材质球向shader传值失败

unity中导入spine模型，当模型挂载SkeletonMecanim组件后，发现材质球向shader传值失败，改为SetPropertyBlock后可行。

//spine模型使用材质球传参数，当spine模型上挂载有SkeletonMecanim的情况下，会传值失败!!!!         // foreach (var mat in m_SkinMaterials)         // {         //     int ShenshiIntensity = Shader.PropertyToID("_ShenshiIntensity");         //     mat.SetFloat(ShenshiIntensity, _value);         // }                  int ShenshiIntensity = Shader.PropertyToID("_ShenshiIntensity");         List<Renderer> rendererList = m_Actor.GetAllRenderer();         for (int i=0;i<rendererList.Count;++i)         {             MaterialPropertyBlock pb = new MaterialPropertyBlock();             pb.SetFloat(ShenshiIntensity, _value);             rendererList[i].SetPropertyBlock(pb);         }