Reflections of bright stars outside the CCD. Left: Image r430532, CCD#1, Hα filter. The reflection in the centre is up to 25% of the background. The one near the top reaches more than 300% of the background counts. Right: Image r764550, CCD#3, i filter. The large and small reflections have 6% and 21% more counts than the background, respectively. The visible fringing is at about 1.5% of background. The HAGRID superpixel map is shown to enhance low level detail. Black areas correspond to rejected superpixels due to high levels of masking. The colour scale goes from red (low values) to blue (high values).