2013, new projection mapping effects were added for the Hall of Promise. The Chamber of Destiny’s doors was also updated with projection mapping effects in 2015. , the machinery used to rotate the room has been deactivated and is no longer used. Instead, the transport always enters the second door in the center, and the effect of entering a specific room is accomplished using projectors hidden on either side of the chamber, which shuffle through various video effects that are superimposed onto all three doors to create the illusion that the transport is entering a specific room. If the transport gets the Fountain of Eternal Youth, Mara says, "You have chosen wisely. This path leads to timeless youth and beauty." The rusted, corroded doors of that chamber are rinsed clean by a sheet of purifying water pouring from the relief above, revealing their pristine, metallic nature as they swing open. In the Hall of Promise, where the painted murals on the walls show the timeless beauty of Mara's chosen ones as everyone around them ages, the walls reflecting with the light on the water. At the far end of the hall, a massive stone face of Mara, with flowering vines scaling the walls around it. The room appears illuminated with shimmering aqua blue light. Front-lit scrims along the walls are painted to depict true believers drinking mystic water, discarding their withered skin and emerging young and beautiful. If the transport gets the Chamber of Earthly Riches, Mara says "You seek the treasure of Mara, glittering gold. It is yours." The vault doors begin to unlock as gold coins appear to rain down from the relief above as the doors open. Inside the Hall of Promise, piles of gold, bronze statues, and priceless carvings fill vestibules on each side with a massive gold face of Mara at the far end of the hall. The room is illuminated with shimmering golden light behind the backlit scrims where images of gold and other treasures are visible, rendering the Fountain of Eternal Youth scrim paintings transparent. If the transport gets the Observatory of the Future, Mara says, "You seek the future. I will lift the curtain of time. It is your destiny." The doors are sealed by an iced web that clouds its carved reliefs. But upon Mara's announcement, the all-seeing eyes above glow, whisking away the icy wall as shooting stars illuminate the