Redshift evolution of the median angle of alignment (and ±1σ bootstrapped errors) between the major axis of galaxies/subhalos and the direction of the nearest filament segment, in the DM-only TNG50-Dark (top row) and the hydrodynamic TNG50 (middle and bottom rows) simulations. Dashed lines and square markers represent the alignment at 2r_DM (outer halos), while solid lines and circles represent alignment at 0.1r_DM (inner halo). The left, middle, and right columns subdivide subhalos/galaxies by 3D shape, line density of nearest filament segment, and mass, respectively. The dashed horizontal line represents no preferential shape alignment. DM shape–filament alignments are down to at least z ∼ 2 in TNG50 and z ∼ 0.5 in TNG50-Dark, but stellar shape–filament alignment disappears at z < 4 and tends toward misalignment at z ≤ 2. At the outer halo scale, prolate halos, massive halos, and halos near high-density filaments show the strongest shape alignments. The inner halo shapes are less aligned in the baryonic than in the DM-only simulation.