Estimations of stellar horizon along the discretisation seams. The figure on the left shows horizon estimations for photometric phase 0 and inclinations 80°, 60°, 30°, and 0°. The figure on the right focusses on the horizontal seam with horizon estimations for inclination 90° and photometric phases 0, 12, 25, and 45. The estimation of the horizon corresponding to the inclination 0° and photometric phase 0.25 shows symmetrical residuals due to the seam located directly on the horizon.