Straight loop simulation mapped to a semi-circular grid. Only one half of the numerical domain is shown. The emissivity, ρ², has been passed through the SDO/AIA 171 Å temperature response function to show the intensity in that bandpass. There is no resulting intensity from the chromosphere or the transition region due to the 171 Å temperature response. Solid blue lines show LOS rays taken from the footpoint from s = 0 to 30 Mm height.