螢幕空間環境光遮蔽

螢幕空間環境光遮蔽（Screen Space Ambient Occlusion，SSAO）一種用於在電腦圖形中即時實現近似環境光遮蔽效果的彩現技術。由Vladimir Kajalin於在Crytek工作時開發，該演算法作為像素著色器，通過分析場景中紋理的深度值緩衝來實現，可以近似地表現出物體在環境光下產生的陰影。首次使用該特效的是2007年由Crytek開發的電腦遊戲Crysis。

使用SSAO的遊戲

末日之戰 (2007) (Windows) ^[1]
戰爭機器2 (2008) (Xbox 360)^[2]
潛行者：晴空染血 (2008) (Windows)^[3]
末日之戰：獵殺悍將 (2008) (Windows) ^[1]
帝國：全軍破敵 (2009) (Windows)^[4]
邊緣禁地 (2009) (Windows and Xbox 360 versions)^[5]
戰慄突擊2：起源計劃 (2009) (Windows) ^[6]
蝙蝠俠：阿卡漢瘋人院' (2009) (Windows and Xbox 360 versions)^[7]
秘境探險2：盜亦有道 (2009) (PlayStation 3)^[8]
潛行者：普里皮亞季的召喚 (2009) (Windows)^[9]
拿破崙：全軍破敵 (2010) (Windows)^[10]
正當防衛2 (2010) (Windows)^[11]
戰慄深隧 (2010) (Windows and Xbox 360 versions)^[12]
心靈殺手 (2010) (Xbox 360)^[13]
星戰前夜 (Nvidia GPUs only) ^[14]
最後一戰：瑞曲之戰 (2010) (Xbox 360)^[15]^[16]
星海爭霸II：自由之翼 (2010) (Windows) (after Patch 1.2.0 released 1/12/2011)^[17]
英雄城市 (2010) (Windows) ^[18]
武裝突襲2 (2009-2010) (Windows)^[19]
工人物語7：王國之路 (2010) (Windows) ^[20]
四海兄弟II (2010) (Windows and Xbox 360)^[21]^[22]
失憶症：黑暗後裔 (2010) (Windows)^[23]
刺客教條：兄弟會 (2010) (PlayStation 3 and Xbox 360)^[24]
戰地風雲：惡名昭彰2 (2010) (Windows) (uses HBAO - improved form of SSAO)^[25]
闇龍紀元2 (2011) (Windows)^[26]
末日之戰2 (2011) (Windows, Xbox 360 and PlayStation 3)^[27]
黑色洛城 (2011) (PlayStation 3, Xbox 360 and Windows)^[28]
駭客入侵：人類革命 (2011) (PlayStation 3, Xbox 360 and Windows)^[29]
死亡島 (2011) (PlayStation 3, Xbox 360 and Windows)^[30]
戰地風雲3 (2011) (PlayStation 3, Xbox 360 and Windows)^[31]
決勝時刻：現代戰爭3 (2011) (Windows version only)^[32]
黑街聖徒3 (2011) (PlayStation 3, Xbox 360 and Windows)^[33]
戰慄突擊3 (2011) (Windows and Xbox 360)
魔獸世界：熊貓人之謎 (2012) (Windows) (該特性首次使用於熊貓人之謎資料包)
歐洲卡車類比2 (2012) (windows, Mac OS X, Linux) (1.38 Open Beta)
美國卡車類比 (2016) (windows, Mac OS X, Linux) (1.38 Open Beta)

參考文獻

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CryENGINE® 2. Crytek. [2011-08-26]. （原始內容存檔於2011-08-15）.
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Gears of War Series | Showcase | Unreal Technology. Unrealengine.com. 2008-11-07 [2011-08-26]. （原始內容存檔於2011-08-19）.
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Empire: Total War – No anti-aliasing in combination with SSAO on Radeon graphics cards – Empire Total War, anti-aliasing, SSAO, Radeon, Geforce. PC Games Hardware. 2009-03-11 [2011-08-26]. （原始內容存檔於2012-04-17）（德語）.
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Head2Head: Borderlands Analysis. Lens of Truth. 2009-10-29 [2011-08-26]. （原始內容存檔於2011-08-23）.
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Head2Head – Batman: Arkham Asylum. Lens of Truth. 2009-08-24 [2011-08-26]. （原始內容存檔於2011-08-21）.
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Ask Bohemia (about Operation Arrowhead... or anything else you want to ask)! – Bohemia Interactive Community. Community.bistudio.com. 2010-05-06 [2011-08-26]. （原始內容存檔於2011-07-19）.
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存档副本. [2012-04-29]. （原始內容存檔於2012-04-28）.
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存档副本. [2012-04-29]. （原始內容存檔於2012-04-28）.
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存档副本. [2012-04-29]. （原始內容存檔於2014-05-18）.

