker colours, in solar radii). Bottom panel: synoptic (Carrington) map at r = 16.5 R_⊙ with PSP orbit plotted in cyan. To identify the true streamer belt from pseudo-streamer structures, a Br = 0 contour is plotted as a red dashed line. In both panels the FOV of WISPR-I and WISPR-O are shown in white and grey, respectively. In both panels the logarithmic colour scale represents the flux of plasma density scaled by its value at the inner boundary (r = 1.0002 R_⊙). The coloured arrows point to flux rope structures (see main text for discussion). An animated version of this figure is available online.