diff --git a/Assets/Cryville.EEW.Unity/Map/PolygonRenderer.cs b/Assets/Cryville.EEW.Unity/Map/PolygonRenderer.cs
index 049ba29..a265f38 100644
--- a/Assets/Cryville.EEW.Unity/Map/PolygonRenderer.cs
+++ b/Assets/Cryville.EEW.Unity/Map/PolygonRenderer.cs
@@ -77,7 +77,13 @@ namespace Cryville.EEW.Unity.Map {
 			DTSweep.Triangulate(tcx);
 
 			var codeToIndex = new Dictionary<uint, int>();
-			var vertices = ArrayPool<Vector3>.Shared.Rent(convertedPolygon.Points.Count);
+			int vertexCount = convertedPolygon.Points.Count;
+			if (convertedPolygon.Holes != null) {
+				foreach (var hole in convertedPolygon.Holes) {
+					vertexCount += hole.Points.Count;
+				}
+			}
+			var vertices = ArrayPool<Vector3>.Shared.Rent(vertexCount);
 			var triangles = ArrayPool<int>.Shared.Rent(convertedPolygon.Triangles.Count * 3);
 			int vi = 0, ii = 0;
 			foreach (var tri in convertedPolygon.Triangles) {