Editing Holography

{{Era|Forerunner|Covenant|Human|UNSC|HCW|Post}}
{{Wikipedia|Holography}}
{{Center|''"'''Hologram'''" redirects here. For the Armor ability, see [[Type-27 hologram]].''}}
[[File:HaloWars-SOF-Holotable.jpg|thumb|300px|A holographic topographical map and the [[avatar]] of [[Artificial intelligence|AI]] [[Serina]] aboard a UNSC warship, the {{UNSCShip|Spirit of Fire}}.]]
'''Holography''' is a technological system that forms a visual representation of an object in three physical dimensions, as opposed to the planar image of traditional screens that simulate depth through a number of different visual effects. Holography is employed by the [[human]]s, the [[Covenant]] and the [[Forerunner]]s in a variety of functions - communications, battle and sensor displays, and as [[Type-27 Responsive Holographic Form Emulator|distractions]] and [[holo-drone|decoys]]. Devices used to project holograms are commonly referred to as [[holotank]]s.

==Applications==
===Human===
[[File:Errera int 1.jpg|thumb|An example of civilian application of holography in [[Club Errera]].]]
The UNSC uses holographic technology in a variety of ways. [[Artificial intelligence]] constructs, such as [[Cortana]], project holographic representations of themselves for personal communications with humans, with each AI taking a [[Avatar|unique appearance]] of their own choice. The UNSC also uses holograms for communications between individual humans. The commanding officer of one ship may "appear" on another to deliver a message when normally access between the two vessels is restricted. Many UNSC warships, [[military base|bases]] and other facilities are equipped with holographic tables, used to project topographical maps or other images for tactical purposes.

Holography is frequently used in human computer terminals, which, though not actually solid, respond accordingly to physical input without the need for a separate device such as a keyboard.<ref>'''Halo 4: Forward Unto Dawn'''</ref> Holography also has many [[civilian]] uses. For example, some nightclubs such as [[Club Errera]] make extensive use of holograms.<ref>'''[[Halo: Reach]]''', campaign level, ''[[New Alexandria]]''</ref> Humans also use holographic technology to display holographic "photographs", referred to as [[holo-still]]s. Holographic tape is used to display information on the sides of civilian vehicles.<ref>'''[[Halo: Contact Harvest]]''', "chapter 5", ''page 77''</ref>
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===Covenant===
[[File:Broadcast2.jpg|thumb|Covenant [[San'Shyuum|Prophets]] used holographic projectors to preach to their troops.]]
The [[Covenant]]'s holographic technology is also based primarily on that of the Forerunners, and though superior to UNSC technology it still pales in comparison. The Covenant use holograms for visual displays of space and ground combat, allowing a better general view of the action and better coordination. Holograms are also used as decoys, through devices known as [[holo-drone]]s, able to generate their own shields and weapons to give the illusion of reality. One of these was used by the [[Sesa 'Refumee's heretic faction|heretic]] leader [[Sesa 'Refumee]] before his death at the hands of the [[Thel 'Vadam|Arbiter]].<ref>'''[[Halo 2]]''', campaign level ''[[The Heretic]]</ref> The Covenant also utilize less sophisticated [[armor abilities#Hologram|holographic decoys]] in the field, a technology which has also been replicated by the UNSC.<ref>'''Halo: Reach'''</ref>

As shown by the ability of holo-drones to use weaponry, certain Covenant holograms are somehow capable of physically interacting with their environment. The Prophets, in particular, make extensive use of holography in their governance of the Covenant. Religious sermons, such as those by the [[Prophet of Truth]]<ref>'''[[Halo 3]]''', campaign levels ''[[Tsavo Highway]], [[The Storm]], [[The Ark (level)|The Ark]] and [[The Covenant (level)|The Covenant]]''</ref> and [[Prophet of Regret]],<ref>'''[[Halo 2]]''', campaign levels ''[[Delta Halo]] and [[Regret (Halo 2 level)|Regret]]''</ref> are transmitted holographically via [[Portable holo-pedestal|portable projectors]], allowing the Prophets to preach from the relative safety of their point of transmission while protected by [[Honor Guard|armed guards]].
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===Forerunner===
[[File:Ark.JPG|thumb|A Forerunner holographic representation of the Ark.]]
Consistent with their high level of technological advancement, the long-vanished Forerunners were true masters of holography. Their projections were accurate far beyond UNSC or even Covenant capabilities, able to appear indistinguishable from physical objects and simulate solidity via the use of sophisticated [[hard light]] technology. 

On the various facilities of the [[Halo Array]] as well as other Forerunner installations, holograms are used to convey information on the installation, from general visual representations to more specific details. Virtually all Forerunner control panels and terminals are based upon solid, hard light holography. 

