Accuracy of the inversion code for inferring complex atmospheres. The top row displays the correlation between the input and the inferred atmospheric parameters presented in Fig. 3. The bottom row shows the average value of the difference between the input and the inferred atmosphere over the entire inverted FOV. Error bars designate the standard deviation of the difference. From left to right, columns correspond to the temperature, LOS velocity, and LOS magnetic field. Each panel displays the variation in the correlation and differences with optical depth.