Dirty and restored maps of the sky showing the impact of incoherent post-processing superstation beamforming. These images show apparent flux, not intrinsic flux. Colour scales and pixel coordinates are matched in all images, and all units are Jy bm⁻¹. 3C295 is the very prominent, very bright source that dominates the field. While the PSF changes as a result (which is an expected and normal outcome), signal is also lost: this can be seen most clearly in the two north-eastern sources in panels a and b (dirty and restored maps made without the superstation respectively) that vanish from panels c and d (dirty and restored maps made with the superstation, respectively).