遮挡剔除-

Unity 3D物体遮挡剔除_unity 怎么开遮挡剔除-优快云博客

遮挡剔除 - Unity 手册

Unity性能优化-具体操作_unity occluder static-优快云博客

https://1024114.xyz/posts/4a5d44c0/

欠采样 

过采样

Input.backButtonLeavesApp = true;  //手机返回按钮交还给系统

Input.GetKeyDown(KeyCode.Escape) //手机返回键按下