Unity shader error: “Too many texture interpolators would be used for ForwardBase pass”
解决方法：
CGPROGRAM 下加一行：#pragma target 4.0
示例如下：
Ref: https://www.cnblogs.com/alps/p/7101092.html
Unity shader error: “Too many texture interpolators would be used for ForwardBase pass”
原文：https://www.cnblogs.com/open-coder/p/12079074.html