The Forerunners also used their mastery of holography to produce realistic decoration to interior spaces; for example, the [[Menachite portal complex|Forerunner ruins]] underneath [[CASTLE Base]], despite eons of neglect, were still capable of projecting myriad environments from hundreds of worlds.
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==Trivia==
{{Linkbox|gallery=yes|gallerypage=Images of hologram technology}}
What is generally, and incorrectly, referred to as a "hologram" in most science fiction, including the ''Halo'' series, is actually a [[Wikipedia:Volumetric display|volumetric display]]. True [[Wikipedia:Holography|holograms]] are not three-dimensional images. More specifically, ''Halo'' "holograms" seem to be of the [[Wikipedia:Volumetric display#Static volume|static volume]] type, creating an actual three-dimensional image rather than creating the illusion of it.<ref>[[Wikipedia:Holography|'''Wikipedia''''s article on Holography]]</ref>
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==Gallery==
<gallery>
File:TSC01.png|A holographic map of the [[Silent Cartographer]] in ''[[Halo: Combat Evolved]]''.
File:Control Room2.jpg|A Forerunner holographic representation of Installation 04.
File:H2-HereticLeaderDecoy.png|A photorealistic hologram of [[Sesa 'Refumee]] produced by a [[holo-drone]] in ''[[Halo 2]]''.
File:H3_TheStorm_TruthHologram.png|A hologram of the High Prophet of Truth.
File:H3ODST PreparetoDropCinematic.jpg|A holographic representation of New Mombasa in ''[[Halo 3: ODST]]''.
File:Holography_civilian_welcome.jpg|A holographic sign showing the word "welcome" in different languages on the [[Quito Space Tether]]'s orbital station.
File:H3_Epitaph_Hologram.png|An enigmatic Forerunner hologram on [[Epitaph]].
File:Sinoviet frigate hologram.jpg|A hologram of a [[UNSC frigate]] in the lobby of the [[Sinoviet Center]] in [[New Alexandria (location)|New Alexandria]] in ''[[Halo: Reach]]''.
File:FoR - HathcockHolo.png|Hologram of the UNSC ''Pillar of Autumn'' in ''[[Halo: Fall of Reach]]''.
File:Control Room.jpg|Holograms in Installation 04's control room in ''[[Halo: Combat Evolved Anniversary]]''.
File:Commissioning-3.jpg|A hologram of the UNSC ''Infinity'' in ''[[The Commissioning]]''.
File:CAMS - lecture.jpg|A holographic table in the [[Corbulo Academy of Military Science]] in ''[[Halo 4: Forward Unto Dawn]]''.
File:Requiem holo map.jpg|A holographic map of [[Requiem]] in ''[[Halo 4]]''.
File:HoloSOF.png|Hologram of the UNSC ''Spirit of Fire'' in ''[[Halo: Escalation]]''.
File:H2A - Halo Array hologram.jpg|Holograms of the Halo Array in ''[[Halo 2: Anniversary]]''
File:HSS-MustacheMan.png|Hologram of Installation 03 in ''[[Halo: Spartan Strike]]''.
File:TFoR-as-Deja.jpg|The "dumb" [[AI]] [[Déjà]] using holograms to teach the [[SPARTAN-II]] candidates in ''[[Halo: The Fall of Reach - The Animated Series]]''.
File:H5G-Argent Moon hologram.png|Hologram of the [[ONI]] research vessel ''[[Argent Moon]]'' in ''[[Halo 5: Guardians]]''.
File:HW2-Anders&CutteraboveArk.png|Hologram of Installation 00 aboard the UNSC ''Spirit of Fire'' in ''[[Halo Wars 2]]''.
File:HINF BanishedHoloUIConcept.jpg|Concept art of various symbols and graphics used in [[Banished]] holographic displays in ''[[Halo Infinite]]''.
File:HINF GbraakonConsoleConcept.jpg|Concept art of a Banished holographic display on the ''[[Ghost of Gbraakon]]''.
</gallery>

==List of appearances==
*''[[Halo: The Fall of Reach]]'' {{1st}}
*''[[Halo: Combat Evolved]]'' {{C|First pictured}}
*''[[Halo 2]]''
*''[[Halo: Uprising]]''
*''[[Halo 3]]''
*''[[Halo: Contact Harvest]]''
*''[[Halo Wars]]''
*''[[Halo 3: ODST]]''
*''[[Halo: Reach]]''
*''[[Halo: Fall of Reach]]''
*''[[Halo: Combat Evolved Anniversary]]''
*''[[Halo 4: Forward Unto Dawn]]''
*''[[Halo 4]]''
*''[[Halo: Spartan Assault]]''
*''[[Halo: Initiation]]''
*''[[Halo: Escalation]]''
*''[[Halo 2: Anniversary]]''
*''[[Halo: Spartan Strike]]''
*''[[Halo 5: Guardians]]''
*''[[Halo: The Fall of Reach - The Animated Series]]''
*''[[Halo Mythos]]''
*''[[Halo Wars 2]]''
*''[[Halo: Envoy]]''
*''[[Halo: Retribution]]''
*''[[Halo: Rise of Atriox]]''
*''[[Halo: Bad Blood]]''
*''[[Halo: Fireteam Raven]]''
*''[[Halo: Silent Storm]]''
*''[[Halo: Battle Born]]''
*''[[Halo: Renegades]]''
*''[[Halo: Outpost Discovery]]''
*''[[Halo: Oblivion]]''
*''[[Halo: Meridian Divide]]''
*''[[Halo: Shadows of Reach]]''
**''[[Sacrifice]]'' {{Mo}}
*''[[Halo: Point of Light]]''
*''[[Halo Infinite]]''

==Sources==
{{Ref/Sources}}

[[Category:Hologram technology| ]]