unity multi_compile

比较容易理解得两个

Unity #pragma multi_compile说明（简单得代码实例说明）

https://blog.csdn.net/ak47007tiger/article/details/100007655

让我们好好聊聊Unity Shader中的multi_complie

https://zhuanlan.zhihu.com/p/77043332

 ------------------------------------------------------------------------------------------------

 这篇很详细

unity shader 变种（多重编译 multi_compile）-

https://blog.csdn.net/yinfourever/article/details/103072057

  ------------------------------------------------------------------------------------------------

Unity Shader - 使用multi_compile对Shader渲染质量控制

https://blog.csdn.net/linjf520/article/details/93721871