Complex sentence: He was commonly depicted as pharaoh with a complexion of either green (the color of rebirth) or black (alluding to the fertility of the Nile floodplain) in mummiform (wearing the trappings of mummification from chest downward).
Split into simpler sentences: He was commonly depicted as pharaoh with a complexion of either green (the color of rebirth) or black. Depicted in mummiform (wearing the trappings of mummification from chest downward).