a) Positions of the young massive stars from which we cast Lyα photons that make up the galactic contribution. b) SB map of the extragalactic emission region. c) SB map of the blob after transfer, with both galactic and extragalactic contribution to Lyα emission. d) Mock observation of the halo with a seeing of 1″. The dashes show polarization, and the contours mark 1.4 × 10^-18 erg s^-1 cm^-2 arcsec^-2 and 10^-19 erg s^-1 cm^-2 arcsec^-2.