次の項目は別ページに分割しました。
関連ページ：
輪郭／ハイライト (Outline / Highlight)
ビルトイン
入手：
Simple X-Ray Special Effect | Unity Asset Store [Official]
Objectify – Highlight and Loot | Unity Asset Store [Official]
Selected Effect – Outline | Unity Asset Store [Official]
Outline and Color Animations | Unity Asset Store [Official]
URP
入手：
Selected Effect – Outline URP | Unity Asset Store [Official]
ビルトイン／UPR
入手：
Highlight Plus | Unity Asset Store [Official]
HDRP
入手：
HDRP Outline | Unity Asset Store [Official]
ビルトイン／URP／HDRP
入手：
Easy Performant Outline 2D / 3D | Unity Asset Store [Official]
ハイライト (Highlight)
入手：
Object Highlight | Unity Asset Store [Official]
手描き風／スケッチ
入手：
NPR Contour Drawing | Unity Asset Store [Official]
Quick Outline
動画：
入手：
Quick Outline | Unity Asset Store [Official]
Easy Performant Outline 2D / 3D
動画：
URP Setup and Outliner Component
入手：
Easy Performant Outline 2D / 3D | Unity Asset Store [Official]
Highlight Plus
動画：
入手：
Highlight Plus | Unity Asset Store [Official]
フォーラム：
Highlight Plus | Kronnect Support Forum [Official]
参考：