Non-photorealstic look development work on a large scanned rock. Some albedo textures have been filtered through Prisma and some have been hand-painted in Photoshop based on the original scan. The normal map used here is also uses a hand-painted effect to break up the real world detail.
More info about this process here: https://petemcnally.com/2016/08/09/lookdev-experiments-ii/
Marmoset Toolbag version