private void CreateCeilingWarningSign(TerrainChunk chunk) {
PolydrawObject ceiling = chunk.GetFirstCeiling();
List<Vector2> points = ceiling.GetWorldBorderPoints();
Vector2 lastPoint = points.GetLast();
Sign sign = Instantiate(signPrefab);
sign.transform.SetParent(ceiling.transform);
sign.transform.position = lastPoint;
sign.SetAsCeilingSign();
sign.SetIcon(TerrainSetType.Flat);
}
