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東京工科大学
中村陽介

からこれ!

Unity でポストエフェクトしよう
ゲームの見た目を良くする処理
映像制作の工程が完全ディジタルに移行後、 ポストエフェク
ト工程により、ハリウッド映画の映像クオリティは格段に向上
した
(見た目の鮮やかさ等)
近年では日本の映像制作でもやっと重視されるようになった
(八重の桜・告白など)
ゲームでも PS2 中期以降、ポストエフェクトが用いられてい
る(たぶんこれくらいの時期)
Unity は Pro 版で強力なポストエフェクトコンポーネントが多
数利用できる( imageEffects )
わかりやすいポストエフェクトの
例 Tenacious D - Rize Of The Fenix (邦題:鳳凰♂昇天)

ようつべで検索してね
ポストエフェクト処理後と処理前が切り替わる動画
Unity でのポストエフェクトの例

適用前

適用後
スクリーンスペースアンビエントオク
ルージョン
オブジェクトの凹部分の陰影を強調する
スクリーンスペースアンビエントオク
ルージョン
オブジェクトの凹部分の陰影を強調する
デプスオブフィールド(被写界深
度)
カメラのレンズ効果によるぼけを再現
デプスオブフィールド(被写界深
度)
カメラのレンズ効果によるぼけを再現
グロウエフェクト
明るい部分を広げて重ねる
グロウエフェクト
明るい部分を広げて重ねる
ブルーム
カメラレンズの現象の一つである、光の飽和表現を行う
ブルーム
カメラレンズの現象の一つである、光の飽和表現を行う
コントラストストレッチ
コントラストを変更
コントラストストレッチ
コントラストを変更
カラーコレクションカーブ
色味の調整
カラーコレクションカーブ
色味の調整
すべて適用
適用前
すべて適用
適用後
ポストエフェクトしてみよう
ポストエフェクトは細かい処理の積み重ね!
一つ一つは劇的な効果はないが、組み合わせていくとじわじ
わ違いが出てくる
但しやりすぎるとどぎつい画になるので注意!
コントラストを上げて画面を引き締める、とかカラーコレク
ションカーブで青味を足して空気感を出すとか、一つ一つに意
味を持たせると尚 GOOD
処理にかかる負荷
ポストエフェクトはモノによっては PC にかかる負荷が高い
高負荷
スクリーンスペースアンビエントオクルージョン
デプスオブフィールド

低負荷
ブルーム
グロウエフェクト
コントラストストレッチ
カラーコレクションカーブ

性能がまちまちの PC ではポストエフェクトがオプションで
ON/OFF できることが一般的

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