Matteo Bittanti is an artist and writer who works with and write about games and art. His blog gamescenes.org is a great resource for the wider explorations of the gameart world.
Many in-game photography projects can be found under this category search: http://www.gamescenes.org/photography/
Selected projects found via gamescenes:
Coll.Eo, “FOLLOWING BIT” (2013)
Lim Laughton,“Los_santos.Obj” (2014)
Damien Hypolite, “Then And Now” (2014)
Casey Brooks, “You Only Live Forever” (2014)