Inverted 3D dust distribution. Top: extinction density in the XY plane containing the Sun. The orientation is parallel to the Galactic Plane. The map is at the lowest resolution (correlation length of 50 pc). The Sun is at (0,0). Units are in parsecs. The colour scale is the same for all maps and is shown in Fig. 12. The thick dashed-dot black line shows the distance beyond which cells may be devoid of targets (see text for caveats at large distance). Iso-extinction density contours are drawn for 1 × 10⁻⁵ (red), 5 × 10⁻⁵ (dashed pink), 1 × 10⁻⁴ (dashed light orange), 2 × 10⁻⁴ (dashed orange), 5 × 10⁻⁴ (red), 1 × 10⁻³ (orange), 2 × 10⁻³ (brown), 5 × 10⁻³ (dark green), 1 × 10⁻² (dashed light green), 2 × 10⁻² (blue) mag pc⁻¹. A giant cavity devoid of dust lies between longitudes l ≃ 85° and l ≃ 145°. Middle: extinction density in the XZ (meridian) plane. The Galactic centre is to the right. Bottom: extinction density in the YZ (rotation) plane. The sense of rotation is to the top.