Unity shader error: “Too many texture interpolators would be used for ForwardBase pass”

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”

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