Edge-on images of formamide (top row), methanol (middle), and methyl cyanide (bottom row) at the line emission peak in the low-mass envelope-only, “E-only”, and envelope-plus-disk, “E+D”, fiducial models. Dust was not included in these runs to avoid additional emission from dust (in all other runs, dust is included unless specified). Here the lines are NH₂CHO 14_3,11 −13_3,10 (ν = 299.2552 GHz, E_up = 134.1 K); CH₃OH 10_1,10,2−9_0,91 (ν = 326.9612 GHz, E_up = 133.1 K), run with ¹⁸O abundance; and CH₃CN 12_3,0 − 11_−3,0 (ν = 220.7089 GHz and E_up = 133.2 K), run with ¹³C abundance. The emission from formamide is less extended than that from methanol and methyl cyanide.