Flux difference in percentage with varying the number of points describing the ellipse for different bins used to oversample each pixel with respect to the reference model flux. The differences are ≤1.5% using more than 200 points to describe each ellipse and with at least a bin value per side of 15 (green and blue lines). When using no bins (black line) the percentage is remarkably high and independent of the number of points describing the ellipse (using at least 200 points). In fact it implies integrating the entire pixel values for all the pixels with which the ellipse points is described.