Composite image of the outer corona, observed with the Metis coronagraph in polarized visible light, and of the medium and inner corona observed at the Mauna Loa Solar Observatory, with the inner magnetic boundary condition (B_r) of the PSI-MHD model at 1 R_⊙ (left panel). Field lines traced near the plane-of-sky from the PSI-MHD simulation are overlaid over the composite image. The right panel shows the same field lines, but now with forward modeled SDO/AIA 193 Å and polarized brightness observables computed directly from the simulation.