Breast physics explained

In video games, breast physics or jiggle physics are a feature that makes a female character's breasts bounce when she moves, sometimes in an exaggerated or unnatural manner.

History

The first video game in which breast physics were a notable feature was the fighting game Fatal Fury 2 (1992), which featured the fighter Mai Shiranui, who had noticeably jiggly breasts.^[1] Pronounced breast physics have since remained a staple feature of many fighting games, perhaps in part because these games contain fewer character models than other games and can therefore afford to animate their characters in more detail. The Dead or Alive series (1996–), in particular, has become identified with the "outlandish" physics of both its fighting moves and its female characters' breasts; its developer Team Ninja created the term "breast physics".^[2]

On occasion, this aspect of fighting games has caused particular attention, such as when the 2016 game Street Fighter V had the fighter Chun-Li's breasts move like large water balloons when she was chosen as the second player's character in the selection screen. Although this behavior was noticed by media even before the game's release, it remained present in the released version of the game.^[3] The game's publisher Capcom attributed it to a bug and later removed it by a patch.^[4]

In reaction to the prevalence of big, bouncy breasts in video games, games writer Jenn Frank initiated a "boob jam" in 2013.^[5] The purpose of the initiative was to create games that deal "with an aspect of female breasts other than the fact that they're sexy and fun to look at".^[6]

Technology

Breast physics is an application of soft-body dynamics, the field of computer graphics that focuses on physical simulations of the motion and properties of deformable objects. In a game with 3D graphics, character models are composed of a skeleton of "bones" connected with joints and covered by a "skin" of textured polygons. These virtual bones do not necessarily correspond to the bones in real humans, but are required to make anything move. To make breasts or other body parts move, video game animators make the bones' joints move according to the physical rules of the game's engine.

To effect breast movement in most 3D games, the breast's bones are equipped with "springs" that make the breasts bounce when the rest of the skeleton moves. The setup and strength of these springs determines the strength of the breast bounce. Alternatively, the motion of the breasts may be governed by custom-written software, but this is more time-consuming and therefore rarer than using springs, which are a built-in feature in many game engines.

Unnatural breast physics

Some video games feature breast movements that appear unnatural or exaggerated. This may result from limitations of the "springs" system, which is better suited to animating rigid bodies rather than soft objects like breasts. In some games, however, exaggerated breast physics are intentional. This may be caused by increasing the bounce effect in order to make it noticeable even when a character is standing still and talking, which may result in wildly exaggerated bounces when she actually moves.

Ultimately, however, according to game developer Tim Dawson, if a video game features unnatural breast movements, "it's because somebody wanted them to look that way". Not only female bodies but also male bodies are often intentionally exaggerated or unrealistically portrayed in video games.

Breast physics in individual games

Games noted for exaggerated breast physics

Games noted by video game publications for their exaggerated breast physics include the following:

• Fatal Fury 2, fighting game (1992)^[7]
• Mortal Kombat, fighting game series (1992–)
• The King of Fighters, fighting game series (1994–)
• Soulcalibur, fighting game series (1995–)
• Dead or Alive, fighting game series (1996–). The bouncing was reduced in Dead or Alive 6, which uses a "natural" body physics engine.^[8]
• Ready 2 Rumble Boxing, sports game (1999)
• Conker's Bad Fur Day, platformer (2001), in which breasts are used as springboards
• Lula 3D, adult adventure game (2005), which used motion capture and advertised "Bouncin' Boobs Technology" on its boxart.^{[9] [10] [11] [12]}
• Resident Evil, action game (2002/2015)^[13]
• Ninja Gaiden Sigma 2, action game (2009), where the breasts' wobble can be separately controlled by the player
• Skullgirls, fighting game (2012)
• , role-playing game (2013)^[14]
• , action game (2015)^[15]

Games otherwise noted for their breast physics

• Policenauts (PlayStation version in 1996): Hideo Kojima "will never forget arguing over the 'breast jiggle issue' with Shuhei Yoshida".^[16]
• Fortnite Battle Royale (2017) used breast physics in a character model released in September 2018, which attracted controversy. The developer Epic Games later removed it as an "embarrassing and unintended" mistake.^[17]
• Conan Exiles (2017) allows players to customize a female character's breast size or a male character's penis size. The size affects how much either piece of anatomy jiggles.^{[18] [19]}

See also

• Gender representation in video games
• Sexism and video games

Further reading

• News: Breast physics: The controversy that plagues Dead or Alive games. Sam. Brooks . February 28, 2019 . Newshub. October 21, 2021 .
• News: Breasts' 'jiggle physics' met with online controversy. June 18, 2015 . Canadian Broadcasting Corporation. October 21, 2021 .
• News: Ryse and the problem of breasts in video games. Keith. Stuart. December 6, 2013 . The Guardian. October 21, 2021 .
• News: 'Fortnite' Breast Physics Error Is a Reminder of the Science of Boob Loving. Yasmin. Tayag. September 28, 2018 . Inverse. October 21, 2021 .
• Rogers, Ryan & Liebler, Carol. "Jubblies, mammaries and boobs: Discourses of breast physics in video games." Journal of Gaming & Virtual Worlds, Volume 9, Issue 3, September 2017, pp. 257-278. DOI: https://doi.org/10.1386/jgvw.9.3.257_1

