Upper panel: angular profiles of the isotropic-equivalent energy E_iso for all models at ﹩{R}_{{\rm{c}},{\rm{\max }}}\approx 1{0}^{13}\,{\rm{cm}}﹩. The blue, red, green, purple, pink, and brown curves correspond to models Lc, Lsd, Lld, Llm, Lhm, and Lp, respectively. The black dashed line shows the angular profile used in our afterglow calculations. Lower panel: angular profiles of the photospheric four-velocity, u_ph, for the same models.