Relative orientation between the magnetic field and the density structures (blue-red) overlaid on the surface brightness map (shades of gray) in Region 1. The relative orientation goes from fully parallel (blue, 0°) to fully perpendicular (red, 90°). The top row shows the results from the analysis performed on the same pixel subsample for the RHT-H case (left), the GRAD-L case (middle) and the GRAD-H case (right). In the bottom row, each method is performed on its own native selection. Because the subsample chosen for the same-pixel analysis is the one from RHT (RHT-H case), the two panels on the left are the same.