In season 1 of Westworld we saw the Maze in some places.
The Maze shows up on the inside of Kissy's scalp when being scalped by Man in Black, after the man in black traumatizes Maeve, she runs out and falls with a maze somehow magically appearing around her , its on a box in a train in that scene with Dolores, and there was one scene with a host carving it on a table.
As in Season 2 Episode 1, we again see the Maze in some other Host's head. So is there a Maze drawn inside every Host's head? Or is is just a chosen few ?
Or as this reddit discussion says, it appear only when the hosts feel fear and suffer??.