Unity内生成深度贴图

https://qiita.com/bokkuri_orz/items/08cbaeae6a34fed7f903

https://www.cnblogs.com/sifenkesi/p/4721649.html

https://docs.unity3d.com/Manual/SL-PlatformDifferences.html

https://blog.csdn.net/puppet_master/article/details/52819874