參見

環境光遮蔽
螢幕空間定向遮蔽（英語：Screen space directional occlusion）（SSDO）

外部連結

Finding Next Gen – CryEngine 2
Video showing SSAO in action （頁面存檔備份，存於網際網路檔案館）
Image Enhancement by Unsharp Masking the Depth Buffer （頁面存檔備份，存於網際網路檔案館）
Hardware Accelerated Ambient Occlusion Techniques on GPUs （頁面存檔備份，存於網際網路檔案館）
Real-Time Depth Buffer Based Ambient Occlusion （頁面存檔備份，存於網際網路檔案館）
Source code of SSAO shader used in Crysis （頁面存檔備份，存於網際網路檔案館）
Approximating Dynamic Global Illumination in Image Space （頁面存檔備份，存於網際網路檔案館）
Accumulative Screen Space Ambient Occlusion
NVIDIA has integrated SSAO into drivers （頁面存檔備份，存於網際網路檔案館）
Several methods of SSAO are described in ShaderX7 book （頁面存檔備份，存於網際網路檔案館）
SSAO Shader ( Russian ) Archived 2012-05-19 at WebCite

[crysis_1-1] [1]
CryENGINE® 2. Crytek. [2011-08-26]. （原始內容存檔於2011-08-15）.

[2] [2]
Gears of War Series | Showcase | Unreal Technology. Unrealengine.com. 2008-11-07 [2011-08-26]. （原始內容存檔於2011-08-19）.

[3] [3]
STALKER: Clear Sky Tweak Guide. TweakGuides.com. [2011-08-26]. （原始內容存檔於2011-08-04）.

[4] [4]
Empire: Total War – No anti-aliasing in combination with SSAO on Radeon graphics cards – Empire Total War, anti-aliasing, SSAO, Radeon, Geforce. PC Games Hardware. 2009-03-11 [2011-08-26]. （原始內容存檔於2012-04-17）（德語）.

[5] [5]
Head2Head: Borderlands Analysis. Lens of Truth. 2009-10-29 [2011-08-26]. （原始內容存檔於2011-08-23）.

[6] [6]
存档副本. [2012-04-29]. （原始內容存檔於2012-03-21）.

[7] [7]
Head2Head – Batman: Arkham Asylum. Lens of Truth. 2009-08-24 [2011-08-26]. （原始內容存檔於2011-08-21）.

[8] [8]
Among Friends: How Naughty Dog Built Uncharted 2 – Page 3 | DigitalFoundry. Eurogamer.net. 2010-03-20 [2011-08-26]. （原始內容存檔於2010-07-21）.

[9] [9]
存档副本. [2012-04-29]. （原始內容存檔於2012-05-01）.

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存档副本. [2012-04-29]. （原始內容存檔於2012-04-17）.

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存档副本. [2012-04-29]. （原始內容存檔於2010-03-06）.

[12] [12]
存档副本. [2012-04-29]. （原始內容存檔於2014-11-13）.

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Alan Wake FAQ – Alan Wake Community Forums. Forum.alanwake.com. [2011-08-26]. （原始內容存檔於2011-07-27）.

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CCP. EVE Insider | Patchnotes. EVE Online. [2011-08-26]. （原始內容存檔於2011-09-02）.

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Bungie Weekly Update: 04.16.10 : 4/16/2010 3:38 PM PDT. Bungie.net. [2011-08-26]. （原始內容存檔於2011年9月16日）.

[16] [16]
Halo: Reach beta footage analysis – Page 1 | DigitalFoundry. Eurogamer.net. 2010-04-25 [2011-08-26]. （原始內容存檔於2012-02-22）.

[17] [17]
Entertainment, Blizzard. Patch 1.2.0 Now Live – StarCraft II. Us.battle.net. 2011-08-19 [2011-08-26]. （原始內容存檔於2011-09-03）.

[18] [18]
Issue 17: Dark Mirror Patch Notes | City of Heroes® : The Worlds Most Popular Superpowered MMO. Cityofheroes.com. [2011-08-26]. （原始內容存檔於2011-07-18）.

[19] [19]
Ask Bohemia (about Operation Arrowhead... or anything else you want to ask)! – Bohemia Interactive Community. Community.bistudio.com. 2010-05-06 [2011-08-26]. （原始內容存檔於2011-07-19）.

[20] [20]
now to post a comment!. The Settlers 7: Paths to a Kingdom – Engine. YouTube. 2010-03-21 [2011-08-26]. （原始內容存檔於2015-07-07）.

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存档副本. [2012-04-29]. （原始內容存檔於2012-04-02）.

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存档副本. [2012-04-29]. （原始內容存檔於2012-04-28）.

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存档副本. [2012-04-29]. （原始內容存檔於2012-04-28）.

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Face-Off: Assassin's Creed: Brotherhood – Page 2 | DigitalFoundry. Eurogamer.net. 2010-11-18 [2011-08-26]. （原始內容存檔於2011-09-08）.

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存档副本 (PDF). [2012-04-29]. （原始內容 (PDF)存檔於2014-07-26）.

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