void TintOutsideZone() foreach (var pos in groundTilemap.cellBounds.allPositionsWithin) Vector3 worldPos = groundTilemap.GetCellCenterWorld(pos); float dist = Vector2.Distance(worldPos, center); Color color = dist > currentRadius ? Color.red : Color.white; groundTilemap.SetTileFlags(pos, TileFlags.None); groundTilemap.SetColor(pos, color);