While the EXT processing is improved with respect to Q1, a few issues are still present in the DR1 EXT products, as discussed in section 6 of Euclid Data Release 1 (DR1). Colouring Euclid with external ground-based imaging data. This is especially the case with the Pan-STARRS imaging, where an incorrect handling of the flags by the SGS has led to areas with degraded photometry. A HEALPix information map allowing to track regions affected by this region is provided by the VMPZ-ID PF Euclid Data Release 1 (DR1). Euclid photometric masks.