Disneyland uses an alignment grid projected on the Main Street USA facades to make sure the projectors hidden in second story windows are perfectly aligned with the buildings where the animated projections appear during the show.
Larger projectors “hidden in plain sight” in the It’s a Small World plaza rise up from green boxes and stone enclosures to project imagery on the water ride facade that serves as a 200-foot-long screen during “Wondrous Journeys.” The tour continues on the Fantasyland rooftops on either side of Sleeping Beauty Castle where pyrotechnic technicians test an Isopar system that shoots 50-foot flames into the air during “Wondrous Journeys.” Nightly inspections check for debris in the Isopar firing heads and to ensure that the flamethrowing system is pressurized with no leaks.