Spira is the first Final Fantasy world to feature consistent, all-encompassing spiritual and mythological influences within the planet's civilizations and their inhabitants' daily lives.

[2][3] Yusuke Naora, the art director, noted that during the concept stage many people on the project were interested in Asian themes including Nojima and Kitase.

[4] Nomura said that Spira deviates from the worlds of past Final Fantasy games most notably in the level of detail incorporated, something he has expressed to have made a conscious effort to maintain during the design process.

[3] Fumi Nakashima, the sub-character chief designer, concentrated on giving characters from different regions and cultures distinct styles of clothing.

Nakashima wanted the machine-oriented society of the Al Bhed to stand out and had them wear masks and goggles to give them a strange and eccentric appearance.

[3] Koji Sugimoto, main programmer for characters, said that the complexities of the PlayStation 2 hardware made mastering it difficult, but more rewarding because the details on Yuna's sleeves to the depiction of shine and shadow could be rendered more realistically.

[3] Final Fantasy X was the first game that allowed for 3-D model rendering of backgrounds that increased the presentation, including small details like grass blowing in the wind and cloud movement.

The dark religious theme of the first game was concluded and the cultural changes were explored as the people of Spira focus on fashion that "reflects their state of mind".

[9] Many views could not simply be reframed to 16:9 because that would reveal characters waiting for their cues off-screen, so the remastering team performed a lot of redrawing and additions to the visuals.

The Moonflow is a large river running through the heart of Spira, featuring shoopuf rides, ancient ruins, and a high density of pyreflies.

Further north are the Calm Lands, a series of plains that have been the site of numerous battles in Spira's history; the Cavern of the Stolen Fayth, an equally historical area; and Mt.

Lastly, the sacred city of Zanarkand is on the northern tip of the Spiran mainland, reduced to ruins by Sin one thousand years before the events of FFX.

Several new enterprises have been started, including a new pastime in Luca called Sphere Break; a group of entertainers at the Moonflow; a tourist service at the Zanarkand Ruins; and machina transportation in favor of Chocobos on the Mi'ihen Highroad.

The Al Bhed is a unique ethnic group which plays an important role in the storyline and world of the games with distinctive green eyes with spiral-shaped pupils.

[12] Spira's history centers around an ancient war a thousand years prior to the start of the game between Bevelle and Zanarkand, the latter's ruler deeming his city's eventual demise and reserve to preserve its memory.

[14][15] Through the machinations of Yevon's daughter Yunalesca, Bevelle established a religious faith built on atonement and sacrifice to conceal the spiral of death that runs throughout Spira's history.

A thousand years following the establishment of the Yevon Order, Spira became a rustic land, almost completely devoid of large cities and higher civilization.

As a result of the events in Final Fantasy X, in X-2 the teachings of Yevon were deemed invalid after the order's secrets were exposed while the Al Bhed accepted by the Spirans with association with machina no longer sacrilegious.

Magic, spiritual energy, and the power of memories are heavily intertwined, and their effects manifest in a number of situations, including sporting events, religious practices, technology, and even in some of the native wildlife of the planet.

The depiction of Sin as an "existence that agonizes the world" and as a "disaster with form" plays an important role in Spira's everyday life throughout the game.

In Spira, when a person dies suddenly and unexpectedly, his or her life force, manifested as pyreflies, must be released from the body and sent to the Farplane, the final resting place of departed souls.

[12] Pyreflies are also associated with many commonplace technological innovations including sphere-shaped recording devices and large, suspended spherical conglomerations of congealed water (called "sphere pools") that serve as the playing field for blitzball games.

Shinra of the Gullwings suggests that the life energy flowing through Spira on the Farplane could possibly be harnessed for the purpose of supplying electricity to a city.

Its fictional history started as a song of defiance turned scripture and has numerous variations that is played throughout the game throughout Yuna's journey, primarily as the music of the temples.

[27] Though the Hymn's words apparently have no discernible meaning within the context of Spira, the lyricist and scenario writer, Kazushige Nojima, composed a small puzzle with the lyrics, using Japanese syllables.

"prayer child") are humans who willingly give up their lives to have their souls sealed in statues and commune with summoners with whom they have established a mental link.

Ten aeons are identified in Final Fantasy X: Valefor, Ifrit, Shiva, Ixion, Bahamut, Anima, Yojimbo and the three Magus Sisters.

The group was founded by Lord Mi'ihen, who made a journey to Bevelle 800 years ago to calm the maesters' fears that he was assembling an army to conquer them.

[34] Washburn uses FFX and the analysis of its narrative to make the case for academic study of the medium and counter the critical views held by detractors like Espen Aarseth, summarizing that "the ability to complete the game requires mastering not only the instrumental controls needed to acquire and perfect game skills but also the narrative itself, the cultural knowledge of Spira that facilitates the acquisition of skills and abilities".

[36] In the Marie Curie Euroconference on the Challenges of Multidimensional Translation, Minako O'Hagan expanded on the localization issue including the extreme rewrite of Final Fantasy X-2's theme song 1000 words and the International Edition, saying that in-game dialogues were produced fresh to match the dubbed American version, instead of using the original Japanese script.