Dust polarization angles measured in the CMZ as a function of 240 μm intensity. Top panel: polarization angle distributions plotted separately for intervals of increasing 240 μm intensity in the PILOT I map. The characteristic 240 μm brightness is indicated using colour, and ranges from 10^3.5 (red) to 10^5.1 MJy sr⁻¹ (blue). Bottom panel: mean and mode of the polarization angle distributions directly as a function of the 240 μm intensity.