Notes and References

1. News: Hernandez . Patricia . How Video Game Breasts Are Made (And Why They Can Go Wrong) . 12 February 2017 . . 24 February 2015 . live . https://web.archive.org/web/20170204024702/http://kotaku.com/how-video-game-breasts-are-made-and-why-they-can-go-so-1687753475 . 4 February 2017 .
2. Web site: Dead or Alive Extreme 3's Gratuitous T&A Deemed Too Sexist For American, European Audiences . Williams . Rob . 2015-11-26 . HotHardware . en-us . 2020-01-23.
3. News: Hernandez . Patricia . Street Fighter V's Ridiculous Breast Physics Are Still In The Game . 12 February 2017 . Kotaku . 16 February 2016 . live . https://web.archive.org/web/20170213163628/http://kotaku.com/street-fighter-vs-ridiculous-breast-physics-are-still-i-1759446755 . 13 February 2017 .
4. News: Yin-Poole . Wesley . Capcom patches out Chun-Li's ridiculous boob physics . 12 February 2017 . . 29 March 2016 . en-UK . live . https://web.archive.org/web/20170213001625/http://www.eurogamer.net/articles/2016-03-29-capcom-patches-out-chun-lis-ridiculous-boob-physics . 13 February 2017 .
5. Web site: The Boob Jam. theboobjam.com. 27 July 2017. en.
6. News: 'Boob Jam' explores unsexy side of breasts. 27 July 2017. Fox News. 9 August 2013.
7. News: Knight . Rich . The 10 Most Ridiculous Uses of Jiggle Physics in Games . 12 February 2017 . . 6 February 2012 . en . live . https://web.archive.org/web/20160916032831/http://www.complex.com/pop-culture/2012/02/the-10-most-ridiculous-uses-of-jiggle-physics-in-games/ . 16 September 2016 .
8. News: Yin-Poole . Wesley . Dead or Alive 6 tones down female character sexualisation . 28 September 2018 . Eurogamer.net . 18 June 2018 . en.
9. Web site: Why the Adults Only rating may be pointless and harmful to games as an art form. live. https://web.archive.org/web/20140403164014/http://www.polygon.com/2014/2/10/5362502/adults-only-rating-pointless-and-harmful-games-as-art-form. April 3, 2014. March 22, 2014. Polygon. 10 February 2014 . Vox Media. mdy-all.
10. Web site: A history of (muted) violence. live. https://web.archive.org/web/20140322224633/http://www.polygon.com/features/2013/8/8/4595050/adults-only-ao-games. March 22, 2014. March 22, 2014. Polygon. 8 August 2013 . Vox Media. mdy-all.
11. Web site: Gibson. Ellie. January 20, 2006. Lula 3D. Eurogamer. Gamer Network. February 12, 2011.
12. Web site: Sluganski. Randy. November 28, 2006. Lula 3D. dead. Just Adventure. https://web.archive.org/web/20071002040832/http://www.justadventure.com/reviews/Lula3D/Lula3D.shtm. October 2, 2007. March 3, 2018.
13. News: Gray. Kate. Let me get something off my chest about boob physics in video games. 29 July 2017. The Guardian. 21 January 2015.
14. Kohler. Chris. With Final Fantasy XIII's breast jiggle physics, Square Enix has lost the plot. 27 July 2017. WIRED UK. 31 July 2013.
15. News: Hansen . Steven . Metal Gear Solid V infinity boobs: More proof women are hard to animate . 12 February 2017 . . 15 October 2015 . en . live . https://web.archive.org/web/20170213090354/https://www.destructoid.com/metal-gear-solid-v-infinity-boobs-more-proof-women-are-hard-to-animate-315691.phtml . 13 February 2017 .
16. Web site: Hideo Kojima's Memories of the PlayStation. Nakamura. Toshi. December 11, 2014. Kotaku. en-US. https://web.archive.org/web/20160824131050/http://kotaku.com/hideo-kojimas-memoirs-of-the-playstation-1669705939. August 24, 2016. live. February 5, 2019. mdy-all.
17. Web site: Fortnite's boob physics are an 'embarrassing and unintended' mistake, will be fixed. Chalk. Andy. September 27, 2018. PC Gamer. September 27, 2018.
18. Web site: Conan Exiles has an 'endowment' slider and genital physics . Christopher . Livingstone . January 31, 2017 . September 27, 2018 . .
19. Web site: Conan Exiles director explains dong slider implementation . Joe . Donnelly . January 25, 2018 . September 27, 2018 . .