Unity - Manual: Layers

Unity - Manual: Grayscale

Unity - Layers

Easy environment design with Unity Terrain features - LogRocket Blog

Feature Request - Choose Layers for Camera to draw - Cinematics

Unity VR游戏开发干货教程：VR中的交互方式- GameRes游资网

Unity - Manual: Tags and Layers

Unity: Working With The Terrain System, by Michael Quinn, Unity Coder Corner

VR中的交互方式-腾讯游戏学堂

Unity - Manual: Tags and Layers