A big part of the $170 million sci-fi film is the extensive make-up process actors underwent ... it took roughly 2 to 3 hours daily to prep Zoe Saldana for her role as a deadly, green assassin ...

Zoe Saldaña ... but that green makeup? I wouldn't be upset if it didn't happen again," Saldaña told Variety. "I miss Gamora, but I don't miss 3:30 a.m. calls and five-hour makeup sessions ...