There are more pictures in the hall before Emma gets caught just before she enters the room where MM is tied up.
As for the one picture in the room with MM, it looks like a hand-drawn stick-figure color drawing that a child would have done, as far as I can tell. Unfortunately, I don’t know how to screen-cap either or I’d pull these pictures for you myself. ( I’m guessing you’re referring to the two – on either side of MM though. )
Alas, it seems both you & I are woefully inept when it comes to screen-captures.
Hm?