The tour reprised the same multi-faceted stage setup from the Innocence + Experience Tour. Several technological enhancements were made over the original version of the set. PRG's Pure10 video panels featured a
pixel pitch of , which alone nearly tripled the display resolution of the "barricage" screen and thus enabled an AR event to be triggered. Ordinarily, this would have decreased the transparency of the display, since the
printed circuit boards (PCBs) attached to the LED panels were moved closer together. PRG solved this problem by slicing the PCBs into strips, rotating them 90 degrees, and mounting the LEDs on the sides. With the weight reduction of the "barricage", the interior walkway could move independently from the two video displays, compared to the 2015 version; which overlaid
computer generated imagery over footage captured by a phone's camera. Long-time U2 stage designer
Willie Williams collaborated with
Nexus Studios on the AR technology and with Treatment Studio to design the 3D
avatar of Bono. During the pre-show music, the AR experience saw "the stage recast as an enormous iceberg" that began to melt and flood the audience; the imagery was a precursor to the tsunami wave that displayed on the video screens during the final song of the show's first act, "
Until the End of the World". For the opening song, "Love Is All We Have Left", the app displayed an avatar of Bono hovering above the audience, accompanying the real-life Bono as he performed the song. AR was further used during the concerts through a camera
filter that helped Bono revive his old stage character "
MacPhisto", a representation of the devil that he previously portrayed on the
Zoo TV Tour in 1993. The filter, called the "MacPhisto Effect", was created by Marc Wakefield on the
Facebook for Developers AR Studio platform, in collaboration with the tour architect Ric Lipson and his design studio Treatment Ltd. Wakefield drew the attention of U2's creative team after creating a popular "
creepy clown" filter and receiving an invitation to Facebook's annual developers conference. He was tasked with taking the original design of MacPhisto from 1993 and imagining how 25 years of hard living would change his appearance. After several iterations and feedback provided by Bono, the resulting likeness featured sharper, more misshapen teeth, cracked and peeling skin, a beaten up top hat, a longer nose and chin, and a large blemish on his cheek. During testing, the filter occasionally disappeared, revealing Bono's face underneath, but rather than try to fix it, the creative team relented when they realised this gave the impression that "MacPhisto was fighting for control over Bono". The filter was made publicly available on the Facebook mobile app in July 2018. Just as with the original tour, the omnidirectional nature of the production and the possibility of the band members being spread out during performances presented a challenge for the
sound design. Ultimately, the sound engineers hung the sound system from the venue ceilings in an oval ring, placing 12
arrays of
Clair Global Cohesion CO-12
loudspeakers around the perimeter of the venue floor, each alternating between left and right channels for full
stereo sound. Additionally, eight arrays of Clair Cohesion CP-218
subwoofers, each comprising three
speaker cabinets, were hung from the ring. Each cabinet was no more than from the audience. For downfill and centerfill sound to the general admission attendees, 32 Clair Cohesion CO-10 cabinets were suspended above the B-stage, walkway, and front of the main stage, while 18 Cohesion CO-8 cabinets were built into the walkway and stages. The levels of the speakers were
time-aligned for optimal quality. In total, more than 200 loudspeakers were used. With the sound system designed to provide omnipresent audio, the
front of house mixing station could be positioned nearly anywhere in the venue as long as it was equidistant between CO-12 arrays. During the tour, the station was usually positioned within the audience seating, from which sound engineer Joe O'Herlihy operated a
DiGiCo SD7
digital mixing console, one of eight used by the production staff. The others were operated underneath the main stage; Alastair McMillan operated a mixing station for Bono, CJ Eriksson for Clayton and drummer
Larry Mullen Jr., and Richard Rainey for the Edge. The crew, consisting of 90 traveling members and 120 local labourers, could build the stage in about ten hours while disassembling it in four. In total, the equipment hung from the venue ceilings weighed . The show traveled continentally in 27 trucks, and overseas required 37
maritime transport containers or four
Boeing 747 freight airplanes to transport. ==Planning, itinerary, and ticketing==