Rez Infinite is a port of Rez for PlayStation 4, PlayStation VR and Microsoft Windows. It includes support for 1080p resolutions and 3D audio sound. In addition, Rez Infinite features a new level called "Area X" in which the player is offered 360 degrees of visual freedom and is no longer confined to a rail but can travel in any direction.:58 Area X was developed using the Unreal Engine, with visual design supplied by Takashi Ishihara at the request of Mizuguchi and designer Osamu Kodera. Enemy AI within Area X was also improved and Mizuguchi composed a new poem on the theme of birth to act as a coda to Yokota's poem in the game's Area 5.