It shows the single bed in which Maddie was sleeping before she vanished.
The McCanns, both 39, left Maddie and twins Amelie and Sean, two, asleep when they went for dinner at a nearby tapas restaurant on May 3.
Police still believe the apartment could hold the key to the case.
In a recent reconstruction, Portugal’s second most senior cop, Paulo Rebelo, played the role of an abductor – passing a bundle the size of Maddie, four, through a window.