Editing Gantz (section)

==Production==
Hiroya Oku first thought of ''Gantz''{{'}}s story when he was in high school. He was inspired by the ''[[jidaigeki]]'' program Hissatsu, and the [[Robert Sheckley]] novel [[Immortality, Inc.|''Time Killer'']]. However, he did not decide to make ''Gantz'' until after writing the manga ''Zero One''; ''Zero One'' had a similar setting, but Oku ended the series, noting it was not very entertaining and that it was too expensive to develop.<ref name= "manual">{{cite book|last = Oku|first = Hiroya|title=Gantz Manual|year=2004|publisher=Shueisha|pages= 227–47|isbn=4-08-876735-7}}</ref>

When creating the chapters for the manga, Oku starts with a thumbnail of the pages. He then creates 3D models of the characters and backgrounds on his computer. Once done, Oku prints the characters and backgrounds he made in 3D, adds tone and color to the pages, and finishes with sound effects and dialogue.<ref>{{cite book|last = Oku|first = Hiroya|title=Gantz|volume = 1|year=2008|publisher=Dark Horse Comics|pages=216–19|isbn=978-1-59307-949-9}}</ref> He had already used this style in ''Zero One'', but for that title, there was little work in hand drawing; Oku decided to add more hand drawing to give ''Gantz'' a more realistic tone as well as reduce the budget. However, he still notes that such a method is time-consuming and that he has to work quickly in order to finish the chapters on time.<ref name= "manual"/>

Oku tries to incorporate realism into ''Gantz'' and adds that some of the events occurring in the story are based on his opinions regarding the world. During violent or erotic scenes, Oku makes sure to not make them very long to avoid reducing the series' realism. However, he has mentioned that he does not autocensor and that all the drawings he has ever illustrated have been published in the manga.<ref>{{cite web|url= http://www.edicionesglenat.es/asp/reportaje.asp?pid=541|date= June 17, 2009|title=Hiroya vs. Migoya|last = Migoya|first = Hernan|language= es|publisher=[[Glénat (publisher)|Glénat]]|access-date=August 5, 2009|archive-url= https://web.archive.org/web/20100621224537/http://edicionesglenat.es/noticia.aspx?pId=541|archive-date=21 June 2010|url-status=dead}}</ref> Some [[plot twist]]s are meant to go against common events that happen in several manga such as the deaths of the major characters like Kei Kishimoto and Masaru Kato. Before the series started serialization, Oku told his assistants that with Kurono's exception, all the major characters from the series would die.<ref name="manual"/>