Projection of the synthetic photometry and the real J-PAS photometry in the 2D parameter space obtained by UMAP dimensionality reduction algorithm. Black and gray data show the J-PAS APER_COR_3_0 and AUTO fluxes, respectively, while each panel shows the synthetic photometry for the three SSP libraries used in the training of the NN (E-MILES in orange, CB19 in green, and XSL in blue). While a single library does not fully cover the parameter space observed in real J-PAS data, the coverage is notably improved when the three libraries are combined together.