Left: 3D Brackett γ local line profile representation for a star with at the poles and at the equator from Kurucz/Synspec model. The polar line profiles (in the board) have less amplitude than the equatorial one in the middle. Right: 3 panels of 1D cuts of the same 3D figure at different latitudes; at the poles (red line), at the equator (blue) and the average (in green).