Examples of boulders displaying bright patches on their surface in four different regions of the comet: a) boundary between Ma’at and Maftet; b) Atum; c) boundary between Serqet and Anuket; d) Hatmehit. These boulders are about 10 m long. The bright spots are typically one to two meters in diameter. The bright stripes in images a) and b) are also about one to two meters wide. a) Ma’at-Maftet. Subset of OSIRIS NAC image: NAC_2014-10-05T23.54.02.593Z_ID30_1397549500_F22.IMG; b) Atum. Subset of OSIRIS NAC image: NAC_2014-11-03T12.17.55.805Z_ID30_1397549000_F22.IMG; c) Serqet-Anuket. Subset of OSIRIS NAC image: NAC_2014-09-29T07.12.53.553Z_ID30_ 1397549400_F22.IMG; d) Hatmehit. Subset of OSIRIS NAC image: NAC_2014-09-30T20.44.47.569Z_ID30_1397549300_F22.IMG.