Distribution of the difference between the zero points estimated with Gaia synthetic photometry (colored histograms) and the stellar locus regression technique (gray histograms) with respect to the zero points estimated with the SCR methodology. The gray and colored lines are the best Gaussian fits to the former and latest case, respectively. The accuracy in the calibration is labeled in the panels. We present, from top to bottom and from left to right, the filters u, J0378, J0395, J0410, J0430, 𝑔, J0515, r, J0660, i, J0861, and z.