void HideEditorMesh()
{
Renderer[] rr = grid.GetComponentsInChildren <Renderer> (true);
for (int k = 0; k < rr.Length; k++)
{
#if UNITY_5_5_OR_NEWER
EditorUtility.SetSelectedRenderState(rr [k], EditorSelectedRenderState.Hidden);
#else
EditorUtility.SetSelectedWireframeHidden(rr [k], true);
#endif
}
}