如何使这个天空盒旋转(统一)?

好的,我需要使用这个skybox明暗器,因为它允许我需要的混合,问题是我也需要它旋转(动画旋转),如下所述: https://answers.unity.com/questions/651780/rotate-skybox-constantly.html

材质球:

Shader "RenderFX/Skybox Blended" {

 Properties {
     _Tint ("Tint Color", Color) = (.5, .5, .5, .5)
     _Tint1 ("Tint Color one", Color) = (.5, .5, .5, .5)
     _Tint2 ("Tint Color two", Color) = (.5, .5, .5, .5)
     _Blend ("Blend", Range(0.0,1.0)) = 0.5
     _Skybox1 ("Skybox one", Cube) = ""
     _Skybox2 ("Skybox two", Cube) = ""
 }

 SubShader {
     Tags { "Queue" = "Background" }
     Cull Off
     Fog { Mode Off }
     Lighting Off        
     Color [_Tint]
     Pass {
         SetTexture [_Skybox1] { combine texture }
         SetTexture [_Skybox2] { constantColor (0,0,0,[_Blend]) combine texture lerp(constant) previous }
         SetTexture [_Skybox2] { combine previous +- primary, previous * primary }
     }

 }

 Fallback "RenderFX/Skybox", 1
 }

我对skybox着色器很陌生,并尝试集成它们的代码,但它只是画出了错误。如何在这个天空盒上设置旋转动画?

RenderSettings.skybox.SetFloat("_Rotation", Time.time*0.4f);

也不起作用。