Color-composite image of the filamentary cloud L1157 made using Herschel 250 μm (red), WISE 12 μm (green), and Spitzer 8 μm emission (blue). A filament structure in yellow based on the dust column density (N(H₂)) distributionextracted using the Filfinder algorithm is also shown. The white segment shows the orientation of the outflow, and magenta and cyan segments represent the orientation of inner (traced for submm polarization emission measurements) and outer magnetic fields (traced for the optical polarization measurements of background stars), respectively.