Profiles emerging from the disk illuminated from the inside. The disk has a radial optical thickness τ_r = 1000 and a vertical optical thickness τ_z = 10 (Model A_i). Top: non-rotating disk; middle: Keplerian rotation; bottom: solid body rotation. Note that the intensity profile for the highest inclination has been scaled by a factor of 0.5. See the text for the discussion of line profile shapes.