OSIRIS NAC pre- and post-perihelion images used in this work (see Table 1 for image ID). (A) OSIRIS NAC image taken on 12 December 2014. The spatial scale of the image is 0.36 m px⁻¹. This area is located in the Hatmehit region. (B) OSIRIS NAC image taken on 23 July 2016 with a spatial scale of 0.19 m px⁻¹. This area is located in the Hatmehit region. (C) OSIRIS NAC image taken on 10 December 2014 with a spatial scale of 0.38 m px⁻¹. This area is located in the Hapi region. (D) OSIRIS NAC image taken on 20 July 2016. The spatial scale of the image is 0.17 m px⁻¹. This area is located in the Hapi region. (E) OSIRIS NAC image taken on 29 September 2014. The spatial scale of the image is 0.35 m px⁻¹. This area is located in the Imhotep region. (F) OSIRIS NAC image taken on 23 July 2016 with a spatial scale of 0.28 m px⁻¹. This area is located in the Imhotep region. In panels E and F we highlight a detail of the Imhotep case study area.