Filament deflection and 3D cone projections. Left panel: LOS projections of the DIRECD cone (blue mesh) to the STEREO-A view to both 195 Å EUVI (11:50 UT) and COR2 (13:23 UT) images. Red dots show the LOS projections of the filament’s 3D coordinates, and the orange line represents LOS projections of a linear fit to the filament points used as the cone’s central axis (CME pre-deflection direction). The green line indicates the CME post-deflection direction determined from the 3D reconstructions of the filament’s height at 11:45 UT (see Fig. 4). Right panel: LOS projections (blue mesh) of the DIRECD cone to the 304 Å Solar Orbiter view at 11:45 UT, after the filament deflection. The green line shows the CME post-deflection direction. The cone closely matches the filament shape.