void UpdateBorderMeshColor(Color color)
 {
     MeshUtil.UpdateColor(borderMeshRenderer, color);
 }
 /***** PRIVATE: RENDERING *****/
 void RemoveBorder()
 {
     using (var vh = new VertexHelper()) {
         MeshUtil.UpdateMesh(borderMeshFilter, vh);
     }
 }
 void UpdateInnerMeshColor(Color newColor)
 {
     MeshUtil.UpdateColor(innerMeshRenderer, color);
 }