private bool TileIsDiggable(LevelTile tile)
{
// tile is not opened AND (tile is adjacent to room OR tile is adjacent to highlighted tile)
return(!tile.Opened &&
(LevelHelpers.IsTileAdjacentToDigMarkedTile(LevelController.Instance.Model, tile.X, tile.Z) ||
LevelHelpers.IsTileAdjacentToHell(LevelController.Instance.Model, tile.X, tile.Z)));
}